@import "https://fonts.googleapis.com/css2?family=Almarai:wght@400;700;800&family=Tajawal:wght@300;400;500;700;800&family=Inter:wght@300;400;500;600;700&display=swap";:root{--color-primary:#0f4c3a;--color-primary-light:#166a51;--color-primary-dark:#093327;--color-primary-ghost:#0f4c3a14;--color-accent:#10b981;--color-accent-light:#34d399;--color-accent-dark:#059669;--color-accent-blue:#14b8a6;--color-accent-cyan:#06b6d4;--color-warning:#d97706;--color-warning-light:#f59e0b;--color-danger:#ef4444;--color-danger-light:#fca5a5;--color-success:#10b981;--color-bg:#f8fafc;--color-surface:#fff;--color-text-main:#0f172a;--color-text-muted:#475569;--color-border:#e2e8f0;--font-family:"Tajawal", "Inter", sans-serif;--font-heading:"Almarai", "Tajawal", sans-serif;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000000d, 0 2px 4px -2px #0000000d;--shadow-lg:0 10px 15px -3px #0f4c3a0f, 0 4px 6px -4px #0f4c3a0a;--radius-sm:.375rem;--radius-md:.75rem;--radius-lg:1.25rem;--transition:all .3s cubic-bezier(.4, 0, .2, 1);--color-heading:#093327;--color-primary-ink:#0f4c3a;--navbar-bg:#fffc;--navbar-border:var(--color-border);--surface-glass:#ffffffeb;--surface-glass-strong:#ffffffe0;--surface-solid:#fff;--input-bg:#fffffff0;--row-hover:#f8fafccc;--bubble-warm:#fffaf0;--soft-tint:#0f4c3a0d;--progress-track:#0f4c3a26;--bg-canvas:#f3f9f6;--hero-bg:linear-gradient(135deg, var(--surface-glass) 0%, #f7fffbf5 45%, #f1fdfae0 100%);--section-alt-bg:#fff;--cell-art-bg:radial-gradient(circle at 35% 35%, #ffffffe0 0%, #f0fff9cc 22%, #fffffff0 58%, #10b98108 100%);--cell-art-border:#0f4c3a1f;--footer-bg:#093327}[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--color-bg:#0c1420;--color-surface:#14212f;--color-text-main:#e6edf5;--color-text-muted:#9db0c3;--color-border:#263b52;--color-heading:#d6f5e8;--color-primary-ink:#5eead4;--color-accent-dark:#34d399;--color-warning:#fbbf24;--color-danger:#f87171;--navbar-bg:#0c1420d1;--navbar-border:#263b52e6;--surface-glass:#14212feb;--surface-glass-strong:#14212fe0;--surface-solid:#16273a;--input-bg:#091019a6;--row-hover:#24364c8c;--bubble-warm:#2e2718;--soft-tint:#6ee7b714;--progress-track:#6ee7b738;--bg-canvas:#0b1420;--hero-bg:linear-gradient(135deg, #0c1420b8 0%, #0d1a22eb 45%, #0b191ee0 100%);--section-alt-bg:#0d1622;--cell-art-bg:radial-gradient(circle at 35% 35%, #213346f2 0%, #152434e6 30%, #0e1925f5 70%, #10b9810d 100%);--cell-art-border:#6ee7b747;--footer-bg:#0c1420}[data-theme=dark] select,[data-theme=dark] select option{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}[data-theme=dark] select{background-color:var(--input-bg)!important;color:var(--color-text-main)!important;border-color:var(--color-border)!important}[data-theme=dark] select option{background-color:var(--surface-solid)!important;color:var(--color-text-main)!important}[data-theme=dark] textarea,[data-theme=dark] .form-input,[data-theme=dark] .written-answer{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}[data-theme=dark] .footer{color:#ffffffd9}[data-theme=dark] .footer h3,[data-theme=dark] .footer h4{color:#fff}[data-theme=dark] .footer-link{color:#ffffffb3}[data-theme=dark]{--shadow-sm:0 1px 2px 0 #0006;--shadow-md:0 4px 6px -1px #00000073, 0 2px 4px -2px #0006;--shadow-lg:0 10px 15px -3px #00000080, 0 4px 6px -4px #00000073;--color-status-editable:#34d399;--color-status-locked:#9ca3af;--color-status-correct:#34d399;--color-timer-warning:#fbbf24;--color-timer-danger:#f87171}.theme-toggle{border:1px solid var(--color-border);background:var(--surface-glass-strong);width:2.65rem;height:2.65rem;color:var(--color-primary-ink);cursor:pointer;transition:var(--transition);border-radius:50%;justify-content:center;align-items:center;font-size:1.05rem;display:inline-flex;box-shadow:0 8px 18px #0f172a0f}.theme-toggle:hover{border-color:#10b98166;transform:scale(1.06)}.theme-toggle .ti-moon,[data-theme=dark] .theme-toggle .ti-sun{display:none}[data-theme=dark] .theme-toggle .ti-moon{display:inline}@media (width<=480px){.theme-toggle{flex:none;width:2.5rem;height:2.5rem}}*,:before,:after{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background:var(--bg-canvas);color:var(--color-text-main);text-align:right;isolation:isolate;direction:rtl;flex-direction:column;min-height:100vh;line-height:1.6;display:flex;position:relative;overflow-x:clip}a{color:inherit;transition:var(--transition);text-decoration:none}ul{list-style:none}img{max-width:100%;height:auto;display:block}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 1.5rem}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);color:var(--color-heading);font-weight:700;line-height:1.3}.text-center{text-align:center}.text-muted{color:var(--color-text-muted)}.navbar{background:var(--navbar-bg);border-bottom:1px solid var(--navbar-border);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);z-index:100;padding:1rem 0;position:sticky;top:0;box-shadow:0 10px 30px #0f172a0d}.scroll-progress{z-index:200;background:var(--progress-track);pointer-events:none;height:4px;position:fixed;top:0;left:0;right:0}.scroll-progress-fill{background:var(--color-primary-ink);width:100%;height:100%;transform:scaleX(var(--scroll-progress-p,0));transform-origin:0;will-change:transform}html[dir=rtl] .scroll-progress-fill{transform-origin:100%}.navbar .container{justify-content:space-between;align-items:center;display:flex}.brand{color:var(--color-primary-ink);letter-spacing:.01em;align-items:center;gap:.5rem;font-size:1.5rem;font-weight:800;display:flex}.brand-icon{background:var(--color-primary);color:#fff;border-radius:.9rem;justify-content:center;align-items:center;width:2.25rem;height:2.25rem;font-size:1.25rem;display:flex;box-shadow:0 10px 24px #0f4c3a2e}.nav-links{align-items:center;gap:1.5rem;display:flex}.nav-link{color:var(--color-text-muted);padding:.25rem 0;font-size:1rem;font-weight:500;position:relative}.nav-link:hover,.nav-link.active{color:var(--color-primary-ink)}.nav-link:after{content:"";background-color:var(--color-primary-ink);width:0;height:2px;transition:var(--transition);position:absolute;bottom:0;left:0}.nav-link:hover:after,.nav-link.active:after{width:100%}.nav-actions{align-items:center;gap:1rem;display:flex}.nav-auth-container{align-items:center;gap:.6rem;display:inline-flex}.nav-toggle{color:var(--color-text-main);cursor:pointer;background:0 