@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:wght@600;700;800&display=swap";:root{--color-primary:#0b63ff;--color-primary-hover:#084ed1;--color-secondary:#22b7ff;--color-accent:#00e0b8;--color-background:#f5fbff;--color-background-soft:#fcfeff;--color-surface:#fff;--color-text:#0d1b2a;--color-text-secondary:#5b6675;--color-border:#dcebff;--color-success:#00b894;--color-warning:#f59e0b;--color-error:#e53935;--shadow-sm:0 4px 10px #0b63ff0d;--shadow-md:0 12px 30px #0b63ff1a;--shadow-lg:0 20px 50px #0b63ff2e;--radius-sm:10px;--radius-md:14px;--radius-lg:20px;--transition:.25s ease}*,:before,:after{box-sizing:border-box}html{scroll-behavior:smooth}body{background:linear-gradient(180deg, #fff, #f9fcff 40%, var(--color-background));min-height:100vh;color:var(--color-text);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;margin:0;font-family:Inter,sans-serif;line-height:1.6}#root{max-width:1400px;min-height:100vh;margin:0 auto}h1,h2,h3,h4,h5,h6{color:var(--color-text);margin-top:0;font-family:Plus Jakarta Sans,sans-serif}h1{font-size:clamp(2.4rem,5vw,4rem);font-weight:800}h2{font-size:2rem;font-weight:700}h3{font-size:1.35rem;font-weight:700}p{color:var(--color-text-secondary)}a{color:var(--color-primary);transition:var(--transition);text-decoration:none}a:hover{color:var(--color-primary-hover)}img{max-width:100%;display:block}input,textarea,select,button{font:inherit}:focus-visible{outline-offset:2px;outline:3px solid #0b63ff2e}::selection{background:#0b63ff2e}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:#eef5ff}::-webkit-scrollbar-thumb{background:linear-gradient(180deg, var(--color-primary), var(--color-secondary));border-radius:999px}::-webkit-scrollbar-thumb:hover{background:var(--color-primary)}.text-center{text-align:center}.hidden{display:none!important}.w-100{width:100%}.surface{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}.hover-card{transition:transform var(--transition), box-shadow var(--transition), border-color var(--transition)}.hover-card:hover{box-shadow:var(--shadow-lg);border-color:#0b63ff40;transform:translateY(-6px)}input,textarea,select{border-radius:var(--radius-md);border:1px solid var(--color-border);width:100%;color:var(--color-text);transition:var(--transition);background:#fff;padding:.85rem 1rem}input::placeholder,textarea::placeholder{color:#9ca3af}input:focus,textarea:focus,select:focus{border-color:var(--color-primary);outline:none;box-shadow:0 0 0 4px #0b63ff1f}button{border-radius:var(--radius-md);cursor:pointer;border:none;font-family:inherit;font-weight:700;transition:all .25s}button:disabled{opacity:.55;cursor:not-allowed;box-shadow:none;transform:none}button:not(:disabled):hover{transform:translateY(-2px)}button:not(:disabled):active{transform:scale(.98)}.fade-up{animation:.45s fadeUp}.fade-in{animation:.35s fadeIn}@keyframes fadeUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.container{width:100%;max-width:1300px;margin:0 auto}.page-section{padding:4rem 1.5rem}.page-title{margin-bottom:.75rem}.page-subtitle{color:var(--color-text-secondary)}@media (width<=992px){#root{max-width:100%}}@media (width<=768px){body{font-size:15px}.page-section{padding:2rem 1rem}h1{font-size:2.25rem}h2{font-size:1.6rem}h3{font-size:1.2rem}}@media (width<=480px){body{font-size:14px}}.navbar{z-index:100;-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--color-border);background:#ffffffe0;justify-content:space-between;align-items:center;gap:2rem;margin-bottom:2rem;padding:1rem 2rem;display:flex;position:sticky;top:0}.navbar__brand{align-items:center;gap:1rem;display:flex}.navbar__logo{object-fit:contain;width:56px;height:56px;transition:transform .25s}.navbar__logo:hover{transform:rotate(-5deg)scale(1.05)}.navbar__nav{align-items:center;gap:2rem;display:flex}.navbar__link{color:var(--color-text-secondary);font-size:1rem;font-weight:600;text-decoration:none;transition:all .25s;position:relative}.navbar__link:hover,.navbar__link.active{color:var(--color-primary)}.navbar__link.active:after{content:"";background:linear-gradient(90deg, var(--color-primary), var(--color-secondary));border-radius:999px;width:100%;height:3px;position:absolute;bottom:-8px;left:0}.logout-button{min-width:120px}.navbar__profile-link{align-items:center;gap:8px;min-width:0;display:inline-flex}.navbar__profile-icon{justify-content:center;align-items:center;font-size:18px;display:inline-flex}.navbar__profile-name{text-overflow:ellipsis;white-space:nowrap;max-width:180px;overflow:hidden}@media (width<=768px){.navbar{flex-wrap:wrap;gap:1rem;padding:1rem}.navbar__logo{width:48px;height:48px}.navbar__nav{order:3;justify-content:center;gap:1.5rem;width:100%}.logout-button{min-width:unset}.navbar__profile-name{max-width:100px}}.button{border-radius:var(--radius-md);cursor:pointer;-webkit-user-select:none;user-select:none;border:none;justify-content:center;align-items:center;gap:.5rem;min-height:46px;padding:.9rem 2rem;font-family:inherit;font-size:1rem;font-weight:700;line-height:1;text-decoration:none;transition:transform .25s,box-shadow .25s,background .25s,color .25s,border-color .25s;display:inline-flex}.button-primary{background:linear-gradient(135deg, var(--color-primary), var(--color-secondary));color:#fff;box-shadow:var(--shadow-sm)}.button-primary:hover:not(:disabled){box-shadow:var(--shadow-lg);transform:translateY(-3px)}.button-primary:active:not(:disabled){transform:scale(.98)}.button-secondary{color:var(--color-primary);border:1px solid var(--color-border);background:#fff}.button-secondary:hover:not(:disabled){border-color:var(--color-primary);background:#f4f9ff}.button-outline{color:var(--color-primary);border:2px solid var(--color-primary);background:0 0}.button-outline:hover:not(:disabled){background:#0b63ff14}.button-danger{background:var(--color-error);color:#fff}.button-danger:hover:not(:disabled){background:#c62828}.button-full-width{width:100%}.button:disabled{opacity:.55;cursor:not-allowed;box-shadow:none;transform:none}.button:focus-visible{outline:none;box-shadow:0 0 0 4px #0b63ff2e}@media (width<=768px){.button{width:100%;padding:.9rem 1.5rem;font-size:.95rem}}.page-container{max-width:1200px;margin:0 auto;padding:2rem 2.5rem}@media (width<=768px){.page-container{padding:16px}}*{box-sizing:border-box}body{background:var(--background);color:var(--text);margin:0;font-family:Inter,sans-serif}.hero{text-align:center;background:radial-gradient(circle at 100% 0,#22b7ff22,#0000 40%),radial-gradient(circle at 0 100%,#00e0b822,#0000 40%),#fff;padding:4rem 1.5rem;position:relative;overflow:hidden}.logo{width:110px;margin-bottom:1.5rem}.hero h1{letter-spacing:-.03em;margin:0;font-family:Plus Jakarta Sans,sans-serif;font-size:clamp(2.4rem,5vw,4rem);font-weight:800}.tagline{color:var(--primary);margin-top:.75rem;font-size:1.15rem;font-weight:700}.hero-description{max-width:700px;color:var(--text-light);margin:1.5rem auto 2rem;font-size:1.05rem;line-height:1.8}.start-button{background:linear-gradient(135deg, var(--primary), var(--secondary));color:#fff;cursor:pointer;border:none;border-radius:14px;padding:.9rem 2rem;font-size:1rem;font-weight:700;transition:transform .25s,box-shadow .25s;box-shadow:0 8px 20px #0b63ff29}.start-button:hover{transform:translateY(-3px);box-shadow:0 12px 24px #0b63ff40}.start-button:active{transform:translateY(0)}.start-button:focus-visible{outline-offset:4px;outline:3px solid #00e0b84d}.stats{grid-template-columns:repeat(3,1fr);gap:1rem;max-width:900px;margin:-30px auto 3rem;padding:0 1.5rem;display:grid}.stats div{text-align:center;background:#fff;border:1px solid #dcebffbf;border-radius:18px;padding:1.4rem;transition:transform .25s,box-shadow .25s;position:relative;overflow:hidden;box-shadow:0 8px 24px #0000000d}.stats div:before{content:"";background:linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));opacity:.8;width:100%;height:3px;position:absolute;top:0;left:0}.stats div:hover{transform:translateY(-3px);box-shadow:0 12px 28px #0b63ff17}.stats strong{color:var(--primary);font-size:2rem;display:block}.stats span{color:var(--text-light)}.subjects-container{max-width:1300px;margin:auto;padding:0 1.5rem 5rem}.section-heading{text-align:center;margin-bottom:2.5rem}.section-heading h2{color:var(--text);margin-bottom:.5rem;font-family:Plus Jakarta Sans,sans-serif;font-size:2rem;font-weight:800}.section-heading p{color:var(--text-light)}.subject-grid{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem;display:grid}.subject-card{cursor:pointer;border:1px solid var(--border);background:linear-gradient(145deg,#fff 0% 65%,#f8fcff 100%);border-radius:18px;flex-direction:column;padding:1.8rem;transition:transform .25s,border-color .25s,box-shadow .25s;display:flex;position:relative;overflow:hidden;box-shadow:0 5px 18px #0d1b2a09}.subject-card:before{content:"";background:linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));opacity:0;width:100%;height:4px;transition:opacity .25s;position:absolute;top:0;left:0}.subject-card:hover{border-color:var(--primary);transform:translateY(-6px);box-shadow:0 15px 35px #0b63ff1f}.subject-card:hover:before{opacity:1}.subject-card:focus-visible{outline-offset:4px;outline:3px solid #00e0b84d}.subject-card h3{color:var(--primary);margin-top:0;margin-bottom:.8rem;font-family:Plus Jakarta Sans,sans-serif;font-weight:800}.subject-card p{color:var(--text-light);line-height:1.7}.home-subject-actions{margin-top:auto;padding-top:1.25rem}.home-quiz-button{background:linear-gradient(135deg, var(--primary), var(--secondary));color:#fff;cursor:pointer;border:1px solid #0b63ff1a;border-radius:12px;justify-content:center;align-items:center;gap:.55rem;padding:.75rem 1.1rem;font-size:.9rem;font-weight:700;transition:transform .2s,box-shadow .2s;display:inline-flex;box-shadow:0 7px 18px #0b63ff29}.home-quiz-button:hover{transform:translateY(-2px);box-shadow:0 11px 24px #0b63ff3d}.home-quiz-button:active{transform:translateY(0)}.home-quiz-button:focus-visible{outline-offset:3px;outline:3px solid #00e0b84d}.home-quiz-icon{font-size:1rem}.footer{text-align:center;background:#fafafa;border-top:1px solid #e5e7eb;margin-top:4rem;padding:2rem 1rem}.footer-links{flex-wrap:wrap;justify-content:center;gap:.75rem 1.5rem;margin-bottom:1rem;display:flex}.footer-links button{color:#2563eb;cursor:pointer;background:0 0;border:none;font-size:.95rem;transition:color .2s}.footer-links button:hover{text-decoration:underline}.footer-links a{color:var(--primary);font-size:.95rem;font-weight:600;text-decoration:none;transition:color .2s}.footer-links a:hover{color:#084fd1;text-decoration:underline}.footer-copy{color:#666;font-size:.9rem}.landing-header{box-sizing:border-box;justify-content:space-between;align-items:center;width:100%;padding:20px 6%;display:flex}.landing-logo{color:var(--color-primary);font-size:1.7rem;font-weight:800}.landing-nav{align-items:center;gap:12px;display:flex}.landing-nav a{border-radius:8px;padding:9px 18px;font-weight:600;text-decoration:none;transition:all .2s}.login-link{color:var(--color-primary)}.login-link:hover{background:var(--color-background)}.register-link{color:#fff;background:var(--color-primary)}.register-link:hover{background:var(--color-primary-hover)}.home-learning-section{width:min(1100px,100% - 