0;border:none;font-size:1.5rem;display:none}.mobile-drawer{background-color:var(--color-surface);z-index:1000;flex-direction:column;gap:2rem;width:280px;padding:2rem 1.5rem;transition:right .3s ease-in-out;display:flex;position:fixed;top:0;bottom:0;right:-300px;box-shadow:-4px 0 15px #0000001a}.mobile-drawer.open{right:0}.mobile-drawer-header{border-bottom:1px solid var(--color-border);justify-content:space-between;align-items:center;padding-bottom:1rem;display:flex}.mobile-drawer-close{cursor:pointer;color:var(--color-text-muted);background:0 0;border:none;font-size:1.5rem}.mobile-links{flex-direction:column;gap:1.25rem;display:flex}.mobile-auth-container,.mobile-auth-minimal{gap:.75rem;display:grid}.btn-login-minimal,.btn-signup-minimal{font-family:var(--font-family);border-radius:var(--radius-md);cursor:pointer;transition:var(--transition);white-space:nowrap;text-align:center;border:1px solid #0000;justify-content:center;align-items:center;gap:.5rem;padding:.6rem 1.25rem;font-size:.9rem;font-weight:600;text-decoration:none;display:inline-flex}.btn-login-minimal{background-color:var(--color-primary-ink);color:#fff}.btn-login-minimal:hover{background-color:var(--color-primary-light);transform:translateY(-2px);box-shadow:0 4px 12px #0f4c3a40}.btn-signup-minimal{background-color:var(--color-surface);color:var(--color-primary-ink);border:1px solid var(--color-primary-ink)}.btn-signup-minimal:hover{background-color:var(--color-bg);transform:translateY(-2px);box-shadow:0 4px 12px #0f4c3a26}.mobile-link{border-bottom:1px solid #0000;padding:.5rem 0;font-size:1.1rem;font-weight:500}.mobile-link:hover,.mobile-link.active{color:var(--color-primary-ink);border-bottom-color:var(--color-border)}.drawer-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:999;opacity:0;pointer-events:none;background-color:#0f172a66;transition:opacity .3s;position:fixed;inset:0}.drawer-overlay.show{opacity:1;pointer-events:auto}.btn{font-family:var(--font-family);border-radius:var(--radius-md);cursor:pointer;transition:var(--transition);border:1px solid #0000;justify-content:center;align-items:center;gap:.5rem;padding:.625rem 1.25rem;font-size:.95rem;font-weight:600;display:inline-flex}.btn-primary{background-color:var(--color-primary-ink);color:#fff}.btn-primary:hover{background-color:var(--color-primary-light);transform:translateY(-1px)}.btn-secondary{background-color:var(--color-surface);color:var(--color-primary-ink);border-color:var(--color-primary-ink)}.btn-secondary:hover{background-color:var(--color-bg);transform:translateY(-1px)}#teacher-quiz-builder{color:#12352d!important;background-color:#eaf7f2!important;border-color:#b8ddd0!important}#teacher-quiz-builder h2,#teacher-quiz-builder h3{color:#0b4f3a!important}#teacher-quiz-builder label,#teacher-quiz-builder p,#teacher-quiz-builder .muted{color:#42665c!important}#teacher-quiz-builder label{color:#173f34!important}#teacher-quiz-builder .form-input,#teacher-quiz-builder select,#teacher-quiz-builder textarea{color:#173f34!important;background-color:#fbfffd!important;border-color:#9bc9ba!important}#teacher-quiz-builder .form-input::placeholder,#teacher-quiz-builder textarea::placeholder{opacity:.8;color:#6b8d82!important}#teacher-quiz-builder .form-input:focus,#teacher-quiz-builder select:focus,#teacher-quiz-builder textarea:focus{outline:none;border-color:#0f9f7b!important;box-shadow:0 0 0 3px #0f9f7b38!important}#teacher-quiz-builder hr{border-top-color:#b8ddd0!important}#teacher-quiz-builder #quiz-lessons-checkboxes,#teacher-quiz-builder .staged-card{background-color:#dff1e9!important;border-color:#a8d2c2!important}#teacher-quiz-builder .btn-secondary{color:#0b5f48!important;background-color:#f5fffb!important;border-color:#18866b!important}#teacher-quiz-builder .btn-secondary:hover{background-color:#ccecdf!important}#teacher-quiz-builder #btn-publish-quiz{color:#fff;background-color:#087f68!important;border-color:#087f68!important}#teacher-quiz-builder #btn-publish-quiz:hover{background-color:#0fb898!important;border-color:#0fb898!important}[data-theme=dark] #teacher-quiz-builder{color:#e3f6ef!important;background-color:#102a2a!important;border-color:#285b55!important}[data-theme=dark] #teacher-quiz-builder h2,[data-theme=dark] #teacher-quiz-builder h3{color:#b9f1df!important}[data-theme=dark] #teacher-quiz-builder label{color:#d8eee7!important}[data-theme=dark] #teacher-quiz-builder p,[data-theme=dark] #teacher-quiz-builder .muted{color:#9fc8ba!important}[data-theme=dark] #teacher-quiz-builder .form-input,[data-theme=dark] #teacher-quiz-builder select,[data-theme=dark] #teacher-quiz-builder textarea{color:#e3f6ef!important;background-color:#0b1f26!important;border-color:#32685f!important}[data-theme=dark] #teacher-quiz-builder .form-input::placeholder,[data-theme=dark] #teacher-quiz-builder textarea::placeholder{color:#7fa99c!important}[data-theme=dark] #teacher-quiz-builder #quiz-lessons-checkboxes,[data-theme=dark] #teacher-quiz-builder .staged-card{background-color:#173936!important;border-color:#32685f!important}[data-theme=dark] #teacher-quiz-builder .btn-secondary{color:#9cebd4!important;background-color:#15332f!important;border-color:#55cdb0!important}[data-theme=dark] #teacher-quiz-builder .btn-secondary:hover{background-color:#1c5148!important}[data-theme=dark] #teacher-quiz-builder #btn-publish-quiz{color:#073b35!important;background-color:#2dd4bf!important;border-color:#2dd4bf!important}[data-theme=dark] #teacher-quiz-builder #btn-publish-quiz:hover{background-color:#5eead4!important;border-color:#5eead4!important}.btn-danger{background-color:var(--color-danger);color:#fff}.btn-danger:hover{background-color:#dc2626;transform:translateY(-1px)}.btn-light{background-color:var(--color-bg);color:var(--color-text-main);border-color:var(--color-border)}.btn-light:hover{background-color:var(--color-border)}.btn-full{width:100%}.badge{border-radius:50px;align-items:center;padding:.25rem .75rem;font-size:.8rem;font-weight:700;display:inline-flex}.badge-success{color:var(--color-accent-dark);background-color:#10b9811a}.badge-warning{color:var(--color-warning);background-color:#d977061a}.badge-danger{color:var(--color-danger);background-color:#ef44441a}.card{background:var(--surface-glass);border:1px solid