40px);margin:55px auto 20px}.home-learning-section .section-heading{text-align:center;margin-bottom:28px}.home-learning-grid{grid-template-columns:repeat(3,1fr);gap:20px;display:grid}.home-learning-card{color:#0d1b2a;text-align:left;width:100%;font:inherit;cursor:pointer;background:#fff;border:1px solid #0b63ff1f;border-radius:18px;align-items:flex-start;gap:18px;padding:24px;transition:transform .18s,box-shadow .18s,border-color .18s;display:flex;box-shadow:0 8px 26px #0d1b2a0d}.home-learning-card:hover{border-color:#0b63ff59;transform:translateY(-4px);box-shadow:0 14px 32px #0d1b2a17}.home-learning-card-featured{background:linear-gradient(145deg,#fff 0%,#f5fbff 60%,#00e0b814 100%);border-color:#0b63ff3d}.home-learning-icon{color:#fff;background:linear-gradient(135deg,#0b63ff,#22b7ff);border-radius:14px;flex:0 0 52px;justify-content:center;align-items:center;width:52px;height:52px;font-size:1.45rem;font-weight:800;display:flex}.home-learning-content{min-width:0}.home-learning-step{color:#0b63ff;letter-spacing:.1em;margin-bottom:5px;font-size:.7rem;font-weight:800;display:block}.home-learning-content h3{color:#0d1b2a;margin:0 0 8px;font-size:1.18rem}.home-learning-content p{color:#5c6c7b;margin:0 0 14px;font-size:.92rem;line-height:1.6}.home-learning-link{color:#0b63ff;font-size:.9rem;font-weight:700}@media (width<=900px){.home-learning-grid{grid-template-columns:1fr}}@media (width<=768px){.stats{grid-template-columns:1fr;margin-top:2rem}.hero{padding:3rem 1.2rem}.logo{width:85px}.subject-card{padding:1.4rem}.subject-card:hover{transform:none}.home-subject-actions{margin-top:1rem;padding-top:0}.home-quiz-button{width:100%;padding:.8rem 1rem}.landing-header{padding:16px 1.2rem}.landing-logo{font-size:1.4rem}.landing-nav{gap:8px}.landing-nav a{padding:8px 12px;font-size:.9rem}.footer{padding:1.75rem 1rem}.footer-links{gap:.7rem 1rem}.home-learning-section{width:min(100% - 24px,1100px);margin-top:38px}.home-learning-card{padding:20px}.home-learning-icon{flex-basis:46px;width:46px;height:46px}}.error-message{background:var(--color-danger-light);color:var(--color-danger);border-radius:8px;padding:1rem}.login-page{justify-content:center;align-items:center;min-height:100vh;padding:2rem;display:flex}.login-card{background:var(--color-surface);border-radius:24px;width:100%;max-width:440px;padding:3rem;box-shadow:0 10px 40px #0f172a14}.login-title{text-align:center;color:var(--color-text-secondary);margin-bottom:.75rem;font-size:2.4rem;font-weight:700}.login-subtitle{text-align:center;color:var(--color-text-secondary);margin-bottom:2rem;line-height:1.6}.login-form{flex-direction:column;gap:1.25rem;display:flex}.login-form input{border:1px solid var(--color-border);width:100%;color:var(--color-text-primary);background:#fff;border-radius:12px;outline:none;padding:.9rem 1rem;font-size:1rem;transition:border-color .2s,box-shadow .2s,background .2s,opacity .2s}.login-form input:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px #0b63ff14}.login-button{background:linear-gradient(135deg, var(--primary), var(--secondary));color:#fff;cursor:pointer;border:none;border-radius:14px;margin-top:.5rem;padding:.9rem 2rem;font-size:1rem;font-weight:700;transition:transform .25s,box-shadow .25s,opacity .25s;box-shadow:0 7px 18px #0b63ff24}.login-button:hover:not(:disabled){transform:translateY(-3px);box-shadow:0 12px 24px #0b63ff40}.login-button:active:not(:disabled){transform:translateY(0)}.login-button:focus-visible{outline-offset:3px;outline:3px solid #00e0b84d}.login-button:disabled{cursor:not-allowed;opacity:.7;transform:none;box-shadow:0 5px 14px #0b63ff1a}.login-button:disabled:hover{transform:none}.login-form input:disabled{cursor:not-allowed;opacity:.7;background:#f8fafc}.login-logo{flex-direction:column;align-items:center;margin-bottom:1rem;display:flex}.login-logo img{width:200px;height:200px;margin-bottom:.75rem}.login-logo-image{object-fit:contain;width:144px;height:144px;margin-bottom:.75rem}.login-footer{text-align:center;color:var(--color-text-secondary);margin-top:1.5rem;font-size:.95rem}.login-footer a{color:var(--color-primary);font-weight:600;text-decoration:none}.login-footer a:hover{text-decoration:underline}.success-message{color:var(--color-success);border:1px solid var(--color-success-light);background:#eaf8ef;border-radius:12px;margin-bottom:1rem;padding:.9rem 1rem;font-size:.95rem}.password-input-wrapper{width:100%;position:relative}.password-input-wrapper input{box-sizing:border-box;width:100%;padding-right:3rem}.password-toggle{cursor:pointer;color:#6b7280;background:0 0;border:none;justify-content:center;align-items:center;margin:0;padding:0;transition:color .2s,opacity .2s;display:flex;position:absolute;top:50%;right:1rem;transform:translateY(-50%)}.password-toggle:hover:not(:disabled){color:var(--color-primary)}.password-toggle:disabled{cursor:not-allowed;opacity:.45}@media (width<=768px){.login-page{min-height:100dvh;padding:1rem}.login-card{border-radius:20px;max-width:100%;padding:2rem 1.25rem}.login-logo{margin-bottom:.75rem}.login-logo img,.login-logo-image{width:130px;height:130px;margin-bottom:.5rem}.login-title{margin-bottom:.5rem;font-size:2rem}.login-subtitle{margin-bottom:1.5rem;font-size:.95rem}.login-form{gap:1rem}.login-form input{padding:.85rem .9rem;font-size:1rem}.password-input-wrapper input{padding-right:3rem}.login-button{width:100%;padding:.9rem 1rem}.login-footer{margin-top:1.25rem;font-size:.9rem}}.section-page{background:var(--background);min-height:100vh}.section-header{border-bottom:1px solid var(--border);background:#fff;justify-content:space-between;align-items:center;padding:2rem;display:flex}.section-title-group h1{color:var(--primary);margin:0;font-family:Plus Jakarta Sans,sans-serif;font-size:2.4rem;font-weight:800}.section-title-group p{color:var(--text-light);margin-top:.6rem}.home-btn{background:linear-gradient(135deg, var(--primary), var(--secondary));color:#fff;cursor:pointer;border:none;border-radius:12px;padding:.9rem 1.6rem;font-weight:700;transition:all .25s}.home-btn:hover{transform:translateY(-2px);box-shadow:0 10px 24px #0b63ff2e}.section-container{max-width:1300px;margin:auto;padding:3rem 1.5rem 5rem}.topic-grid{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem;display:grid}.topic-card{background:var(--surface);border:1px solid var(--border);cursor:pointer;border-radius:18px;padding:1.6rem;transition:all .25s}.topic-card:hover{border-color:var(--primary);transform:translateY(-6px);box-shadow:0 16px 36px #0b63ff1f}.topic-card h3{color:var(--primary);margin-top:0;margin-bottom:.8rem;font-size:1.25rem}.topic-card p{color:var(--text-light);margin:0;line-height:1.7}.topic-number{background:linear-gradient(135deg, var(--primary), var(--secondary));color:#fff;border-radius:50%;justify-content:center;align-items:center;width:42px;height:42px;margin-bottom:1rem;font-weight:700;display:flex}.empty-state{border:1px dashed var(--border);text-align:center;color:var(--text-light);background:#fff;border-radius:18px;padding:4rem 2rem}.breadcrumb-container{max-width:1300px;color:var(--text-light);margin:0 auto;padding:1.25rem 1.5rem 0;font-size:.95rem}.breadcrumb-link{cursor:pointer;color:var(--primary);font-weight:600}.breadcrumb-separator{margin:0 .55rem}.breadcrumb-current{font-weight:600}.subject-practice-section{margin-top:3rem}.subject-practice-card{border:1px solid var(--border);cursor:pointer;background:linear-gradient(135deg,#fff 0%,#eef7ff 100%);border-radius:20px;align-items:center;gap:1.5rem;padding:1.8rem 2rem;transition:transform .25s,box-shadow .25s,border-color .25s;display:flex}.subject-practice-card:hover{border-color:var(--primary);transform:translateY(-4px);box-shadow:0 16px 36px #0b63ff1f}.subject-practice-card:focus-visible{outline-offset:3px;outline:3px solid #0b63ff40}.subject-practice-icon{background:linear-gradient(135deg, var(--primary), var(--secondary));border-radius:18px;flex-shrink:0;justify-content:center;align-items:center;width:64px;height:64px;font-size:1.8rem;display:flex;box-shadow:0 8px 20px #0b63ff2e}.subject-practice-content{flex:1;min-width:0}.subject-practice-label{color:var(--primary);letter-spacing:.08em;margin-bottom:.4rem;font-size:.75rem;font-weight:800;display:inline-block}.subject-practice-content h2{color:var(--text);margin:0 0 .45rem;font-family:Plus Jakarta Sans,sans-serif;font-size:1.35rem;font-weight:800}.subject-practice-content p{max-width:700px;color:var(--text-light);margin:0;line-height:1.6}.subject-practice-action{background:linear-gradient(135deg, var(--primary), var(--secondary));color:#fff;border-radius:12px;flex-shrink:0;padding:.8rem 1.2rem;font-size:.9rem;font-weight:700;transition:transform .2s}.subject-practice-card:hover .subject-practice-action{transform:translate(3px)}.subject-solved-section{margin-top:3rem}.subject-solved-card{cursor:pointer;background:linear-gradient(135deg,#fff 0%,#f5fbff 65%,#00e0b814 100%);border:1px solid #0b63ff2e;border-radius:20px;align-items:center;gap:1.5rem;padding:1.75rem;transition:transform .2s,border-color .2s,box-shadow .2s;display:flex;box-shadow:0 12px 30px #0b63ff12}.subject-solved-card:hover{border-color:#0b63ff66;transform:translateY(-3px);box-shadow:0 16px 34px #0b63ff1c}.subject-solved-card:focus-visible{outline-offset:4px;outline:3px solid #00e0b84d}.subject-solved-icon{color:#fff;background:linear-gradient(135deg,#0b63ff,#22b7ff);border-radius:18px;flex-shrink:0;justify-content:center;align-items:center;width:64px;height:64px;font-size:1.8rem;font-weight:800;display:flex}.subject-solved-content{flex:1;min-width:0}.subject-solved-label{color:#0b63ff;letter-spacing:.08em;margin-bottom:.4rem;font-size:.75rem;font-weight:800;display:block}.subject-solved-content h2{color:#0d1b2a;margin:0 0 .45rem;font-size:1.3rem}.subject-solved-content p{color:#5b6675;margin:0;line-height:1.6}.subject-solved-action{color:#fff;white-space:nowrap;background:linear-gradient(135deg,#0b63ff,#22b7ff);border-radius:12px;flex-shrink:0;padding:.85rem 1.2rem;font-size:.9rem;font-weight:700}@media (width<=768px){.section-header{text-align:center;flex-direction:column;gap:1.5rem}.section-title-group h1{font-size:2rem}.home-btn{width:100%;max-width:220px}.section-container{padding:2rem 1rem 4rem}.topic-grid{grid-template-columns:1fr}.subject-practice-section{margin-top:2rem}.subject-practice-card{flex-direction:column;align-items:flex-start;padding:1.5rem}.subject-practice-icon{border-radius:15px;width:54px;height:54px;font-size:1.5rem}.subject-practice-content h2{font-size:1.2rem}.subject-practice-action{box-sizing:border-box;text-align:center;width:100%}.subject-solved-section{margin-top:2rem}.subject-solved-card{flex-direction:column;align-items:flex-start;gap:1rem;padding:1.4rem}.subject-solved-icon{border-radius:15px;width:54px;height:54px;font-size:1.5rem}.subject-solved-content h2{font-size:1.15rem}.subject-solved-action{text-align:center;width:100%}}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);margin-bottom:2rem;padding:2rem;transition:transform .25s,box-shadow .25s,border-color .25s}.card:hover{box-shadow:var(--shadow-lg);border-color:#0b63ff40;transform:translateY(-4px)}.card h2{color:var(--color-text);margin:0 0 1.25rem;font-size:1.5rem;font-weight:700}.card p{color:var(--color-text-secondary);line-height:1.7}@media (width<=768px){.card{border-radius:16px;padding:1.5rem}}.confirm-dialog-backdrop{z-index:1000;background:#00000059;justify-content:center;align-items:center;padding:1.5rem;display:flex;position:fixed;inset:0}.confirm-dialog{flex-direction:column;gap:1rem;width:100%;max-width:420px;display:flex}.confirm-dialog-title{margin:0;font-size:1.25rem;font-weight:600}.confirm-dialog-message{color:var(--color-text-secondary);margin:0;line-height:1.6}.confirm-dialog-actions{justify-content:flex-end;gap:.75rem;margin-top:.5rem;display:flex}@media (width<=480px){.confirm-dialog{max-width:100%}.confirm-dialog-actions{flex-direction:column-reverse}.confirm-dialog-actions button{width:100%}}:root{--primary:#0b63ff;--secondary:#22b7ff;--accent:#00e0b8;--background:#f5fbff;--surface:#fff;--text:#0d1b2a;--text-light:#5b6675;--border:#dcebff}.topic-page{background:var(--background);min-height:100vh}.topic-layout{grid-template-columns:300px 1fr;gap:2rem;max-width:1500px;margin:auto;padding:2rem;display:grid}.topic-header{border-bottom:1px solid var(--border);background:#fff;justify-content:space-between;align-items:center;padding:1rem 2rem;display:flex}.topic-logo{color:var(--primary);font-family:Plus Jakarta Sans,sans-serif;font-size:1.7rem;font-weight:800;text-decoration:none}.sidebar{border:1px solid var(--border);background:#fff;border-radius:20px;height:calc(100vh - 120px);padding:1.5rem;position:sticky;top:20px;overflow-y:auto}.sidebar input{border:1px solid var(--border);border-radius:12px;outline:none;width:100%;margin-bottom:1.25rem;padding:.85rem 1rem;font-size:.95rem}.sidebar input:focus{border-color:var(--primary)}.sidebar-title{color:var(--primary);margin-top:0;margin-bottom:1rem;font-size:1.4rem;font-weight:700}.topic-list{flex-direction:column;gap:.45rem;display:flex}.topic-item{cursor:pointer;color:var(--text);border-radius:10px;padding:.8rem 1rem;transition:all .2s}.topic-item:hover{background:#edf5ff}.topic-item.active{background:var(--primary);color:#fff;font-weight:600}.topic-item{justify-content:space-between;align-items:center;display:flex}.topic-lock{opacity:.8;font-size:.9rem}.content :not(pre)>code{color:var(--color-primary);background:#eef5ff;border-radius:6px;padding:.2rem .45rem;font-size:.95rem;font-weight:600}.content pre{color:var(--color-text);border:1px solid var(--color-border);background:#f8fbff;border-radius:12px;padding:1.25rem;line-height:1.7;overflow-x:auto}.content pre code{color:inherit;background:0 0;border-radius:0;padding:0;font-size:.95rem;font-weight:500}.breadcrumb{color:var(--text-light);margin-bottom:2rem;font-size:.95rem}.breadcrumb-link{color:var(--primary);cursor:pointer;font-weight:600}.breadcrumb-link:hover{text-decoration:underline}.breadcrumb-current{color:var(--text);font-weight:700}.topic-navigation{justify-content:space-between;margin-bottom:2rem;display:flex}.topic-navigation button{background:linear-gradient(135deg, var(--primary), var(--secondary));color:#fff;cursor:pointer;border:none;border-radius:12px;padding:.8rem 1.4rem;font-weight:600;transition:all .2s}.topic-navigation button:hover{transform:translateY(-2px);box-shadow:0 8px 18px #0b63ff2e}.content h1{color:var(--primary);margin-top:0;font-size:2.5rem}.content h2{color:var(--primary);margin-top:2.5rem}.content h3{margin-top:2rem}.content p{color:var(--text);line-height:1.8}.content ul,.content ol{padding-left:1.5rem;line-height:1.8}.content li{margin-bottom:.45rem}.content strong{color:var(--primary)}.content img{border:1px solid var(--border);border-radius:14px;width:100%;max-width:900px;height:auto;margin:2rem auto;display:block}.content table{border-collapse:collapse;width:100%;margin:2rem 0}.content th{background:var(--primary);color:#fff}.content td,.content th{border:1px solid var(--border);padding:.85rem}.content blockquote{border-left:5px solid var(--accent);color:var(--text-light);background:#f8fdff;margin:1.5rem 0;padding-left:1rem}.content code{background:#eef5ff;border-radius:6px;padding:.2rem .4rem;font-size:.95rem}.content pre{color:#fff;background:#0d1b2a;border-radius:12px;padding:1rem;overflow-x:auto}.topic-lock{margin-left:auto;font-size:.9rem}.sidebar{border:1px solid var(--border);background:#fff;border-radius:20px;align-self:start;max-height:calc(100vh - 120px);padding:1.5rem;position:sticky;top:20px;overflow-y:auto}.sidebar::-webkit-scrollbar{width:8px}.sidebar::-webkit-scrollbar-thumb{background:#c8dfff;border-radius:10px}.markdown-image{cursor:zoom-in;border-radius:10px;max-width:100%;height:auto;margin:24px auto;transition:transform .2s,box-shadow .2s;display:block}.markdown-image:hover{transform:scale(1.01)}.image-lightbox{z-index:9999;cursor:zoom-out;background:#0d1b2af0;justify-content:center;align-items:center;padding:40px;display:flex;position:fixed;inset:0}.image-lightbox-image{object-fit:contain;cursor:default;border-radius:8px;width:auto;max-width:95vw;height:auto;max-height:92vh;box-shadow:0 20px 60px #00000073}.image-lightbox-close{color:#fff;cursor:pointer;background:#ffffff1f;border:none;border-radius:50%;justify-content:center;align-items:center;width:44px;height:44px;font-size:32px;line-height:1;transition:background .2s,transform .2s;display:flex;position:absolute;top:20px;right:24px}.image-lightbox-close:hover{background:#ffffff38;transform:scale(1.05)}.topic-practice-card{border:1px solid var(--border);background:linear-gradient(135deg,#fff 0%,#eef7ff 100%);border-radius:20px;align-items:center;gap:1.5rem;margin-top:3rem;padding:1.75rem;display:flex;box-shadow:0 12px 30px #0b63ff14}.topic-practice-icon{background:linear-gradient(135deg, var(--primary), var(--secondary));border-radius:18px;flex-shrink:0;justify-content:center;align-items:center;width:64px;height:64px;font-size:1.8rem;display:flex}.topic-practice-content{flex:1;min-width:0}.topic-practice-label{color:var(--primary);letter-spacing:.08em;margin-bottom:.4rem;font-size:.75rem;font-weight:800;display:block}.topic-practice-content h2{margin:0 0 .45rem;font-size:1.3rem}.topic-practice-content p{color:var(--text-light);margin:0;line-height:1.6}.topic-practice-button{background:linear-gradient(135deg, var(--primary), var(--secondary));color:#fff;cursor:pointer;border:none;border-radius:12px;flex-shrink:0;padding:.85rem 1.2rem;font-size:.9rem;font-weight:700;transition:transform .2s,box-shadow .2s}.topic-practice-button:hover{transform:translateY(-2px);box-shadow:0 10px 22px #0b63ff33}.topic-solved-problems-card{background:linear-gradient(135deg,#fff,#f5fbff);border:1px solid #0b63ff29;border-radius:18px;align-items:center;gap:20px;margin-top:38px;padding:24px;display:flex;box-shadow:0 10px 28px #0d1b2a0f}.topic-solved-problems-icon{color:#fff;background:linear-gradient(135deg,#0b63ff,#22b7ff);border-radius:16px;flex:0 0 58px;justify-content:center;align-items:center;width:58px;height:58px;font-size:1.8rem;font-weight:700;display:flex}.topic-solved-problems-content{flex:1}.topic-solved-problems-label{color:#0b63ff;letter-spacing:.1em;margin-bottom:5px;font-size:.72rem;font-weight:800;display:block}.topic-solved-problems-content h2{color:#0d1b2a;margin:0 0 7px;font-size:1.35rem}.topic-solved-problems-content p{color:#5c6c7b;margin:0;line-height:1.6}.topic-solved-problems-button{color:#fff;cursor:pointer;border:0;border-radius:12px;flex-shrink:0;padding:12px 18px;font-weight:700;transition:transform .18s,box-shadow .18s;background:#0b63ff!important}.topic-solved-problems-button:hover{transform:translateY(-2px);box-shadow:0 8px 20px #0b63ff38}@media (width<=768px){.image-lightbox{padding:20px}.image-lightbox-image{border-radius:6px;max-width:96vw;max-height:88vh}.image-lightbox-close{width:40px;height:40px;font-size:28px;top:12px;right:12px}.topic-layout{grid-template-columns:1fr;gap:0;padding:1rem}.sidebar{display:none}.content{width:100%;min-width:0;padding:1.25rem}.breadcrumb{white-space:nowrap;margin-bottom:1rem;font-size:.85rem;overflow-x:auto}.topic-header{text-align:center;flex-direction:column;gap:1rem}.topic-navigation{flex-direction:column;gap:1rem}.topic-navigation button{white-space:normal;text-align:center;width:100%}.content h1{font-size:1.8rem}.content table{white-space:nowrap;border-collapse:collapse;display:block;overflow-x:auto}.content pre{-webkit-overflow-scrolling:touch;overflow-x:auto}.topic-practice-card{flex-direction:column;align-items:flex-start;gap:1rem;margin-top:2rem;padding:1.4rem}.topic-practice-icon{border-radius:15px;width:54px;height:54px;font-size:1.5rem}.topic-practice-content h2{font-size:1.15rem}.topic-practice-button{text-align:center;width:100%}.topic-solved-problems-card{flex-wrap:wrap;align-items:flex-start;padding:20px}.topic-solved-problems-content{min-width:calc(100% - 80px)}.topic-solved-problems-button{width:100%}}.back-to-top{background:linear-gradient(135deg, var(--primary), var(--secondary));color:#fff;cursor:pointer;z-index:1000;border:none;border-radius:50%;width:48px;height:48px;font-size:1.4rem;font-weight:700;transition:transform .2s;position:fixed;bottom:24px;right:24px;box-shadow:0 8px 18px #0b63ff40}.back-to-top:hover{transform:translateY(-2px)}@media (width<=768px){.back-to-top{width:44px;height:44px;bottom:16px;right:16px}}.premium-container{max-width:900px;margin:0 auto}.premium-title{text-align:center;margin-bottom:.5rem}.premium-subtitle{text-align:center;color:var(--color-text-secondary);margin-bottom:2rem}.plan-grid{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem;display:grid}.plan-card{flex-direction:column;display:flex}.plan-price{margin:.5rem 0 1rem;font-size:2rem;font-weight:700}.plan-features{flex:1;margin:0;padding-left:1.2rem}.plan-features li{margin-bottom:.75rem}.best-value{border:2px solid var(--color-primary)}.best-badge{background:var(--color-primary);color:#fff;border-radius:999px;margin-bottom:1rem;padding:.25rem .75rem;font-size:.8rem;display:inline-block}.active-card{text-align:center}._yearHeader_84b7d_1{padding:36px 8px 8px}._eyebrow_84b7d_5{font-family:var(--mono);color:var(--cyan);letter-spacing:.1em;text-transform:uppercase;margin:0 0 8px;font-size:12px}._yearHeader_84b7d_1 h2{font-family:var(--display);margin:0 0 8px;font-size:28px}._yearHeader_84b7d_1 p{color:var(--text-2);max-width:560px;margin:0;font-size:14px;line-height:1.6}._expList_84b7d_28{flex-direction:column;gap:10px;margin:28px 8px 60px;display:flex}._expRow_84b7d_35{background:var(--surface);border:1px solid var(--border);cursor:pointer;border-radius:10px;justify-content:space-between;align-items:center;padding:16px 18px;transition:border-color .15s,background .15s;display:flex}._expRow_84b7d_35:hover{border-color:var(--border-2);background:var(--surface-2)}._left_84b7d_52{align-items:center;gap:14px;display:flex}._expIdx_84b7d_58{font-family:var(--mono);color:var(--text-3);min-width:24px;font-size:11px}._expName_84b7d_65{font-size:14.5px;font-weight:500}._expStatus_84b7d_70{font-family:var(--mono);letter-spacing:.03em;border-radius:20px;padding:4px 10px;font-size:10.5px}._statusLive_84b7d_78{color:#06231c;background:var(--teal)}._statusSoon_84b7d_83{color:var(--text-2);background:var(--surface-3);border:1px solid var(--border-2)}._statusLocked_84b7d_89{color:#2a1f06;background:#e0a030}._simHeader_kuvxt_1{padding:36px 8px 20px}._eyebrow_kuvxt_5{font-family:var(--mono);color:var(--teal);letter-spacing:.1em;text-transform:uppercase;margin:0 0 8px;font-size:12px}._simHeader_kuvxt_1 h2{font-family:var(--display);margin:0;font-size:26px}._simWrap_kuvxt_20{grid-template-columns:1.05fr 1fr;gap:24px;margin:20px 8px 60px;display:grid}._simWrapSingle_kuvxt_27{grid-template-columns:1fr;gap:24px;margin:20px 8px 60px;display:grid}@media (width<=920px){._simWrap_kuvxt_20{grid-template-columns:1fr}}._panelTitle_kuvxt_40{font-family:var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--text-2);margin:0 0 12px;font-size:12px}._boardWrap_kuvxt_49,._croWrap_kuvxt_50{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px}._board_kuvxt_49{background:#ede6d6;border-radius:8px;padding:18px 16px;position:relative}._screenFrame_kuvxt_64{background:var(--surface-2);border:1px solid var(--border-2);border-radius:8px;padding:14px}._readoutRow_kuvxt_71{font-family:var(--mono);color:var(--cyan);opacity:.85;justify-content:space-between;margin-top:8px;font-size:11px;display:flex}._controls_kuvxt_81{grid-template-columns:1fr 1fr;gap:14px 20px;margin-top:18px;display:grid}._controlsSingleCol_kuvxt_88{grid-template-columns:1fr;gap:14px 20px;margin-top:18px;display:grid}._ctrl_kuvxt_95{flex-direction:column;gap:6px;display:flex}._ctrl_kuvxt_95 label{font-family:var(--mono);color:var(--text-2);justify-content:space-between;font-size:11px;display:flex}._ctrl_kuvxt_95 label b{color:var(--teal);font-weight:500}._slider_kuvxt_114{-webkit-appearance:none;background:var(--surface-3);border-radius:2px;outline:none;width:100%;height:3px}._slider_kuvxt_114::-webkit-slider-thumb{-webkit-appearance:none;background:var(--cyan);cursor:pointer;border:2px solid var(--surface);border-radius:50%;width:16px;height:16px}._waveSelect_kuvxt_133{flex-wrap:wrap;gap:6px;display:flex}._waveBtn_kuvxt_139{background:var(--surface-2);border:1px solid var(--border-2);color:var(--text-2);font-family:var(--mono);cursor:pointer;border-radius:6px;flex:1;padding:7px 0;font-size:11px}._waveBtnActive_kuvxt_151{border-color:var(--cyan);color:var(--cyan);background:#7fc3de}._fullRow_kuvxt_157{grid-column:1/-1}._note_kuvxt_161{color:var(--text-3);border-top:1px solid var(--border);margin-top:18px;padding-top:14px;font-size:12.5px;line-height:1.6}._readout_kuvxt_71{font-family:var(--mono);color:var(--cyan);font-size:13px;line-height:2.1}._adjustBox_kuvxt_177{border:1px solid var(--border-2);background:var(--surface-2);border-radius:8px;grid-template-columns:44px 1fr 44px;align-items:center;min-height:42px;display:grid;overflow:hidden}._adjustBox_kuvxt_177 button{height:100%;color:var(--text);cursor:pointer;background:0 0;border:none;font-size:20px}._adjustBox_kuvxt_177 button:hover{background:var(--surface-3)}._adjustBox_kuvxt_177 span{text-align:center;font-family:var(--mono);color:var(--text);font-size:13px}._hero_1aven_1{max-width:680px;padding:64px 8px 40px}._eyebrow_1aven_6{font-family:var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--cyan);margin:0 0 14px;font-size:12px}._hero_1aven_1 h1{font-family:var(--display);margin:0 0 16px;font-size:40px;font-weight:600;line-height:1.15}._gradientSpan_1aven_23{background:linear-gradient(90deg,#00e0b8,#22b7ff,#0b63ff);-webkit-text-fill-color:transparent;color:#0000;-webkit-background-clip:text;background-clip:text}._hero_1aven_1 p{color:var(--text-2);max-width:560px;margin:0;font-size:15px;line-height:1.7}._yearGrid_1aven_46{grid-template-columns:repeat(4,1fr);gap:18px;margin:36px 0 60px;display:grid}@media (width<=900px){._yearGrid_1aven_46{grid-template-columns:repeat(2,1fr)}}@media (width<=560px){._yearGrid_1aven_46{grid-template-columns:1fr}}._yearCard_1aven_65{background:var(--surface);border:1px solid var(--border);cursor:pointer;border-radius:14px;padding:24px 20px;transition:border-color .15s,transform .15s;position:relative;overflow:hidden}._yearCard_1aven_65:hover{border-color:var(--cyan);transform:translateY(-2px)}._yearCard_1aven_65:after{content:"";background:linear-gradient(90deg, var(--cyan), var(--teal));width:0%;height:2px;transition:width .2s;position:absolute;bottom:0;left:0}._yearCard_1aven_65:hover:after{width:100%}._num_1aven_96{font-family:var(--display);color:var(--surface-3);-webkit-text-stroke:1px var(--border-2);margin:0 0 18px;font-size:34px;font-weight:700}._yrTitle_1aven_105{font-family:var(--display);margin:0 0 6px;font-size:16px;font-weight:600}._yrDesc_1aven_112{color:var(--text-2);margin:0 0 14px;font-size:12.5px;line-height:1.5}._yrCount_1aven_119{font-family:var(--mono);color:var(--teal);font-size:11px}.eee-quiz-page{--quiz-primary:#0b63ff;--quiz-secondary:#22b7ff;--quiz-accent:#00e0b8;--quiz-text:#0d1b2a;--quiz-text-light:#5b6675;--quiz-background:#f5fbff;--quiz-surface:#fff;--quiz-border:#dcebff;--quiz-primary-soft:#0b63ff14;--quiz-secondary-soft:#22b7ff14;--quiz-accent-soft:#00e0b81a;background:radial-gradient(circle at 8% 5%, #22b7ff14, transparent 24%), radial-gradient(circle at 92% 10%, #00e0b80f, transparent 22%), var(--quiz-background);min-height:100vh;color:var(--quiz-text);padding:32px}.eee-quiz-header{justify-content:space-between;align-items:center;gap:20px;max-width:1200px;margin:0 auto 24px;display:flex}.eee-quiz-header h1{letter-spacing:-.025em;color:var(--quiz-text);margin:4px 0 0;font-size:30px;font-weight:800}.eee-quiz-eyebrow{letter-spacing:.08em;text-transform:uppercase;color:var(--quiz-primary);margin:0;font-size:13px;font-weight:800}.eee-back-button{border:1px solid var(--quiz-border);color:var(--quiz-text);cursor:pointer;background:#ffffffe6;border-radius:11px;padding:10px 16px;font-weight:700;transition:transform .2s,border-color .2s,box-shadow .2s,background .2s;box-shadow:0 4px 14px #0d1b2a0a}.eee-back-button:hover{background:#fff;border-color:#0b63ff59;transform:translateY(-1px);box-shadow:0 7px 18px #0b63ff14}.eee-back-button:focus-visible{outline-offset:3px;outline:3px solid #00e0b84d}.eee-quiz-progress-bar{background:#e5f0ff;border-radius:999px;max-width:1200px;height:9px;margin:0 auto;overflow:hidden}.eee-quiz-progress-fill{background:linear-gradient(90deg, var(--quiz-primary), var(--quiz-secondary), var(--quiz-accent));border-radius:inherit;height:100%;transition:width .25s;box-shadow:0 0 12px #22b7ff38}.eee-quiz-progress-text{max-width:1200px;color:var(--quiz-text-light);justify-content:space-between;gap:12px;margin:9px auto 24px;font-size:14px;font-weight:600;display:flex}.eee-quiz-layout{grid-template-columns:300px minmax(0,1fr);align-items:start;gap:24px;max-width:1200px;margin:0 auto;display:grid}.eee-question-sidebar{border:1px solid var(--quiz-border);background:#fffffff5;border-radius:18px;flex-direction:column;max-height:calc(100vh - 48px);padding:20px;display:flex;position:sticky;top:24px;overflow:hidden;box-shadow:0 10px 30px #0d1b2a0f}.eee-question-sidebar h2{color:var(--quiz-text);margin:0 0 16px;font-size:17px;font-weight:800}.eee-question-palette{scrollbar-width:thin;scrollbar-color:#0b63ff47 transparent;grid-template-columns:repeat(5,1fr);gap:8px;min-height:0;padding-right:8px;display:grid;overflow:hidden auto}.eee-question-palette::-webkit-scrollbar{width:6px}.eee-question-palette::-webkit-scrollbar-track{background:0 0}.eee-question-palette::-webkit-scrollbar-thumb{background:#0b63ff38;border-radius:999px}.eee-question-palette::-webkit-scrollbar-thumb:hover{background:#0b63ff61}.eee-question-number{aspect-ratio:1;border:1px solid var(--quiz-border);color:var(--quiz-text-light);cursor:pointer;background:#fff;border-radius:9px;font-weight:700;transition:background .15s,border-color .15s,color .15s,transform .15s,box-shadow .15s}.eee-question-number:hover{background:var(--quiz-primary-soft);color:var(--quiz-primary);border-color:#0b63ff59;transform:translateY(-1px)}.eee-question-number.answered{background:var(--quiz-accent-soft);color:#007f6a;border-color:#00e0b873}.eee-question-number.active{background:linear-gradient(135deg, var(--quiz-primary), var(--quiz-secondary));border-color:var(--quiz-primary);color:#fff;box-shadow:0 6px 14px #0b63ff38}.eee-question-number:focus-visible{outline-offset:2px;outline:3px solid #00e0b847}.eee-question-content{min-width:0}.eee-question-card{border:1px solid var(--quiz-border);background:#fffffffa;border-radius:20px;padding:30px;position:relative;overflow:hidden;box-shadow:0 12px 36px #0d1b2a11}.eee-question-card:before{content:"";background:linear-gradient(90deg, var(--quiz-primary), var(--quiz-secondary), var(--quiz-accent));width:100%;height:4px;position:absolute;top:0;left:0}.eee-question-meta{flex-wrap:wrap;gap:10px;margin-bottom:22px;display:flex}.eee-question-meta span{background:var(--quiz-primary-soft);color:var(--quiz-primary);text-transform:capitalize;border:1px solid #0b63ff14;border-radius:999px;padding:6px 11px;font-size:12px;font-weight:700}.eee-question-text{color:var(--quiz-text);margin:0 0 28px;font-size:21px;font-weight:650;line-height:1.6}.eee-answer-options{flex-direction:column;gap:12px;display:flex}.eee-answer-option{border:1px solid var(--quiz-border);width:100%;color:var(--quiz-text);text-align:left;cursor:pointer;background:#fff;border-radius:13px;align-items:center;gap:14px;padding:15px 16px;font-size:15px;line-height:1.5;transition:border-color .18s,background .18s,transform .18s,box-shadow .18s;display:flex;box-shadow:0 3px 10px #0d1b2a06}.eee-answer-option:hover{background:#f5fbffe6;border-color:#0b63ff66;transform:translateY(-1px);box-shadow:0 6px 16px #0b63ff12}.eee-option-key{width:36px;height:36px;color:var(--quiz-primary);background:#eef6ff;border-radius:50%;flex:0 0 36px;justify-content:center;align-items:center;font-weight:800;transition:background .18s,color .18s;display:inline-flex}.eee-answer-option.selected{border-color:var(--quiz-primary);background:var(--quiz-primary-soft);box-shadow:0 5px 16px #0b63ff14}.eee-answer-option.selected .eee-option-key{background:linear-gradient(135deg, var(--quiz-primary), var(--quiz-secondary));color:#fff}.eee-answer-option.correct{background:#00e0b814;border-color:#00b4918c}.eee-answer-option.correct .eee-option-key{background:var(--quiz-accent);color:#063d35}.eee-answer-option.incorrect{background:#fff5f5;border-color:#f4a6a6}.eee-answer-option.incorrect .eee-option-key{color:#fff;background:#dc3f4a}.eee-submit-row{justify-content:flex-end;margin-top:22px;display:flex}.eee-submit-answer{background:linear-gradient(135deg, var(--quiz-primary), var(--quiz-secondary));color:#fff;cursor:pointer;border:0;border-radius:12px;min-width:150px;padding:12px 21px;font-weight:700;transition:transform .2s,box-shadow .2s,opacity .2s;box-shadow:0 8px 20px #0b63ff2e}.eee-submit-answer:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 12px 26px #0b63ff40}.eee-submit-answer:disabled{opacity:.45;cursor:not-allowed;box-shadow:none}.eee-submit-answer:focus-visible{outline-offset:3px;outline:3px