var(--color-border);border-radius:var(--radius-lg);transition:var(--transition);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);padding:1.5rem;position:relative;overflow:hidden;box-shadow:0 12px 30px #0f172a0d}.card:hover{border-color:#10b98138;transform:translateY(-6px);box-shadow:0 18px 38px #0f172a14}.card:before{content:"";background:var(--color-primary);opacity:.9;height:4px;position:absolute;inset:0 0 auto}.card-title{color:var(--color-heading);margin-bottom:.75rem;font-size:1.25rem}.card-img-placeholder{background:var(--color-primary-dark);border-radius:var(--radius-md);color:#fff;justify-content:center;align-items:center;width:100%;height:180px;margin-bottom:1.25rem;font-size:3rem;display:flex;position:relative;overflow:hidden}.grid{gap:1.5rem;display:grid}.grid-2{grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr))}.grid-3{grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr))}.grid-4{grid-template-columns:repeat(auto-fit,minmax(min(100%,220px),1fr))}.section-header{text-align:center;margin-bottom:2.5rem}.section-tag{color:var(--color-accent-dark);text-transform:uppercase;letter-spacing:.05em;margin-bottom:.5rem;font-size:.9rem;font-weight:700;display:block}.section-title{letter-spacing:-.02em;margin-bottom:.75rem;font-size:2rem}.section-subtitle{color:var(--color-text-muted);max-width:600px;margin:0 auto;font-size:1.1rem;line-height:1.8}.top-students-section{background-color:var(--color-surface);border-top:1px solid var(--color-border);border-bottom:1px solid var(--color-border);padding:4.5rem 0;overflow:hidden}.top-students-marquee{direction:ltr;padding:.5rem 0 1rem;overflow:hidden}.top-students-track{will-change:transform;justify-content:flex-start;width:max-content;animation:42s linear infinite top-students-scroll;display:flex}.top-students-marquee:hover .top-students-track{animation-play-state:paused}@keyframes top-students-scroll{0%{transform:translate(0%)}to{transform:translate(-50%)}}.top-student-card{background:var(--surface-glass);border:1px solid var(--color-border);border-radius:var(--radius-lg);width:250px;transition:var(--transition);text-align:center;direction:rtl;flex:none;margin-left:1.25rem;padding:1.5rem;box-shadow:0 12px 30px #0f172a0d}.top-student-card:hover{border-color:var(--color-primary);transform:translateY(-3px);box-shadow:0 18px 38px #0f172a14}.top-student-avatar{color:#fff;background:var(--color-primary);-webkit-user-select:none;user-select:none;border-radius:50%;justify-content:center;align-items:center;width:58px;height:58px;margin:0 auto .75rem;font-size:1.45rem;font-weight:800;display:flex;box-shadow:0 6px 16px #1877f240}.top-student-name{color:var(--color-text-main);margin-bottom:.35rem;font-size:1.05rem;font-weight:700}.top-student-year{color:var(--color-primary);background:var(--color-primary-ghost);border:1px solid var(--color-border);border-radius:var(--radius-sm);margin-bottom:.55rem;padding:.15rem .6rem;font-size:.78rem;font-weight:700;display:inline-block}.top-student-achievement{color:var(--color-text-muted);font-size:.9rem;line-height:1.6}@media (prefers-reduced-motion:reduce){.top-students-track{animation:none}.top-students-marquee{-webkit-overflow-scrolling:touch;overflow-x:auto}}.lesson-video-subtitle{color:var(--color-text-muted);margin:-.5rem 0 1.5rem;font-size:1.05rem;font-weight:400;line-height:1.7}.lesson-video-subtitle .lesson-video-subtitle-line{display:block}.lesson-video-subtitle[hidden]{display:none}.footer{background-color:var(--footer-bg);color:#fffc;border-top:4px solid var(--color-accent);margin-top:auto;padding:4rem 0 2rem}.footer-grid{grid-template-columns:2fr 1fr;gap:3rem;margin-bottom:3rem;display:grid}@media (width<=768px){.footer-grid{grid-template-columns:1fr;gap:2rem}}.footer-about h3{color:#fff;align-items:center;gap:.5rem;margin-bottom:1rem;font-size:1.5rem;display:flex}.footer-about p{max-width:400px;font-size:.95rem;line-height:1.7}.footer-links-title{color:#fff;margin-bottom:1.25rem;font-size:1.1rem;font-weight:700}.footer-links{flex-direction:column;gap:.75rem;display:flex}.footer-link{color:#ffffffb3;font-size:.95rem}.footer-link:hover{color:var(--color-accent-light);padding-inline-start:4px}.footer-bottom{border-top:1px solid #ffffff1a;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1rem;padding-top:1.5rem;font-size:.9rem;display:flex}.hero{background:var(--hero-bg);border-bottom:1px solid var(--color-border);padding:5rem 0;position:relative;overflow:hidden}.hero-grid{grid-template-columns:.95fr 1.05fr;align-items:center;gap:4rem;display:grid}.hero-content{grid-area:1/1}.hero-media{grid-area:1/2}@media (width<=992px){.hero-grid{text-align:center;grid-template-columns:1fr;gap:3rem}.hero-content{grid-area:1/1}.hero-media{grid-area:2/1}.hero-actions{justify-content:center}}.hero-title{letter-spacing:-.03em;margin-bottom:1.25rem;font-size:3rem;font-weight:800;line-height:1.2}.hero-title span{color:var(--color-primary-ink);background:linear-gradient(120deg, var(--color-primary) 0%, var(--color-accent-dark) 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text}.hero-subtitle{color:var(--color-text-muted);max-width:650px;margin-bottom:2.25rem;font-size:1.25rem;line-height:1.9}.hero-badges{flex-wrap:wrap;gap:.75rem;margin-bottom:2rem;display:flex}.hero-badge{background:var(--surface-glass-strong);color:var(--color-heading);border:1px solid #10b9812e;border-radius:999px;align-items:center;gap:.45rem;padding:.65rem 1rem;font-size:.9rem;font-weight:700;display:inline-flex;box-shadow:0 10px 22px #0f172a0a}.hero-badge:before{content:"";background:var(--color-accent);border-radius:50%;width:.55rem;height:.55rem;box-shadow:0 0 0 4px #10b9811f}.hero-actions{flex-wrap:wrap;align-items:center;gap:1rem;display:flex}.hero-pill{background:var(--surface-glass-strong);color:var(--color-primary-ink);border:1px solid #10b98140;border-radius:999px;align-items:center;gap:.5rem;margin-bottom:1.5rem;padding:.5rem 1.1rem;font-size:.9rem;font-weight:700;display:inline-flex;box-shadow:0 8px 20px #0f172a0d}.hero-media{text-align:start;justify-content:center;align-items:center;min-height:440px;display:flex;position:relative}.hero-photo-wrap{z-index:3;aspect-ratio:1;border:6px solid var(--surface-solid);border-radius:50%;width:min(400px,100%);position:relative;overflow:hidden;box-shadow:0 30px 70px #0f4c3a40,0 12px 30px #06b6d41f}.hero-photo{object-fit:cover;width:100%;height:100%;display:block}.hero-blob{z-index:1;pointer-events:none;color:#0f4c3a73;position:absolute}.hero-blob svg{width:100%;height:100%;display:block}.hero-blob-1{top:4%;width:340px;height:320px;inset-inline-start:2%;transform:rotate(-14deg)}.hero-blob-2{bottom:0;width:280px;height:280px;inset-inline-end:0;transform:rotate(22deg)}.hero-blob-3{top:44%;width:180px;height:180px;inset-inline-end:6%;transform:rotate(8deg)}.hero-float-badge{z-index:4;background:var(--surface-glass-strong);border:1px solid #10b98138;border-radius:50%;justify-content:center;align-items:center;width:3rem;height:3rem;font-size:1.4rem;animation:5s ease-in-out infinite alternate hero-float;display:flex;position:absolute;box-shadow:0 10px 24px #0f172a1a}.hero-float-badge svg{width:1.5rem;height:1.5rem;color:var(--color-primary-ink)}.hero-float-dna{top:8%;inset-inline-start:12%}.hero-float-leaf{bottom:6%;animation-delay:2.2s;inset-inline-end:10%}@keyframes hero-float{0%{transform:translateY(0)}to{transform:translateY(-10px)}}[data-theme=dark] .hero-blob{color:#5eead48c}.hero-illustration{justify-content:center;align-items:center;display:flex;position:relative}.cell-art{background:var(--cell-art-bg);border:1px solid var(--cell-art-border);border-radius:60% 40% 70% 30%/40% 60%;justify-content:center;align-items:center;width:100%;max-width:380px;height:380px;animation:8s ease-in-out infinite alternate cell-wiggle;display:flex;position:relative;box-shadow:0 24px 60px #0f172a14,inset 0 0 40px #0f4c3a14}.cell-nucleus{background:radial-gradient(circle, #6ee7b7 0%, var(--color-primary) 100%);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:100px;height:100px;font-size:2.5rem;animation:4s infinite alternate pulse;display:flex;box-shadow:0 0 0 10px #10b9811f,0 0 24px #0f4c3a47}.cell-organelle{background-color:var(--color-warning-light);border-radius:var(--radius-sm);opacity:.7;position:absolute}.cell-organelle-1{width:40px;height:15px;top:25%;left:25%;transform:rotate(15deg)}.cell-organelle-2{background-color:var(--color-accent-dark);border-radius:50%;width:30px;height:30px;bottom:25%;right:25%}.cell-organelle-3{width:50px;height:10px;bottom:30%;left:30%;transform:rotate(-30deg)}@keyframes cell-wiggle{0%{border-radius:60% 40% 70% 30%/40% 60%;transform:rotate(0)}to{border-radius:40% 60% 30% 70%/60% 40%;transform:rotate(15deg)}}@keyframes pulse{0%{opacity:.9;transform:scale(.95)}to{opacity:1;transform:scale(1.05)}}.features-section{padding:6rem 0}.showcase-grid{grid-template-columns:repeat(3,1fr);gap:1.75rem;display:grid}.showcase-card{--sc-accent:#14b8a6;background:var(--surface-glass);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);-webkit-backdrop-filter:blur(12px);cursor:default;flex-direction:column;padding:1.5rem 1.5rem 1.6rem;transition:transform .25s,box-shadow .25s,border-color .25s;display:flex;position:relative;overflow:hidden}.showcase-card:before{content:"";background:var(--sc-accent);height:3px;position:absolute;top:0;left:0;right:0}.showcase-card:hover{box-shadow:var(--shadow-lg);border-color:color-mix(in srgb, var(--sc-accent) 30%, transparent);transform:translateY(-6px)}.ac-1{--sc-accent:#166a51}.ac-2{--sc-accent:#14b8a6}.ac-3{--sc-accent:#10b981}.ac-4{--sc-accent:#0e7490}.ac-5{--sc-accent:#06b6d4}.ac-6{--sc-accent:#ef4444}[data-theme=dark] .ac-1{--sc-accent:#34d399}[data-theme=dark] .ac-2{--sc-accent:#2dd4bf}[data-theme=dark] .ac-3{--sc-accent:#6ee7b7}[data-theme=dark] .ac-4{--sc-accent:#22d3ee}[data-theme=dark] .ac-5{--sc-accent:#67e8f9}[data-theme=dark] .ac-6{--sc-accent:#f87171}.showcase-icon{top:1.15rem;background:color-mix(in srgb, var(--sc-accent) 16%, transparent);border:1px solid color-mix(in srgb, var(--sc-accent) 45%, transparent);border-radius:14px;justify-content:center;align-items:center;width:52px;height:52px;font-size:1.5rem;display:flex;position:absolute;inset-inline-end:1.15rem}.showcase-icon svg{width:28px;height:28px;color:var(--sc-accent)}.showcase-title{color:var(--color-heading);margin:0 0 .45rem;padding-inline-end:62px;font-size:1.3rem;line-height:1.35}.showcase-desc{color:var(--color-text-muted);min-height:3.1em;margin:0 0 1.1rem;font-size:.92rem;line-height:1.7}.showcase-window{border-radius:var(--radius-md);background:var(--surface-solid);border:1px solid var(--color-border);box-shadow:var(--shadow-sm), inset 0 1px 0 color-mix(in srgb, var(--sc-accent) 10%, transparent);margin-top:auto;overflow:hidden}.showcase-window-bar{background:var(--soft-tint);border-bottom:1px solid var(--color-border);justify-content:center;align-items:center;padding:.5rem .6rem;display:flex;position:relative}.showcase-dots{gap:5px;display:flex;position:absolute;top:50%;left:.6rem;transform:translateY(-50%)}.showcase-dots i{background:var(--color-accent);border-radius:50%;width:8px;height:8px;display:block}.showcase-dots i:nth-child(2){background:var(--color-accent-blue)}.showcase-dots i:nth-child(3){background:var(--color-accent-cyan)}.showcase-window-title{color:var(--color-text-muted);letter-spacing:.2px;white-space:nowrap;text-overflow:ellipsis;font-size:.72rem;overflow:hidden}.showcase-window-body{flex-direction:column;gap:.45rem;padding:.6rem .7rem .7rem;display:flex}.sc-row{background:var(--row-hover);border:1px solid var(--color-border);border-radius:.55rem;align-items:center;gap:.55rem;padding:.42rem .55rem;display:flex}.sc-row-ico{flex-shrink:0;font-size:.9rem}.sc-row-label{color:var(--color-text-main);white-space:nowrap;text-overflow:ellipsis;flex:1;font-size:.8rem;overflow:hidden}.sc-row-tag{color:var(--color-primary-ink);background:var(--progress-track);white-space:nowrap;border-radius:30px;padding:.14rem .5rem;font-size:.66rem}.sc-badge{white-space:nowrap;border-radius:30px;padding:.16rem .6rem;font-size:.66rem;font-weight:700}.sc-badge.now{color:var(--color-accent-cyan);background:color-mix(in srgb, var(--color-accent-cyan) 12%, transparent);border:1px solid color-mix(in srgb, var(--color-accent-cyan) 40%, transparent)}.sc-badge.open{color:var(--color-accent);background:color-mix(in srgb, var(--color-accent) 12%, transparent);border:1px solid color-mix(in srgb, var(--color-accent) 40%, transparent)}.sc-badge.active{color:#fff;background:var(--sc-accent);border:1px solid var(--sc-accent)}.sc-badge.soon{color:var(--color-text-muted);background:var(--row-hover);border:1px solid var(--color-border)}.sc-lb-rank{color:#04131f;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:1.55rem;height:1.55rem;font-size:.72rem;font-weight:800;display:inline-flex}.sc-lb-rank.gold{background:#e9a422}.sc-lb-rank.silver{background:#9ca3af}.sc-lb-rank.bronze{background:#c2703d}.sc-lb-rank.num{background:var(--row-hover);color:var(--color-text-muted);border:1px solid var(--color-border)}.sc-row.lb-me{border-color:var(--sc-accent);background:color-mix(in srgb, var(--sc-accent) 10%, transparent)}.sc-lb-more{text-decoration:none;transition:border-color .2s,background .2s}.sc-lb-more:hover{border-color:color-mix(in srgb, var(--sc-accent) 50%, transparent);background:color-mix(in srgb, var(--sc-accent) 16%, transparent)}.sc-row.lb-empty{border-style:dashed;justify-content:center}.sc-row.lb-empty .sc-row-label{text-align:center;color:var(--color-text-muted);white-space:normal}.mk-rv-list{flex-direction:column;gap:.45rem;max-height:min(46vh,24rem);margin-top:.35rem;padding-inline-end:.25rem;display:flex;overflow-y:auto}.mk-rv-title{margin:0 0 .35rem;font-size:1.02rem;font-weight:700}.sc-player{align-items:center;gap:.5rem;min-width:0;display:flex}.sc-play{background:var(--sc-accent);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:22px;height:22px;font-size:.55rem;display:flex}.sc-player-label{color:var(--color-text-main);white-space:nowrap;text-overflow:ellipsis;font-size:.78rem;overflow:hidden}.sc-progress{background:var(--progress-track);border-radius:30px;height:6px;margin:.15rem 0 .5rem;overflow:hidden}.sc-progress i{background:var(--sc-accent);border-radius:30px;height:100%;display:block}.sc-qlabel{color:var(--color-text-muted);margin-bottom:.1rem;font-size:.68rem}.sc-quality{color:var(--color-text-muted);border-radius:.5rem;align-items:center;gap:.5rem;padding:.34rem .5rem;font-size:.78rem;display:flex}.sc-quality.active{background:color-mix(in srgb, var(--sc-accent) 8%, transparent);border:1px solid color-mix(in srgb, var(--sc-accent) 30%, transparent);color:var(--color-text-main)}.sc-radio{width:10px;color:var(--color-text-muted);flex-shrink:0;justify-content:center;display:inline-flex}.sc-quality.active .sc-radio{color:var(--sc-accent)}.sc-mistake{border:1px solid var(--color-border);background:var(--row-hover);border-radius:.6rem;padding:.5rem .6rem}.sc-mistake-exam{color:var(--color-text-muted);margin:0 0 .35rem;font-size:.72rem}.sc-mistake-exam strong{color:var(--color-heading);font-weight:600}.sc-mistake-q{color:var(--color-heading);margin:0 0 .5rem;font-size:.82rem;font-weight:600;line-height:1.5}.sc-mistake-answer{border-radius:.5rem;justify-content:space-between;align-items:center;gap:.5rem;padding:.3rem .5rem;font-size:.72rem;display:flex}.sc-mistake-answer:not(:last-child){margin-bottom:.35rem}.sc-mistake-answer span{flex-shrink:0;font-size:.66rem}.sc-mistake-answer.wrong{background:color-mix(in srgb, var(--color-danger) 10%, transparent);color:var(--color-danger)}.sc-mistake-answer.wrong span{color:var(--color-danger)}.sc-mistake-answer.correct{background:color-mix(in srgb, var(--color-accent) 12%, transparent);color:var(--color-accent-dark)}.sc-mistake-answer.correct span{color:var(--color-accent-dark)}.sc-qlabel.mistake-qnote{margin:.2rem 0 0}.sc-hw{background:var(--row-hover);border:1px solid var(--color-border);border-radius:.55rem;align-items:center;gap:.5rem;padding:.42rem .55rem;display:flex}.sc-hw-play{background:var(--sc-accent);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:20px;height:20px;font-size:.5rem;display:flex}.sc-quiz-q{color:var(--color-heading);margin:0 0 .5rem;font-size:.82rem;font-weight:600;line-height:1.5}.sc-opt{color:var(--color-text-main);border:1px solid #0000;border-radius:.5rem;align-items:center;gap:.5rem;padding:.34rem .55rem;font-size:.78rem;display:flex}.sc-opt.selected{background:color-mix(in srgb, var(--color-accent) 12%, transparent);border-color:color-mix(in srgb, var(--color-accent) 40%, transparent);color:var(--color-accent-dark)}.sc-opt-radio{width:10px;color:var(--color-text-muted);flex-shrink:0;justify-content:center;display:inline-flex}.sc-opt.selected .sc-opt-radio{color:var(--color-accent-dark)}@media (width<=992px){.showcase-grid{grid-template-columns:repeat(2,1fr)}}@media (width<=640px){.showcase-grid{grid-template-columns:1fr}.showcase-desc{min-height:0}}.whatsapp-float{z-index:900;background:#25d366;border-radius:50%;justify-content:center;align-items:center;width:56px;height:56px;text-decoration:none;transition:transform .22s,box-shadow .22s;display:flex;position:fixed;bottom:88px;left:20px;box-shadow:0 8px 20px #25d36661}.whatsapp-float svg{fill:#fff;width:30px;height:30px}.whatsapp-float:hover{transform:scale(1.1);box-shadow:0 14px 30px #25d3668c}[data-theme=dark] .whatsapp-float{box-shadow:0 10px 24px #25d36680}@media (width<=480px){.whatsapp-float{width:52px;height:52px;bottom:84px}.whatsapp-float svg{width:27px;height:27px}}.progress-bar-container{background-color:var(--color-border);border-radius:50px;width:100%;height:8px;margin-top:1rem;overflow:hidden}.progress-bar{background-color:var(--color-accent);border-radius:50px;height:100%}.cta-banner{background:var(--color-primary-dark);color:#fff;text-align:center;padding:5rem 0;position:relative;overflow:hidden}.cta-banner h2{color:#fff;margin-bottom:1.75rem;font-size:2.25rem;position:relative}.cta-banner p{color:#ffffffd9;max-width:600px;margin-bottom:2rem;margin-left:auto;margin-right:auto;font-size:1.15rem;position:relative}.auth-container{flex:1;justify-content:center;align-items:center;padding:4rem 1rem;display:flex}.auth-card{width:100%;max-width:450px;padding:2.5rem}.auth-header{text-align:center;margin-bottom:2rem}.auth-logo{color:var(--color-primary-ink);margin-bottom:.5rem;font-size:2rem;font-weight:800}.form-group{margin-bottom:1.25rem}.form-label{color:var(--color-text-main);margin-bottom:.5rem;font-size:.95rem;font-weight:600;display:block}.form-input{border-radius:var(--radius-md);border:1px solid var(--color-border);width:100%;font-family:var(--font-family);transition:var(--transition);background-color:var(--input-bg);outline:none;padding:.75rem 1rem;font-size:.95rem}.form-input:focus{border-color:var(--color-accent);box-shadow:0 0 0 3px #10b98126}.auth-input-wrap{align-items:center;display:flex;position:relative}.auth-input-wrap .form-input{padding-right:2.75rem}.auth-input-icon{z-index:1;pointer-events:none;font-size:1rem;position:absolute;right:.9rem}.password-toggle{color:var(--color-text-muted);cursor:pointer;background:0 0;border:0;padding:.35rem;font-size:1.2rem;line-height:1;position:absolute;left:.6rem}.password-toggle:hover{color:var(--color-primary-ink)}.password-requirements{color:var(--color-text-muted);text-align:right;margin:-.2rem 0 1rem;padding-inline-start:.25rem;font-size:.78rem}.role-selector{grid-template-columns:1fr 1fr;gap:1rem;margin-bottom:1.5rem;display:grid}.role-option{position:relative}.role-radio{opacity:0;width:0;height:0;position:absolute}.role-label{border:1px solid var(--color-border);border-radius:var(--radius-md);cursor:pointer;transition:var(--transition);color:var(--color-text-muted);justify-content:center;align-items:center;gap:.5rem;padding:.75rem;font-weight:600;display:flex}.role-radio:checked+.role-label{border-color:var(--color-primary-ink);background-color:var(--color-primary-ghost);color:var(--color-primary-ink)}.form-footer{justify-content:space-between;align-items:center;margin-bottom:1.5rem;font-size:.875rem;display:flex}.checkbox-label{cursor:pointer;align-items:center;gap:.5rem;display:flex}.dashboard-layout{flex:1;padding:3rem 0}.dashboard-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1rem;margin-bottom:2.5rem;display:flex}.dashboard-userinfo h1{margin-bottom:.25rem;font-size:2rem}.stat-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1.5rem;margin-bottom:3rem;display:grid}.stat-card{border-radius:var(--radius-md);background-color:var(--color-surface);border:1px solid var(--color-border);box-shadow:var(--shadow-sm);align-items:center;gap:1.25rem;padding:1.5rem;display:flex}.stat-icon{border-radius:var(--radius-md);width:3.5rem;height:3.5rem;color:var(--color-primary-ink);background-color:#0f4c3a14;justify-content:center;align-items:center;font-size:1.5rem;display:flex}.stat-value{color:var(--color-heading);font-size:1.75rem;font-weight:800;line-height:1.2}.stat-label{color:var(--color-text-muted);font-size:.9rem}.dashboard-content-grid{grid-template-columns:2fr 1fr;gap:2rem;display:grid}@media (width<=992px){.dashboard-content-grid{grid-template-columns:1fr}}.dashboard-section-title{justify-content:space-between;align-items:center;margin-bottom:1.25rem;font-size:1.35rem;display:flex}.registration-requests-summary{color:var(--color-text-muted);align-items:center;gap:.65rem;margin-bottom:1.25rem;font-weight:600;display:flex}.registration-requests-summary .badge{font-size:.95rem}.registration-request-actions{flex-wrap:wrap;gap:.5rem;display:flex}.registration-request-actions .btn{padding:.45rem .85rem;font-size:.85rem}.registration-requests-empty,.registration-requests-loading{text-align:center;margin:0;padding:2rem 1rem}@media (width<=768px){.registration-requests-summary{flex-direction:column;align-items:flex-start}}.quiz-workspace{border-radius:var(--radius-lg);background:var(--surface-glass);border:1px solid #10b9812e;margin-bottom:2rem;padding:1.5rem;box-shadow:0 14px 28px #0f172a0d}.quiz-panel-header{justify-content:space-between;align-items:flex-start;gap:1.25rem;margin-bottom:1.25rem;display:flex}.quiz-panel-header h2{margin-bottom:.35rem;font-size:1.35rem}.quiz-panel-header p{color:var(--color-text-muted);max-width:660px;font-size:.95rem;line-height:1.7}.quiz-icon-badge{background:var(--color-primary);color:#fff;border-radius:1rem;flex:none;place-items:center;width:3.4rem;height:3.4rem;font-size:1.75rem;font-weight:900;display:grid;box-shadow:0 14px 28px #0f4c3a2e}.quiz-form{grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;margin-bottom:1.25rem;display:grid}.quiz-form textarea{resize:vertical;min-height:100px}.quiz-form-wide{grid-column:1/-1}.student-quiz-list,.quiz-created-list{gap:.85rem;display:grid}.mistakes-list{gap:1rem;display:grid}.mistake-card{border:1px solid var(--color-border);border-radius:var(--radius-lg);background:var(--surface-glass);padding:1.25rem;box-shadow:0 8px 20px #0f172a0a}.mistake-card h2{color:var(--color-heading);margin:.45rem 0 1rem;font-size:1.05rem;line-height:1.7}.mistake-exam{color:var(--color-text-muted);margin:0}.mistake-answer{border-radius:var(--radius-md);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1rem;margin-top:.55rem;padding:.7rem .85rem;display:flex}.mistake-answer.wrong{color:#b91c1c;background:#ef444417}.mistake-answer.correct{color:var(--color-primary-ink);background:#10b9811a}.mistake-card time{color:var(--color-text-muted);margin-top:.85rem;font-size:.85rem;display:block}.mistakes-empty{text-align:center;border:1px dashed var(--color-primary-light);border-radius:var(--radius-lg);color:var(--color-primary-ink);background:var(--surface-glass);padding:2.25rem 1rem}.mistakes-pagination{justify-content:center;align-items:center;gap:.75rem;margin-top:1.25rem;display:flex}.quiz-item,.quiz-mini-row{border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--surface-glass);align-items:center;gap:.85rem;padding:.9rem;display:flex}.quiz-item-icon,.quiz-mini-icon{width:2.35rem;height:2.35rem;color:var(--color-primary-ink);background:#10b9811a;border-radius:.8rem;flex:none;place-items:center;font-weight:900;display:grid}.quiz-item-content{flex:1;min-width:0}.quiz-item-content h4,.quiz-mini-row strong{color:var(--color-heading);font-size:.98rem}.quiz-item-content p,.quiz-mini-row small{color:var(--color-text-muted);font-size:.8rem;line-height:1.6;display:block}.btn-quiz-start{flex:none;padding-inline:1rem}.notification-center{position:relative}.notification-btn{border:1px solid var(--color-border);background:var(--surface-solid);width:2.65rem;height:2.65rem;color:var(--color-primary-ink);cursor:pointer;transition:var(--transition);border-radius:50%;place-items:center;display:grid;position:relative;box-shadow:0 8px 18px #0f172a0a}.notification-btn:hover{border-color:#10b98152;transform:translateY(-1px)}.notification-symbol{background:var(--color-primary);color:#fff;border-radius:50%;place-items:center;width:1.05rem;height:1.05rem;font-size:.72rem;font-weight:900;display:grid}.notification-count{background:var(--color-danger);color:#fff;border-radius:999px;place-items:center;min-width:1.1rem;height:1.1rem;padding:0 .25rem;font-size:.7rem;font-weight:800;display:inline-grid;position:absolute;top:-.3rem;right:-.25rem}.notification-menu{border:1px