solid #00e0b84d}.eee-answer-feedback{border-radius:14px;margin-top:22px;padding:18px;line-height:1.65}.eee-answer-feedback h3{margin:0 0 8px;font-size:17px;font-weight:800}.eee-answer-feedback p{margin:6px 0 0}.eee-answer-feedback.correct{color:#086b5a;background:#00e0b814;border:1px solid #00b49159}.eee-answer-feedback.incorrect{color:#9b2631;background:#fff5f5;border:1px solid #f4b4b4}.eee-question-navigation{border-top:1px solid var(--quiz-border);justify-content:space-between;gap:14px;margin-top:30px;padding-top:22px;display:flex}.eee-question-navigation button,.eee-result-actions button,.eee-quiz-start button,.eee-quiz-message button{border:1px solid var(--quiz-border);color:var(--quiz-text);cursor:pointer;background:#fff;border-radius:11px;padding:11px 18px;font-weight:700;transition:transform .2s,background .2s,border-color .2s,box-shadow .2s}.eee-question-navigation button:hover:not(:disabled),.eee-result-actions button:hover:not(:disabled),.eee-quiz-start button:hover:not(:disabled),.eee-quiz-message button:hover:not(:disabled){background:var(--quiz-primary-soft);border-color:#0b63ff4d;transform:translateY(-1px)}.eee-question-navigation button:disabled,.eee-result-actions button:disabled{opacity:.4;cursor:not-allowed}.eee-question-navigation .primary,.eee-result-actions .primary,.eee-quiz-start .primary{border-color:var(--quiz-primary);background:linear-gradient(135deg, var(--quiz-primary), var(--quiz-secondary));color:#fff;box-shadow:0 7px 18px #0b63ff29}.eee-question-navigation .primary:hover:not(:disabled),.eee-result-actions .primary:hover:not(:disabled),.eee-quiz-start .primary:hover:not(:disabled){border-color:var(--quiz-primary);background:linear-gradient(135deg,#0958e8,#18a9f1);box-shadow:0 10px 24px #0b63ff3b}.eee-quiz-start,.eee-quiz-message{border:1px solid var(--quiz-border);text-align:center;background:#fff;border-radius:22px;max-width:620px;margin:80px auto;padding:38px;position:relative;overflow:hidden;box-shadow:0 16px 45px #0d1b2a14}.eee-quiz-start:before,.eee-quiz-message:before{content:"";background:linear-gradient(90deg, var(--quiz-primary), var(--quiz-secondary), var(--quiz-accent));width:100%;height:5px;position:absolute;top:0;left:0}.eee-quiz-start h1,.eee-quiz-message h2{color:var(--quiz-text);margin:8px 0 14px;font-weight:800}.eee-quiz-start p,.eee-quiz-message p{color:var(--quiz-text-light);line-height:1.7}.eee-quiz-start .primary{margin-top:12px}.eee-quiz-result{border:1px solid var(--quiz-border);text-align:center;background:#fff;border-radius:22px;max-width:760px;margin:60px auto;padding:38px;position:relative;overflow:hidden;box-shadow:0 16px 45px #0d1b2a14}.eee-quiz-result:before{content:"";background:linear-gradient(90deg, var(--quiz-primary), var(--quiz-secondary), var(--quiz-accent));width:100%;height:5px;position:absolute;top:0;left:0}.eee-quiz-result h1{color:var(--quiz-text);margin:8px 0 28px;font-weight:800}.eee-result-grid{grid-template-columns:repeat(4,1fr);gap:14px;display:grid}.eee-result-grid div{border:1px solid var(--quiz-border);background:linear-gradient(145deg,#fff,#f5fbff);border-radius:14px;padding:20px 10px;box-shadow:0 5px 15px #0d1b2a09}.eee-result-grid strong{color:var(--quiz-primary);margin-bottom:5px;font-size:25px;font-weight:800;display:block}.eee-result-grid span{color:var(--quiz-text-light);font-size:13px;font-weight:600}.eee-result-actions{justify-content:center;gap:12px;margin-top:28px;display:flex}.eee-quiz-error{color:#9b2631;background:#fff5f5;border:1px solid #f4b4b4;border-radius:11px;margin-bottom:18px;padding:13px 15px;font-size:14px}.eee-quiz-sidebar{align-self:start;max-height:calc(100vh - 180px);overflow:hidden auto}.eee-question-number.locked{color:#77838f;cursor:pointer;opacity:.72;background:#f3f6f8;border-color:#e0e7ec;border-radius:9px;position:relative}.eee-question-number.locked:hover{opacity:1;color:#0b63ff;background:#f5fbff;border-color:#22b7ff}.eee-lock-icon{pointer-events:none;margin-left:0;font-size:7px;line-height:1;position:absolute;bottom:5px;right:5px}.eee-premium-overlay{z-index:2000;-webkit-backdrop-filter:blur(4px);background:#0d1b2aa6;justify-content:center;align-items:center;padding:24px;display:flex;position:fixed;inset:0}.eee-premium-dialog{color:#0d1b2a;text-align:center;background:#f5fbff;border:1px solid #dcebff;border-radius:20px;width:min(100%,480px);padding:36px 30px;position:relative;box-shadow:0 24px 70px #0d1b2a47}.eee-premium-dialog h2{color:#0d1b2a;margin:8px 0 14px;font-size:24px;font-weight:800}.eee-premium-dialog p{color:#5b6675;margin:10px 0;line-height:1.7}.eee-premium-icon{margin-bottom:8px;font-size:2rem}.eee-premium-close{color:#0d1b2a;cursor:pointer;background:0 0;border:none;border-radius:50%;justify-content:center;align-items:center;width:36px;height:36px;padding:0;font-size:1.5rem;line-height:1;transition:background .2s,color .2s;display:flex;position:absolute;top:12px;right:14px}.eee-premium-close:hover{color:#0b63ff;background:#0b63ff14}.eee-premium-later{color:#0b63ff;cursor:pointer;background:0 0;border:none;margin:18px auto 0;padding:8px 12px;font-weight:700;display:block}.eee-premium-later:hover{text-decoration:underline}@media (width<=900px){.eee-quiz-page{padding:24px 18px}.eee-quiz-layout{grid-template-columns:1fr}.eee-question-sidebar{position:static}.eee-question-palette{grid-template-columns:repeat(10,1fr)}}@media (width<=768px){.eee-quiz-page{padding:18px 12px}.eee-quiz-header{flex-direction:column;align-items:flex-start}.eee-quiz-header h1{font-size:24px}.eee-back-button{width:100%}.eee-quiz-progress-text{font-size:12px}.eee-question-sidebar{border-radius:14px;padding:15px}.eee-question-palette{grid-template-columns:repeat(5,1fr)}.eee-question-card{border-radius:16px;padding:22px 16px}.eee-question-text{font-size:18px}.eee-question-meta{gap:7px;margin-bottom:18px}.eee-question-meta span{padding:5px 9px;font-size:11px}.eee-answer-option{padding:13px 12px}.eee-option-key{flex-basis:34px;width:34px;height:34px}.eee-submit-answer{width:100%}.eee-question-navigation{gap:10px}.eee-question-navigation button{flex:1;padding-left:8px;padding-right:8px}.eee-result-grid{grid-template-columns:repeat(2,1fr)}.eee-result-actions{flex-direction:column}.eee-result-actions button{width:100%}.eee-quiz-start,.eee-quiz-message,.eee-quiz-result{border-radius:18px;margin:30px auto;padding:26px 18px}.eee-premium-overlay{padding:16px}.eee-premium-dialog{border-radius:18px;padding:32px 20px 26px}.eee-premium-dialog h2{font-size:21px}}@font-face{font-display:block;font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(/assets/KaTeX_AMS-Regular-BQhdFMY1.woff2)format("woff2"),url(/assets/KaTeX_AMS-Regular-DMm9YOAa.woff)format("woff"),url(/assets/KaTeX_AMS-Regular-DRggAlZN.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Caligraphic-Bold-Dq_IR9rO.woff2)format("woff2"),url(/assets/KaTeX_Caligraphic-Bold-BEiXGLvX.woff)format("woff"),url(/assets/KaTeX_Caligraphic-Bold-ATXxdsX0.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Caligraphic-Regular-Di6jR-x-.woff2)format("woff2"),url(/assets/KaTeX_Caligraphic-Regular-CTRA-rTL.woff)format("woff"),url(/assets/KaTeX_Caligraphic-Regular-wX97UBjC.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Fraktur-Bold-CL6g_b3V.woff2)format("woff2"),url(/assets/KaTeX_Fraktur-Bold-BsDP51OF.woff)format("woff"),url(/assets/KaTeX_Fraktur-Bold-BdnERNNW.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Fraktur-Regular-CTYiF6lA.woff2)format("woff2"),url(/assets/KaTeX_Fraktur-Regular-Dxdc4cR9.woff)format("woff"),url(/assets/KaTeX_Fraktur-Regular-CB_wures.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Main-Bold-Cx986IdX.woff2)format("woff2"),url(/assets/KaTeX_Main-Bold-Jm3AIy58.woff)format("woff"),url(/assets/KaTeX_Main-Bold-waoOVXN0.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Main-BoldItalic-DxDJ3AOS.woff2)format("woff2"),url(/assets/KaTeX_Main-BoldItalic-SpSLRI95.woff)format("woff"),url(/assets/KaTeX_Main-BoldItalic-DzxPMmG6.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Main-Italic-NWA7e6Wa.woff2)format("woff2"),url(/assets/KaTeX_Main-Italic-BMLOBm91.woff)format("woff"),url(/assets/KaTeX_Main-Italic-3WenGoN9.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Main-Regular-B22Nviop.woff2)format("woff2"),url(/assets/KaTeX_Main-Regular-Dr94JaBh.woff)format("woff"),url(/assets/KaTeX_Main-Regular-ypZvNtVU.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Math-BoldItalic-CZnvNsCZ.woff2)format("woff2"),url(/assets/KaTeX_Math-BoldItalic-iY-2wyZ7.woff)format("woff"),url(/assets/KaTeX_Math-BoldItalic-B3XSjfu4.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Math-Italic-t53AETM-.woff2)format("woff2"),url(/assets/KaTeX_Math-Italic-DA0__PXp.woff)format("woff"),url(/assets/KaTeX_Math-Italic-flOr_0UB.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:700;src:url(/assets/KaTeX_SansSerif-Bold-D1sUS0GD.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Bold-DbIhKOiC.woff)format("woff"),url(/assets/KaTeX_SansSerif-Bold-CFMepnvq.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:italic;font-weight:400;src:url(/assets/KaTeX_SansSerif-Italic-C3H0VqGB.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Italic-DN2j7dab.woff)format("woff"),url(/assets/KaTeX_SansSerif-Italic-YYjJ1zSn.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:400;src:url(/assets/KaTeX_SansSerif-Regular-DDBCnlJ7.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Regular-CS6fqUqJ.woff)format("woff"),url(/assets/KaTeX_SansSerif-Regular-BNo7hRIc.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Script-Regular-D3wIWfF6.woff2)format("woff2"),url(/assets/KaTeX_Script-Regular-D5yQViql.woff)format("woff"),url(/assets/KaTeX_Script-Regular-C5JkGWo-.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size1-Regular-mCD8mA8B.woff2)format("woff2"),url(/assets/KaTeX_Size1-Regular-C195tn64.woff)format("woff"),url(/assets/KaTeX_Size1-Regular-Dbsnue_I.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size2;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size2-Regular-Dy4dx90m.woff2)format("woff2"),url(/assets/KaTeX_Size2-Regular-oD1tc_U0.woff)format("woff"),url(/assets/KaTeX_Size2-Regular-B7gKUWhC.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size3;font-style:normal;font-weight:400;src:url(data:font/woff2;base64,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)format("woff2"),url(/assets/KaTeX_Size3-Regular-CTq5MqoE.woff)format("woff"),url(/assets/KaTeX_Size3-Regular-DgpXs0kz.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size4;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size4-Regular-Dl5lxZxV.woff2)format("woff2"),url(/assets/KaTeX_Size4-Regular-BF-4gkZK.woff)format("woff"),url(/assets/KaTeX_Size4-Regular-DWFBv043.