solid var(--color-border);border-radius:var(--radius-lg);background:var(--surface-solid);opacity:0;pointer-events:none;width:min(22rem,90vw);transition:var(--transition);z-index:1200;padding:.85rem;position:absolute;top:calc(100% + .75rem);left:0;transform:translateY(-6px);box-shadow:0 18px 36px #0f172a1f}.notification-menu.show{opacity:1;pointer-events:auto;transform:translateY(0)}.notification-menu-header{border-bottom:1px solid var(--color-border);justify-content:space-between;align-items:center;gap:1rem;margin-bottom:.65rem;padding-bottom:.65rem;display:flex}.notification-menu-header button{color:var(--color-primary-ink);font-family:var(--font-family);cursor:pointer;background:0 0;border:0;font-weight:700}.notification-item{border-radius:var(--radius-md);gap:.75rem;padding:.75rem;display:flex}.notification-item.unread{background:var(--color-primary-ghost)}.notification-item-icon{background:var(--color-surface);width:2rem;height:2rem;color:var(--color-primary-ink);border-radius:50%;flex:none;place-items:center;font-weight:900;display:grid}.notification-item h4{margin-bottom:.15rem;font-size:.92rem}.notification-item p,.notification-empty{color:var(--color-text-muted);font-size:.82rem;line-height:1.6}.table-responsive{border-radius:var(--radius-md);border:1px solid var(--color-border);background-color:var(--color-surface);width:100%;overflow-x:auto}.table{border-collapse:collapse;text-align:right;width:100%;font-size:.95rem}.table th{background-color:var(--color-bg);color:var(--color-heading);border-bottom:2px solid var(--color-border);padding:1rem;font-weight:700}.table td{border-bottom:1px solid var(--color-border);color:var(--color-text-main);vertical-align:middle;padding:1rem}.table tbody tr:last-child td{border-bottom:none}.table tbody tr:hover{background-color:var(--row-hover)}.assignment-item{border-bottom:1px solid var(--color-border);justify-content:space-between;align-items:center;padding:1rem 0;display:flex}.assignment-item:last-child{border-bottom:none}.assignment-info h4{color:var(--color-heading);margin-bottom:.25rem;font-size:1rem}.assignment-meta{color:var(--color-text-muted);font-size:.8rem}.filter-container{flex-wrap:wrap;gap:.75rem;margin-bottom:2rem;display:flex}.filter-btn{background-color:var(--color-surface);border:1px solid var(--color-border);color:var(--color-text-muted);cursor:pointer;transition:var(--transition);border-radius:50px;padding:.5rem 1.25rem;font-weight:600}.filter-btn:hover,.filter-btn.active{background-color:var(--color-primary-ink);color:#fff;border-color:var(--color-primary-ink)}.lesson-layout{grid-template-columns:2fr 1fr;gap:2rem;margin-top:2rem;display:grid}@media (width<=992px){.lesson-layout{grid-template-columns:1fr}}.video-player-mock{aspect-ratio:16/9;border-radius:var(--radius-lg);color:#fff;width:100%;box-shadow:var(--shadow-md);border:2px solid var(--color-primary-light);background-color:#0f172a;flex-direction:column;justify-content:center;align-items:center;margin-bottom:2rem;display:flex;position:relative;overflow:hidden}.video-player-overlay{background:linear-gradient(#0f4c3a66 0%,#0f172acc 100%);flex-direction:column;justify-content:center;align-items:center;width:100%;height:100%;display:flex;position:absolute;top:0;left:0}.video-play-btn{background-color:var(--color-accent);color:#fff;cursor:pointer;width:80px;height:80px;box-shadow:0 0 25px var(--color-accent);border:none;border-radius:50%;justify-content:center;align-items:center;margin-bottom:1.5rem;font-size:2.25rem;transition:transform .2s,background-color .2s;display:flex}.video-play-btn:hover{background-color:var(--color-accent-light);transform:scale(1.1)}.video-play-btn svg{margin-inline-start:6px}.video-title{text-shadow:0 2px 4px #00000080;margin-bottom:.5rem;font-size:1.25rem;font-weight:700}.video-duration{color:var(--color-border);font-size:.9rem}.lesson-tabs{margin-bottom:2rem}.tab-nav{border-bottom:2px solid var(--color-border);gap:2rem;margin-bottom:1.5rem;display:flex}.tab-btn{font-family:var(--font-family);color:var(--color-text-muted);cursor:pointer;transition:var(--transition);background:0 0;border:none;padding:.75rem 0;font-size:1.1rem;font-weight:700;position:relative}.tab-btn:hover,.tab-btn.active{color:var(--color-primary-ink)}.tab-btn.active:after{content:"";background-color:var(--color-primary-ink);width:100%;height:2px;position:absolute;bottom:-2px;left:0}.tab-panel{background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:2rem;display:none}.tab-panel.active{display:block}.lesson-sidebar-box{background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);margin-bottom:1.5rem;padding:1.5rem}.lesson-sidebar-title{border-bottom:1px solid var(--color-border);margin-bottom:1.25rem;padding-bottom:.75rem;font-size:1.15rem}.lesson-sidebar-box a.sidebar-current{background-color:var(--color-primary-ghost);border:1px solid var(--color-primary-light)}.sidebar-lesson-item{border-radius:var(--radius-sm);transition:var(--transition);border-bottom:1px solid var(--color-border);align-items:center;gap:.75rem;padding:.75rem .5rem;display:flex}.sidebar-lesson-item:last-child{border-bottom:none}.sidebar-lesson-item:hover,.sidebar-lesson-item.active{background-color:var(--color-bg);color:var(--color-primary-ink)}.sidebar-lesson-icon{background-color:#0f4c3a14;border-radius:50%;justify-content:center;align-items:center;width:1.75rem;height:1.75rem;font-size:.8rem;font-weight:700;display:flex}.sidebar-lesson-name{flex:1;font-size:.9rem;font-weight:500}.lesson-materials-list{flex-direction:column;gap:.75rem;display:flex}.lesson-material-item{border:1px solid var(--color-border);border-radius:var(--radius-md);background-color:var(--color-bg);justify-content:space-between;align-items:center;gap:.75rem;padding:.85rem;display:flex}.lesson-material-title{min-width:0;color:var(--color-heading);overflow-wrap:anywhere;flex:1;font-size:.9rem;font-weight:700}.lesson-material-download{flex:none;padding:.4rem .75rem;font-size:.8rem}.lesson-material-actions{flex:none;gap:.4rem;display:flex}html[data-auth=in] .js-login-trigger:not(.footer-link){display:none!important}.footer-credit{margin:0;font-size:.8rem}.footer-credit-link{font:inherit;color:var(--color-primary);text-underline-offset:2px;cursor:pointer;background:0 