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Typewriter;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Typewriter-Regular-CO6r4hn1.woff2)format("woff2"),url(/assets/KaTeX_Typewriter-Regular-C0xS9mPB.woff)format("woff"),url(/assets/KaTeX_Typewriter-Regular-D3Ib7_Hf.ttf)format("truetype")}.katex{text-indent:0;text-rendering:auto;font:1.21em/1.2 KaTeX_Main,math,Times New Roman,serif;position:relative}.katex *{border-color:currentColor;-ms-high-contrast-adjust:none!important}.katex .katex-version:after{content:"0.19.0"}.katex .katex-mathml{clip-path:inset(50%);border:0;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}.katex .katex-html>.katex-newline{display:block}.katex .katex-base{white-space:nowrap;width:min-content;position:relative}.katex .katex-base,.katex .katex-strut{display:inline-block}.katex .textbf{font-weight:700}.katex .textit{font-style:italic}.katex .textrm{font-family:KaTeX_Main}.katex .textsf{font-family:KaTeX_SansSerif}.katex .texttt{font-family:KaTeX_Typewriter}.katex .mathnormal{font-family:KaTeX_Math;font-style:italic}.katex .mathit{font-family:KaTeX_Main;font-style:italic}.katex .mathrm{font-style:normal}.katex .mathbf{font-family:KaTeX_Main;font-weight:700}.katex .boldsymbol{font-family:KaTeX_Math;font-style:italic;font-weight:700}.katex .amsrm,.katex .mathbb,.katex .textbb{font-family:KaTeX_AMS}.katex .mathcal{font-family:KaTeX_Caligraphic}.katex .mathfrak,.katex .textfrak{font-family:KaTeX_Fraktur}.katex .mathboldfrak,.katex .textboldfrak{font-family:KaTeX_Fraktur;font-weight:700}.katex .mathtt{font-family:KaTeX_Typewriter}.katex .mathscr,.katex .textscr{font-family:KaTeX_Script}.katex .mathsf,.katex .textsf{font-family:KaTeX_SansSerif}.katex .mathboldsf,.katex .textboldsf{font-family:KaTeX_SansSerif;font-weight:700}.katex .mathitsf,.katex .mathsfit,.katex .textitsf{font-family:KaTeX_SansSerif;font-style:italic}.katex .mainrm{font-family:KaTeX_Main;font-style:normal}.katex .vlist-t{border-collapse:collapse;table-layout:fixed;display:inline-table}.katex .vlist-r{display:table-row}.katex .vlist{vertical-align:bottom;display:table-cell;position:relative}.katex .vlist>span{height:0;display:block;position:relative}.katex .vlist>span>span{display:inline-block}.katex .vlist>span>.pstrut{width:0;overflow:hidden}.katex .vlist-t2{margin-right:-2px}.katex .vlist-s{vertical-align:bottom;width:2px;min-width:2px;font-size:1px;display:table-cell}.katex .katex-vbox{flex-direction:column;align-items:baseline;display:inline-flex}.katex .katex-thinbox{flex-direction:row;width:0;max-width:0;display:inline-flex}.katex .msupsub{text-align:left}.katex .mfrac>span>span{text-align:center}.katex .mfrac .frac-line{border-bottom-style:solid;width:100%;display:inline-block}.katex .katex-hdashline,.katex .katex-hline,.katex .katex-overline .overline-line,.katex .katex-rule,.katex .katex-underline .underline-line,.katex .mfrac .frac-line{min-height:1px}.katex .mspace{display:inline-block}.katex .katex-smash{line-height:0;display:inline}.katex .clap,.katex .llap,.katex .rlap{width:0;position:relative}.katex .clap>.katex-inner,.katex .llap>.katex-inner,.katex .rlap>.katex-inner{position:absolute}.katex .clap>.katex-fix,.katex .llap>.katex-fix,.katex .rlap>.katex-fix{display:inline-block}.katex .llap>.katex-inner{right:0}.katex .clap>.katex-inner,.katex .rlap>.katex-inner{left:0}.katex .clap>.katex-inner>span{margin-left:-50%;margin-right:50%}.katex .katex-rule{border:0 solid;display:inline-block;position:relative}.katex .katex-hline,.katex .katex-overline .overline-line,.katex .katex-underline .underline-line{border-bottom-style:solid;width:100%;display:inline-block}.katex .katex-hdashline{border-bottom-style:dashed;width:100%;display:inline-block}.katex .sqrt>.katex-root{margin-left:.277778em;margin-right:-.555556em}.katex .fontsize-ensurer.reset-size1.size1,.katex .katex-sizing.reset-size1.size1{font-size:1em}.katex .fontsize-ensurer.reset-size1.size2,.katex .katex-sizing.reset-size1.size2{font-size:1.2em}.katex .fontsize-ensurer.reset-size1.size3,.katex .katex-sizing.reset-size1.size3{font-size:1.4em}.katex .fontsize-ensurer.reset-size1.size4,.katex .katex-sizing.reset-size1.size4{font-size:1.6em}.katex .fontsize-ensurer.reset-size1.size5,.katex .katex-sizing.reset-size1.size5{font-size:1.8em}.katex .fontsize-ensurer.reset-size1.size6,.katex .katex-sizing.reset-size1.size6{font-size:2em}.katex .fontsize-ensurer.reset-size1.size7,.katex .katex-sizing.reset-size1.size7{font-size:2.4em}.katex .fontsize-ensurer.reset-size1.size8,.katex .katex-sizing.reset-size1.size8{font-size:2.88em}.katex .fontsize-ensurer.reset-size1.size9,.katex .katex-sizing.reset-size1.size9{font-size:3.456em}.katex .fontsize-ensurer.reset-size1.size10,.katex .katex-sizing.reset-size1.size10{font-size:4.148em}.katex .fontsize-ensurer.reset-size1.size11,.katex .katex-sizing.reset-size1.size11{font-size:4.976em}.katex .fontsize-ensurer.reset-size2.size1,.katex .katex-sizing.reset-size2.size1{font-size:.833333em}.katex .fontsize-ensurer.reset-size2.size2,.katex .katex-sizing.reset-size2.size2{font-size:1em}.katex .fontsize-ensurer.reset-size2.size3,.katex .katex-sizing.reset-size2.size3{font-size:1.16667em}.katex .fontsize-ensurer.reset-size2.size4,.katex .katex-sizing.reset-size2.size4{font-size:1.33333em}.katex .fontsize-ensurer.reset-size2.size5,.katex .katex-sizing.reset-size2.size5{font-size:1.5em}.katex .fontsize-ensurer.reset-size2.size6,.katex .katex-sizing.reset-size2.size6{font-size:1.66667em}.katex .fontsize-ensurer.reset-size2.size7,.katex .katex-sizing.reset-size2.size7{font-size:2em}.katex .fontsize-ensurer.reset-size2.size8,.katex .katex-sizing.reset-size2.size8{font-size:2.4em}.katex .fontsize-ensurer.reset-size2.size9,.katex .katex-sizing.reset-size2.size9{font-size:2.88em}.katex .fontsize-ensurer.reset-size2.size10,.katex .katex-sizing.reset-size2.size10{font-size:3.45667em}.katex .fontsize-ensurer.reset-size2.size11,.katex .katex-sizing.reset-size2.size11{font-size:4.14667em}.katex .fontsize-ensurer.reset-size3.size1,.katex .katex-sizing.reset-size3.size1{font-size:.714286em}.katex .fontsize-ensurer.reset-size3.size2,.katex .katex-sizing.reset-size3.size2{font-size:.857143em}.katex .fontsize-ensurer.reset-size3.size3,.katex .katex-sizing.reset-size3.size3{font-size:1em}.katex .fontsize-ensurer.reset-size3.size4,.katex .katex-sizing.reset-size3.size4{font-size:1.14286em}.katex .fontsize-ensurer.reset-size3.size5,.katex .katex-sizing.reset-size3.size5{font-size:1.28571em}.katex .fontsize-ensurer.reset-size3.size6,.katex .katex-sizing.reset-size3.size6{font-size:1.42857em}.katex .fontsize-ensurer.reset-size3.size7,.katex .katex-sizing.reset-size3.size7{font-size:1.71429em}.katex .fontsize-ensurer.reset-size3.size8,.katex .katex-sizing.reset-size3.size8{font-size:2.05714em}.katex .fontsize-ensurer.reset-size3.size9,.katex .katex-sizing.reset-size3.size9{font-size:2.46857em}.katex .fontsize-ensurer.reset-size3.size10,.katex .katex-sizing.reset-size3.size10{font-size:2.96286em}.katex .fontsize-ensurer.reset-size3.size11,.katex .katex-sizing.reset-size3.size11{font-size:3.55429em}.katex .fontsize-ensurer.reset-size4.size1,.katex .katex-sizing.reset-size4.size1{font-size:.625em}.katex .fontsize-ensurer.reset-size4.size2,.katex .katex-sizing.reset-size4.size2{font-size:.75em}.katex .fontsize-ensurer.reset-size4.size3,.katex .katex-sizing.reset-size4.size3{font-size:.875em}.katex .fontsize-ensurer.reset-size4.size4,.katex .katex-sizing.reset-size4.size4{font-size:1em}.katex .fontsize-ensurer.reset-size4.size5,.katex .katex-sizing.reset-size4.size5{font-size:1.125em}.katex .fontsize-ensurer.reset-size4.size6,.katex .katex-sizing.reset-size4.size6{font-size:1.25em}.katex .fontsize-ensurer.reset-size4.size7,.katex .katex-sizing.reset-size4.size7{font-size:1.5em}.katex .fontsize-ensurer.reset-size4.size8,.katex .katex-sizing.reset-size4.size8{font-size:1.8em}.katex .fontsize-ensurer.reset-size4.size9,.katex .katex-sizing.reset-size4.size9{font-size:2.16em}.katex .fontsize-ensurer.reset-size4.size10,.katex .katex-sizing.reset-size4.size10{font-size:2.5925em}.katex .fontsize-ensurer.reset-size4.size11,.katex .katex-sizing.reset-size4.size11{font-size:3.11em}.katex .fontsize-ensurer.reset-size5.size1,.katex .katex-sizing.reset-size5.size1{font-size:.555556em}.katex .fontsize-ensurer.reset-size5.size2,.katex .katex-sizing.reset-size5.size2{font-size:.666667em}.katex .fontsize-ensurer.reset-size5.size3,.katex .katex-sizing.reset-size5.size3{font-size:.777778em}.katex .fontsize-ensurer.reset-size5.size4,.katex .katex-sizing.reset-size5.size4{font-size:.888889em}.katex .fontsize-ensurer.reset-size5.size5,.katex .katex-sizing.reset-size5.size5{font-size:1em}.katex .fontsize-ensurer.reset-size5.size6,.katex .katex-sizing.reset-size5.size6{font-size:1.11111em}.katex .fontsize-ensurer.reset-size5.size7,.katex .katex-sizing.reset-size5.size7{font-size:1.33333em}.katex .fontsize-ensurer.reset-size5.size8,.katex .katex-sizing.reset-size5.size8{font-size:1.6em}.katex .fontsize-ensurer.reset-size5.size9,.katex .katex-sizing.reset-size5.size9{font-size:1.92em}.katex .fontsize-ensurer.reset-size5.size10,.katex .katex-sizing.reset-size5.size10{font-size:2.30444em}.katex .fontsize-ensurer.reset-size5.size11,.katex .katex-sizing.reset-size5.size11{font-size:2.76444em}.katex .fontsize-ensurer.reset-size6.size1,.katex .katex-sizing.reset-size6.size1{font-size:.5em}.katex .fontsize-ensurer.reset-size6.size2,.katex .katex-sizing.reset-size6.size2{font-size:.6em}.katex .fontsize-ensurer.reset-size6.size3,.katex .katex-sizing.reset-size6.size3{font-size:.7em}.katex .fontsize-ensurer.reset-size6.size4,.katex .katex-sizing.reset-size6.size4{font-size:.8em}.katex .fontsize-ensurer.reset-size6.size5,.katex .katex-sizing.reset-size6.size5{font-size:.9em}.katex .fontsize-ensurer.reset-size6.size6,.katex .katex-sizing.reset-size6.size6{font-size:1em}.katex .fontsize-ensurer.reset-size6.size7,.katex .katex-sizing.reset-size6.size7{font-size:1.2em}.katex .fontsize-ensurer.reset-size6.size8,.katex .katex-sizing.reset-size6.size8{font-size:1.44em}.katex .fontsize-ensurer.reset-size6.size9,.katex .katex-sizing.reset-size6.size9{font-size:1.728em}.katex .fontsize-ensurer.reset-size6.size10,.katex .katex-sizing.reset-size6.size10{font-size:2.074em}.katex .fontsize-ensurer.reset-size6.size11,.katex .katex-sizing.reset-size6.size11{font-size:2.488em}.katex .fontsize-ensurer.reset-size7.size1,.katex .katex-sizing.reset-size7.size1{font-size:.416667em}.katex .fontsize-ensurer.reset-size7.size2,.katex .katex-sizing.reset-size7.size2{font-size:.5em}.katex .fontsize-ensurer.reset-size7.size3,.katex .katex-sizing.reset-size7.size3{font-size:.583333em}.katex .fontsize-ensurer.reset-size7.size4,.katex .katex-sizing.reset-size7.size4{font-size:.666667em}.katex .fontsize-ensurer.reset-size7.size5,.katex .katex-sizing.reset-size7.size5{font-size:.75em}.katex .fontsize-ensurer.reset-size7.size6,.katex .katex-sizing.reset-size7.size6{font-size:.833333em}.katex .fontsize-ensurer.reset-size7.size7,.katex .katex-sizing.reset-size7.size7{font-size:1em}.katex .fontsize-ensurer.reset-size7.size8,.katex .katex-sizing.reset-size7.size8{font-size:1.2em}.katex .fontsize-ensurer.reset-size7.size9,.katex .katex-sizing.reset-size7.size9{font-size:1.44em}.katex .fontsize-ensurer.reset-size7.size10,.katex .katex-sizing.reset-size7.size10{font-size:1.72833em}.katex .fontsize-ensurer.reset-size7.size11,.katex .katex-sizing.reset-size7.size11{font-size:2.07333em}.katex .fontsize-ensurer.reset-size8.size1,.katex .katex-sizing.reset-size8.size1{font-size:.347222em}.katex .fontsize-ensurer.reset-size8.size2,.katex .katex-sizing.reset-size8.size2{font-size:.416667em}.katex .fontsize-ensurer.reset-size8.size3,.katex .katex-sizing.reset-size8.size3{font-size:.486111em}.katex .fontsize-ensurer.reset-size8.size4,.katex .katex-sizing.reset-size8.size4{font-size:.555556em}.katex .fontsize-ensurer.reset-size8.size5,.katex .katex-sizing.reset-size8.size5{font-size:.625em}.katex .fontsize-ensurer.reset-size8.size6,.katex .katex-sizing.reset-size8.size6{font-size:.694444em}.katex .fontsize-ensurer.reset-size8.size7,.katex .katex-sizing.reset-size8.size7{font-size:.833333em}.katex .fontsize-ensurer.reset-size8.size8,.katex .katex-sizing.reset-size8.size8{font-size:1em}.katex .fontsize-ensurer.reset-size8.size9,.katex .katex-sizing.reset-size8.size9{font-size:1.2em}.katex .fontsize-ensurer.reset-size8.size10,.katex .katex-sizing.reset-size8.size10{font-size:1.44028em}.katex .fontsize-ensurer.reset-size8.size11,.katex .katex-sizing.reset-size8.size11{font-size:1.72778em}.katex .fontsize-ensurer.reset-size9.size1,.katex .katex-sizing.reset-size9.size1{font-size:.289352em}.katex .fontsize-ensurer.reset-size9.size2,.katex .katex-sizing.reset-size9.size2{font-size:.347222em}.katex .fontsize-ensurer.reset-size9.size3,.katex .katex-sizing.reset-size9.size3{font-size:.405093em}.katex .fontsize-ensurer.reset-size9.size4,.katex .katex-sizing.reset-size9.size4{font-size:.462963em}.katex .fontsize-ensurer.reset-size9.size5,.katex .katex-sizing.reset-size9.size5{font-size:.520833em}.katex .fontsize-ensurer.reset-size9.size6,.katex .katex-sizing.reset-size9.size6{font-size:.578704em}.katex .fontsize-ensurer.reset-size9.size7,.katex .katex-sizing.reset-size9.size7{font-size:.694444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .katex-sizing.reset-size9.size8{font-size:.833333em}.katex .fontsize-ensurer.reset-size9.size9,.katex .katex-sizing.reset-size9.size9{font-size:1em}.katex .fontsize-ensurer.reset-size9.size10,.katex .katex-sizing.reset-size9.size10{font-size:1.20023em}.katex .fontsize-ensurer.reset-size9.size11,.katex .katex-sizing.reset-size9.size11{font-size:1.43981em}.katex .fontsize-ensurer.reset-size10.size1,.katex .katex-sizing.reset-size10.size1{font-size:.24108em}.katex .fontsize-ensurer.reset-size10.size2,.katex .katex-sizing.reset-size10.size2{font-size:.289296em}.katex .fontsize-ensurer.reset-size10.size3,.katex .katex-sizing.reset-size10.size3{font-size:.337512em}.katex .fontsize-ensurer.reset-size10.size4,.katex .katex-sizing.reset-size10.size4{font-size:.385728em}.katex .fontsize-ensurer.reset-size10.size5,.katex .katex-sizing.reset-size10.size5{font-size:.433944em}.katex .fontsize-ensurer.reset-size10.size6,.katex .katex-sizing.reset-size10.size6{font-size:.48216em}.katex .fontsize-ensurer.reset-size10.size7,.katex .katex-sizing.reset-size10.size7{font-size:.578592em}.katex .fontsize-ensurer.reset-size10.size8,.katex .katex-sizing.reset-size10.size8{font-size:.694311em}.katex .fontsize-ensurer.reset-size10.size9,.katex .katex-sizing.reset-size10.size9{font-size:.833173em}.katex .fontsize-ensurer.reset-size10.size10,.katex .katex-sizing.reset-size10.size10{font-size:1em}.katex .fontsize-ensurer.reset-size10.size11,.katex .katex-sizing.reset-size10.size11{font-size:1.19961em}.katex .fontsize-ensurer.reset-size11.size1,.katex .katex-sizing.reset-size11.size1{font-size:.200965em}.katex .fontsize-ensurer.reset-size11.size2,.katex .katex-sizing.reset-size11.size2{font-size:.241158em}.katex .fontsize-ensurer.reset-size11.size3,.katex .katex-sizing.reset-size11.size3{font-size:.281351em}.katex .fontsize-ensurer.reset-size11.size4,.katex .katex-sizing.reset-size11.size4{font-size:.321543em}.katex .fontsize-ensurer.reset-size11.size5,.katex .katex-sizing.reset-size11.size5{font-size:.361736em}.katex .fontsize-ensurer.reset-size11.size6,.katex .katex-sizing.reset-size11.size6{font-size:.401929em}.katex .fontsize-ensurer.reset-size11.size7,.katex .katex-sizing.reset-size11.size7{font-size:.482315em}.katex .fontsize-ensurer.reset-size11.size8,.katex .katex-sizing.reset-size11.size8{font-size:.578778em}.katex .fontsize-ensurer.reset-size11.size9,.katex .katex-sizing.reset-size11.size9{font-size:.694534em}.katex .fontsize-ensurer.reset-size11.size10,.katex .katex-sizing.reset-size11.size10{font-size:.833601em}.katex .fontsize-ensurer.reset-size11.size11,.katex .katex-sizing.reset-size11.size11{font-size:1em}.katex .delimsizing.size1{font-family:KaTeX_Size1}.katex .delimsizing.size2{font-family:KaTeX_Size2}.katex .delimsizing.size3{font-family:KaTeX_Size3}.katex .delimsizing.size4{font-family:KaTeX_Size4}.katex .delimsizing.mult .delim-size1>span{font-family:KaTeX_Size1}.katex .delimsizing.mult .delim-size4>span{font-family:KaTeX_Size4}.katex .nulldelimiter{width:.12em;display:inline-block}.katex .delimcenter,.katex .op-symbol{position:relative}.katex .op-symbol.small-op{font-family:KaTeX_Size1}.katex .op-symbol.large-op{font-family:KaTeX_Size2}.katex .katex-accent>.vlist-t,.katex .op-limits>.vlist-t{text-align:center}.katex .katex-accent .accent-body{position:relative}.katex .katex-accent .accent-body:not(.accent-full){width:0}.katex .katex-overlay{display:block}.katex .mtable .vertical-separator{min-width:1px;display:inline-block}.katex .mtable .arraycolsep{display:inline-block}.katex .mtable .col-align-c>.vlist-t{text-align:center}.katex .mtable .col-align-l>.vlist-t{text-align:left}.katex .mtable .col-align-r>.vlist-t{text-align:right}.katex .svg-align{text-align:left}.katex svg{fill:currentColor;stroke:currentColor;height:inherit;width:100%;display:block;position:absolute}.katex svg path{stroke:none}.katex svg{fill-rule:nonzero;fill-opacity:1;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1}.katex img{border-style:none;min-width:0;max-width:none;min-height:0;max-height:none}.katex .katex-stretchy{width:100%;display:block;position:relative;overflow:hidden}.katex .katex-stretchy:after,.katex .katex-stretchy:before{content:""}.katex .hide-tail{width:100%;position:relative;overflow:hidden}.katex .halfarrow-left{width:50.2%;position:absolute;left:0;overflow:hidden}.katex .halfarrow-right{width:50.2%;position:absolute;right:0;overflow:hidden}.katex .brace-left{width:25.1%;position:absolute;left:0;overflow:hidden}.katex .brace-center{width:50%;position:absolute;left:25%;overflow:hidden}.katex .brace-right{width:25.1%;position:absolute;right:0;overflow:hidden}.katex .x-arrow-pad{padding:0 .5em}.katex .cd-arrow-pad{padding:0 .55556em 0 .27778em}.katex .mover,.katex .munder,.katex .x-arrow{text-align:center}.katex .boxpad{padding:0 .3em}.katex .fbox,.katex .fcolorbox{box-sizing:border-box;border:.04em solid}.katex .cancel-pad{padding:0 .2em}.katex .cancel-lap{margin-left:-.2em;margin-right:-.2em}.katex .katex-sout{border-bottom-style:solid;border-bottom-width:.08em}.katex .angl{box-sizing:border-box;border-top:.049em solid;border-right:.049em solid;margin-right:.03889em}.katex .anglpad{padding:0 .03889em}.katex .reflectbox{display:inline-block;transform:scaleX(-1)}.katex .eqn-num:before{content:"(" counter(katexEqnNo) ")";counter-increment:katexEqnNo}.katex .mml-eqn-num:before{content:"(" counter(mmlEqnNo) ")";counter-increment:mmlEqnNo}.katex .mtr-glue{width:50%}.katex .cd-vert-arrow{display:inline-block;position:relative}.katex .cd-label-left{text-align:left;display:inline-block;position:absolute;right:calc(50% + .3em)}.katex .cd-label-right{text-align:right;display:inline-block;position:absolute;left:calc(50% + .3em)}.katex-display{text-align:center;margin:1em 0;display:block}.katex-display>.katex{text-align:center;white-space:nowrap;display:block}.katex-display>.katex>.katex-html{display:block;position:relative}.katex-display>.katex>.katex-html>.katex-tag{position:absolute;right:0}.katex-display.leqno>.katex>.katex-html>.katex-tag{left:0;right:auto}.katex-display.fleqn>.katex{text-align:left;padding-left:2em}body{counter-reset:katexEqnNo mmlEqnNo}.solved-problems-section{border-top:1px solid #dceaf5;margin-top:48px;margin-bottom:36px;padding-top:34px}.solved-problems-heading{margin-bottom:24px}.solved-problems-eyebrow{color:#0b63ff;letter-spacing:.09em;margin-bottom:7px;font-size:.76rem;font-weight:800;display:block}.solved-problems-heading h2{color:#0d1b2a;margin:0;font-size:1.7rem;line-height:1.25}.solved-problems-heading p{color:#526474;max-width:680px;margin-top:8px;margin-bottom:0;line-height:1.65}.solved-problem-filters{flex-wrap:wrap;gap:9px;margin-bottom:22px;display:flex}.solved-filter{color:#405364;font:inherit;cursor:pointer;background:#fff;border:1px solid #cbddeb;border-radius:999px;padding:8px 14px;font-size:.88rem;font-weight:650;transition:border-color .18s,background .18s,color .18s,transform .18s}.solved-filter:hover{color:#0b63ff;border-color:#22b7ff;transform:translateY(-1px)}.solved-filter.active{color:#fff;background:#0b63ff;border-color:#0b63ff}.solved-problem-list{flex-direction:column;gap:13px;display:flex}.solved-problem-card{background:#fff;border:1px solid #d9e7f1;border-radius:16px;transition:border-color .2s,box-shadow .2s;overflow:hidden;box-shadow:0 4px 18px #0d1b2a0b}.solved-problem-card:hover{border-color:#b7d8ec}.solved-problem-card.open{border-color:#9fd9ef;box-shadow:0 8px 26px #0b63ff14}.solved-problem-summary{width:100%;color:inherit;text-align:left;font:inherit;cursor:pointer;background:0 0;border:0;grid-template-columns:42px minmax(0,1fr) 30px;align-items:center;gap:14px;padding:17px 18px;display:grid}.solved-problem-number{color:#0b63ff;background:#f0f8ff;border-radius:12px;justify-content:center;align-items:center;width:42px;height:42px;font-size:.95rem;font-weight:800;display:flex}.solved-problem-summary-text{min-width:0}.solved-problem-summary-text h3{color:#0d1b2a;margin:6px 0 0;font-size:1rem;line-height:1.4}.solved-problem-toggle{color:#0b63ff;background:#f2f8fc;border-radius:50%;justify-content:center;align-items:center;width:28px;height:28px;font-size:1.25rem;font-weight:500;display:flex}.solved-level-badge{letter-spacing:.02em;border-radius:999px;align-items:center;padding:4px 9px;font-size:.72rem;font-weight:800;line-height:1;display:inline-flex}.level-concept{color:#087b69;background:#e6fbf7}.level-standard{color:#086d9d;background:#eaf6ff}.level-university{color:#3158ad;background:#edf2ff}.level-advanced{color:#6144a8;background:#f1edff}.level-challenge{color:#a04d20;background:#fff0e8}.solved-problem-body{border-top:1px solid #e6eff5;padding:4px 22px 24px}.solved-problem-block{padding:22px 0}.solved-problem-block.solution{border-top:1px solid #e6eff5}.solved-block-label{color:#0b63ff;letter-spacing:.085em;margin-bottom:13px;font-size:.73rem;font-weight:850}.solved-markdown{color:#253746;line-height:1.75}.solved-markdown h3{color:#0d1b2a;margin:18px 0 10px;font-size:1.02rem}.solved-markdown p{margin:10px 0}.solved-markdown ul,.solved-markdown ol{padding-left:24px}.solved-markdown .katex-display{margin:12px 0;padding:8px 2px;overflow:auto hidden}.solved-final-answer{background:#f0fdf9;border:1px solid #a8e9dc;border-radius:14px;margin-top:4px;padding:18px 20px}.solved-final-answer .solved-block-label{color:#087b69}.solved-final-answer .solved-markdown{color:#0d443a}.solved-concept-takeaway{color:#314a5d;background:#f5fbff;border-left:4px solid #22b7ff;border-radius:0 12px 12px 0;gap:13px;margin-top:18px;padding:15px 17px;display:flex}.solved-takeaway-icon{flex:none;font-size:1.25rem}.solved-concept-takeaway strong{color:#0d1b2a}.solved-concept-takeaway p{margin:5px 0 0;line-height:1.6}.solved-problem-image{object-fit:contain;border:1px solid #dce8f1;border-radius:12px;max-width:100%;max-height:520px;margin:22px auto 0;display:block}.solved-problem-error,.solved-problem-empty,.solved-problem-loading{border-radius:12px;padding:14px 16px;font-size:.9rem}.solved-problem-error{color:#9a3434;background:#fff3f3;margin-bottom:15px}.solved-problem-empty{color:#526474;text-align:center;background:#f5fbff}.solved-problem-loading{color:#607484;border-top:1px solid #e6eff5}@media (width<=768px){.solved-problems-section{margin-top:38px;padding-top:28px}.solved-problems-heading h2{font-size:1.5rem}.solved-problem-summary{grid-template-columns:38px minmax(0,1fr) 28px;gap:11px;padding:15px 14px}.solved-problem-number{width:38px;height:38px}.solved-problem-body{padding:3px 17px 20px}}@media (width<=520px){.solved-problem-filters{scrollbar-width:thin;flex-wrap:nowrap;padding-bottom:5px;overflow-x:auto}.solved-filter{white-space:nowrap;flex:none}.solved-problem-summary{grid-template-columns:34px minmax(0,1fr) 25px;gap:9px;padding:14px 11px}.solved-problem-number{border-radius:10px;width:34px;height:34px;font-size:.85rem}.solved-problem-summary-text h3{font-size:.93rem}.solved-problem-toggle{width:25px;height:25px}.solved-problem-body{padding:2px 14px 18px}.solved-final-answer{padding:15px}.solved-concept-takeaway{padding:13px}.solved-markdown .katex-display{font-size:.92rem}}.solved-page{color:#0d1b2a;background:#f5fbff;min-height:100vh}.solved-page-container{width:min(1100px,100% - 40px);margin:0 auto;padding:32px 0 70px}.solved-page-breadcrumb{color:#526475;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:28px;font-size:.9rem;display:flex}.solved-page-breadcrumb button{color:#0b63ff;font:inherit;cursor:pointer;background:0 0;border:0;padding:0}.solved-page-breadcrumb button:hover{text-decoration:underline}.solved-page-hero{background:linear-gradient(135deg,#fff 0%,#f5fbff 58%,#00e0b814 100%);border:1px solid #0b63ff24;border-radius:24px;margin-bottom:34px;padding:38px 40px;position:relative;box-shadow:0 14px 40px #0d1b2a12}.solved-page-label{color:#0b63ff;letter-spacing:.12em;margin-bottom:10px;font-size:.76rem;font-weight:800}.solved-page-hero h1{color:#0d1b2a;margin:0;font-size:clamp(2rem,4vw,3rem);line-height:1.15}.solved-page-subject{color:#0b63ff;margin:10px 0 0;font-size:1.05rem;font-weight:700}.solved-page-description{color:#526475;max-width:680px;margin:20px 0 26px;font-size:1rem;line-height:1.75}.solved-page-topic-button,.solved-page-back-button{color:#0b63ff;cursor:pointer;background:#fff;border:1px solid #0b63ff33;border-radius:12px;padding:10px 16px;font-weight:700;transition:transform .18s,box-shadow .18s,border-color .18s}.solved-page-topic-button:hover,.solved-page-back-button:hover{border-color:#0b63ff;transform:translateY(-1px);box-shadow:0 8px 20px #0b63ff1a}.solved-browser-section{margin-top:36px}.solved-browser-heading{margin-bottom:24px}.solved-browser-heading h2{color:#0d1b2a;margin:0 0 8px;font-size:1.55rem}.solved-browser-heading p{color:#5b6675;margin:0;line-height:1.6}.solved-subject-grid{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;display:grid}.solved-subject-card{color:#0d1b2a;text-align:left;min-height:175px;font:inherit;cursor:pointer;background:linear-gradient(145deg,#fff 0%,#f5fbff 100%);border:1px solid #0b63ff24;border-radius:18px;align-items:flex-start;gap:16px;padding:22px;transition:transform .2s,border-color .2s,box-shadow .2s;display:flex;box-shadow:0 7px 22px #0d1b2a0d}.solved-subject-card:hover{border-color:#0b63ff66;transform:translateY(-4px);box-shadow:0 14px 30px #0b63ff1a}.solved-subject-card:focus-visible{outline-offset:3px;outline:3px solid #00e0b84d}.solved-subject-icon{color:#fff;background:linear-gradient(135deg,#0b63ff,#22b7ff);border-radius:14px;flex:0 0 50px;justify-content:center;align-items:center;width:50px;height:50px;font-size:1.4rem;font-weight:800;display:flex}.solved-subject-content{flex-direction:column;flex:1;min-width:0;min-height:130px;display:flex}.solved-subject-content h3{color:#0d1b2a;margin:2px 0 10px;font-size:1.1rem;line-height:1.35}.solved-subject-content p{color:#5b6675;margin:0 0 16px;font-size:.9rem;line-height:1.55}.solved-subject-content span{color:#0b63ff;margin-top:auto;font-size:.9rem;font-weight:700}.solved-topic-grid{grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:18px;display:grid}.solved-topic-card{color:#0d1b2a;text-align:left;min-height:118px;font:inherit;cursor:pointer;background:linear-gradient(145deg,#fff 0%,#f5fbff 100%);border:1px solid #0b63ff24;border-radius:18px;align-items:center;gap:16px;padding:20px;transition:transform .2s,border-color .2s,box-shadow .2s;display:flex;position:relative;box-shadow:0 7px 22px #0d1b2a0d}.solved-topic-card:hover{border-color:#0b63ff66;transform:translateY(-3px);box-shadow:0 13px 28px #0b63ff1a}.solved-topic-card:focus-visible{outline-offset:3px;outline:3px solid #00e0b84d}.solved-topic-number{color:#fff;letter-spacing:.04em;background:linear-gradient(135deg,#0b63ff,#22b7ff);border-radius:15px;flex:0 0 52px;justify-content:center;align-items:center;width:52px;height:52px;font-size:.95rem;font-weight:800;display:flex;box-shadow:0 6px 16px #0b63ff26}.solved-topic-content{flex-direction:column;flex:1;min-width:0;display:flex}.solved-topic-content h3{color:#0d1b2a;overflow-wrap:anywhere;margin:0 0 9px;font-size:1.05rem;line-height:1.4}.solved-topic-content span{color:#0b63ff;font-size:.88rem;font-weight:700}.katex-display{text-align:center;max-width:100%;margin:16px 0;padding:12px 4px;display:block;overflow:auto hidden}.katex-display>.katex{white-space:nowrap;max-width:none;display:inline-block}.katex .mfrac .frac-line{border-bottom-width:.05em}.katex .mfrac .vlist-t{line-height:1.4}.katex-display{margin:20px 0;padding:12px 4px;overflow:auto hidden}.solved-topic-lock{background:#0b63ff12;border-radius:50%;flex:0 0 34px;justify-content:center;align-items:center;width:34px;height:34px;font-size:.9rem;display:flex}@media (width<=900px){.solved-subject-grid,.solved-topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=768px){.solved-page-container{width:min(100% - 24px,1100px);padding-top:20px}.solved-page-hero{border-radius:18px;padding:28px 22px}.solved-page-hero h1{font-size:1.9rem}.solved-page-description{font-size:.95rem}.solved-browser-section{margin-top:28px}.solved-subject-grid{grid-template-columns:1fr;gap:14px}.solved-subject-card{min-height:0;padding:18px}.solved-subject-icon{border-radius:13px;flex-basis:46px;width:46px;height:46px}.solved-subject-content{min-height:115px}.solved-topic-grid{grid-template-columns:1fr;gap:14px}.solved-topic-card{min-height:100px;padding:17px}.solved-topic-number{border-radius:13px;flex-basis:46px;width:46px;height:46px;font-size:.85rem}.solved-topic-content h3{font-size:1rem}.solved-topic-lock{flex-basis:32px;width:32px;height:32px}}@media (width<=480px){.solved-page-container{width:min(100% - 18px,1100px)}.solved-page-breadcrumb{font-size:.82rem}.solved-page-hero{padding:24px 18px}}.eee-profile-page{width:100%;max-width:1100px;color:var(--color-text-primary,#0d1b2a);margin:0 auto;padding:12px 24px 60px}.eee-profile-heading{align-items:center;gap:20px;margin-bottom:30px;display:flex}.eee-profile-avatar{color:#fff;background:linear-gradient(135deg,#0b63ff,#22b7ff);border-radius:22px;flex-shrink:0;justify-content:center;align-items:center;width:76px;height:76px;font-size:32px;font-weight:800;display:flex;box-shadow:0 10px 25px #0b63ff29}.eee-profile-heading h1{color:#0d1b2a;margin:0 0 6px;font-size:clamp(26px,3vw,36px)}.eee-profile-heading p,.eee-profile-card-heading p{color:#64748b;margin:0;line-height:1.6}.eee-profile-grid{grid-template-columns:repeat(2,minmax(0,1fr));align-items:start;gap:24px;display:grid}.eee-profile-card{background:#fff;border:1px solid #e1eaf5;border-radius:22px;min-width:0;padding:28px;box-shadow:0 8px 28px #0d1b2a0b}.eee-profile-card-heading{align-items:center;gap:14px;margin-bottom:28px;display:flex}.eee-profile-section-icon{background:#eef5ff;border-radius:15px;flex-shrink:0;justify-content:center;align-items:center;width:48px;height:48px;font-size:22px;display:flex}.eee-profile-card-heading h2{color:#0d1b2a;margin:0 0 4px;font-size:19px}.eee-profile-card-heading p{font-size:13px}.eee-profile-field{flex-direction:column;gap:9px;margin-bottom:20px;display:flex}.eee-profile-field label{color:#26384e;font-size:14px;font-weight:700}.eee-profile-field input{box-sizing:border-box;color:#0d1b2a;width:100%;font:inherit;background:#fff;border:1px solid #d7e3f1;border-radius:11px;outline:none;padding:13px 15px;font-size:14px;transition:border-color .2s,box-shadow .2s}.eee-profile-field input:focus{border-color:#0b63ff;box-shadow:0 0 0 3px #0b63ff1a}.eee-profile-field input:disabled{color:#64748b;cursor:not-allowed;background:#f5f8fc}.eee-profile-field small{color:#8190a5;font-size:12px}.eee-profile-button{color:#fff;min-height:44px;font:inherit;cursor:pointer;background:linear-gradient(135deg,#0b63ff,#0875dc);border:none;border-radius:11px;justify-content:center;align-items:center;padding:11px 22px;font-size:14px;font-weight:700;text-decoration:none;transition:transform .2s,box-shadow .2s;display:inline-flex}.eee-profile-button:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 8px 20px #0b63ff33}.eee-profile-button:disabled{opacity:.55;cursor:not-allowed}.eee-profile-subscription{grid-column:1/-1}.eee-profile-subscription-top{background:#f5fbff;border:1px solid #dbeafe;border-radius:14px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;padding:20px;display:flex}.eee-profile-subscription-top h3{color:#0d1b2a;margin:0;font-size:20px}.eee-profile-status{border-radius:999px;padding:7px 13px;font-size:12px;font-weight:800;display:inline-flex}.eee-profile-status.active{color:#166534;background:#dcfce7}.eee-profile-status.inactive{color:#475569;background:#e9eef5}.eee-profile-subscription-details{grid-template-columns:repeat(3,minmax(0,1fr));gap:15px;margin:22px 0;display:grid}.eee-profile-subscription-details>div{border:1px solid #e3eaf3;border-radius:13px;flex-direction:column;gap:10px;padding:20px;display:flex}.eee-profile-subscription-details span{color:#64748b;font-size:13px}.eee-profile-subscription-details strong{color:#0d1b2a;overflow-wrap:anywhere;font-size:17px}.eee-profile-upgrade{width:fit-content}.eee-profile-error{color:#b91c1c;font-size:14px}@media (width<=768px){.eee-profile-page{padding:8px 14px 40px}.eee-profile-grid{grid-template-columns:1fr;gap:18px}.eee-profile-card{border-radius:18px;padding:20px}.eee-profile-heading{gap:14px}.eee-profile-avatar{border-radius:17px;width:60px;height:60px;font-size:25px}.eee-profile-subscription-details{grid-template-columns:1fr}}