0;border:none;margin-inline-start:.15rem;padding:0;text-decoration:underline}.footer-credit-link:hover{color:var(--color-primary-ink)}.team-modal{text-align:center;position:relative}.team-modal-close{top:1rem;color:var(--color-text-muted);cursor:pointer;background:0 0;border:none;border-radius:50%;padding:.4rem .6rem;font-size:1.1rem;line-height:1;position:absolute;inset-inline-end:1rem}.team-modal-close:hover{color:var(--color-heading);background:var(--color-primary-ghost)}.team-modal-head h3{color:var(--color-heading);margin:0 0 .25rem;font-size:1.25rem}.team-modal-head p{color:var(--color-text-muted);margin:0 0 1.25rem;font-size:.9rem}.team-modal-grid{gap:1rem;display:flex}.team-card{border:1px solid var(--color-border);border-radius:var(--radius-lg);background:var(--color-surface);flex-direction:column;flex:1 1 0;align-items:center;gap:.6rem;min-width:0;padding:1.3rem 1rem;display:flex}.team-avatar{background:var(--color-primary-ghost);border-radius:50%;justify-content:center;align-items:center;width:3rem;height:3rem;font-size:1.4rem;display:flex}.team-card h4{color:var(--color-heading);margin:0;font-size:1rem;font-weight:700}.team-phone{color:var(--color-accent-dark);letter-spacing:.3px;font-size:.95rem;font-weight:600;text-decoration:none;transition:color .15s}.team-phone:hover{color:#128c7e;text-decoration:underline}.team-socials{gap:.6rem;margin-top:.25rem;display:flex}.team-social{width:2.25rem;height:2.25rem;color:var(--color-text-muted);background:var(--color-bg);border:1px solid var(--color-border);border-radius:50%;justify-content:center;align-items:center;text-decoration:none;transition:color .15s,background .15s,transform .15s;display:inline-flex}.team-social svg{fill:currentColor;width:18px;height:18px}.team-social:hover{transform:translateY(-2px)}.team-social-github:hover{color:#fff;background:#181717;border-color:#181717}.team-social-linkedin:hover{color:#fff;background:#0a66c2;border-color:#0a66c2}.team-social-whatsapp:hover{color:#fff;background:#25d366;border-color:#25d366}@media (width<=500px){.team-modal-grid{flex-direction:column}}.teacher-note-add-box{background-color:var(--color-bg);border-radius:var(--radius-md);border:1px dashed var(--color-primary-light);margin-bottom:1.25rem;padding:1rem}.teacher-note-card{background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);border-inline-start:4px solid var(--color-primary);margin-bottom:.75rem;padding:1rem 1.25rem}.teacher-note-content{margin-bottom:.5rem;font-size:.95rem;line-height:1.7}.teacher-note-meta{color:var(--color-text-muted);font-size:.8rem}.teacher-note-actions{gap:.5rem;margin-top:.75rem;display:flex}.question-text{margin-bottom:1.5rem;font-size:1.15rem;font-weight:600;line-height:1.7}.options-list{flex-direction:column;gap:1rem;display:flex}.option-item{position:relative}.option-radio{opacity:0;width:0;height:0;position:absolute}.option-label{border:1px solid var(--color-border);border-radius:var(--radius-md);cursor:pointer;transition:var(--transition);align-items:center;gap:1rem;padding:1rem 1.25rem;font-weight:500;display:flex}.option-radio:checked+.option-label{border-color:var(--color-accent);background-color:var(--color-primary-ghost);font-weight:600}.option-letter{background-color:var(--color-bg);border:1px solid var(--color-border);width:2rem;height:2rem;color:var(--color-text-muted);border-radius:50%;justify-content:center;align-items:center;font-weight:700;display:flex}.option-radio:checked+.option-label .option-letter{background-color:var(--color-accent);color:#fff;border-color:var(--color-accent)}.file-upload-drag{border:2px dashed var(--color-border);background-color:var(--color-bg);border-radius:var(--radius-lg);text-align:center;cursor:pointer;transition:var(--transition);margin-bottom:2rem;padding:3rem 2rem}.file-upload-drag:hover{border-color:var(--color-primary-ink);background-color:var(--color-primary-ghost)}.upload-icon{color:var(--color-text-muted);margin-bottom:1rem;font-size:3rem}.about-hero{background:var(--color-primary-dark);color:#fff;text-align:center;padding:4rem 0;position:relative;overflow:hidden}.about-hero:before,.about-hero:after{content:"";pointer-events:none;opacity:.3;background-position:50%;background-repeat:no-repeat;background-size:contain;position:absolute}.about-hero:before{background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 40' fill='none' stroke='white' stroke-width='1.8' stroke-linecap='round'><path d='M6 2c12 6 12 12 0 18s-12 12 0 18'/><path d='M18 2C6 8 6 14 18 20s12 12 0 18'/><path d='M8 7h8M8 33h8M9 14h6M9 26h6'/></svg>");width:12rem;height:14rem;top:-2rem;right:-3rem}.about-hero:after{background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='1.6' stroke-linecap='round'><path d='M12 3c6.2 0 9 3.4 9 9s-2.8 9-9 9S3 18 3 12 5.8 3 12 3z'/><circle cx='12' cy='12' r='3.4'/><path d='M7.2 16.2a3.4 3.4 0 0 1 3.4-3.4' opacity='.35'/></svg>");width:12rem;height:12rem;bottom:-3rem;left:-3rem}.about-hero h1{color:#fff;letter-spacing:-.02em;font-size:2.5rem}.about-hero p{max-width:760px;margin-inline:auto;line-height:1.9}.about-layout{grid-template-columns:1fr 1fr;gap:3rem;padding:5rem 0;display:grid}@media (width<=768px){.about-layout{grid-template-columns:1fr;gap:2rem}}.teacher-bio-card{background:var(--surface-glass);flex-wrap:wrap;align-items:flex-start;gap:1.5rem;display:flex}.teacher-avatar-placeholder{background:var(--color-primary);color:#fff;width:120px;height:120px;box-shadow:var(--shadow-md);border:4px solid var(--color-surface);border-radius:50%;justify-content:center;align-items:center;font-size:3rem;display:flex}.contact-info-list{flex-direction:column;gap:1rem;margin-top:1.5rem;display:flex}.contact-info-item{border:1px solid var(--color-border);background:var(--row-hover);transition:var(--transition);border-radius:1rem;align-items:center;gap:1rem;padding:.8rem 1rem;display:flex}.contact-info-item:hover{border-color:#10b98138;transform:translateY(-2px)}.contact-info-icon{background:var(--soft-tint);width:2.5rem;height:2.5rem;color:var(--color-primary-ink);border-radius:50%;justify-content:center;align-items:center;display:flex}.toast{background-color:var(--color-heading);color:#fff;border-radius:var(--radius-md);box-shadow:var(--shadow-lg);border-inline-start:6px solid var(--color-accent);z-index:1000;opacity:0;align-items:center;gap:1rem;padding:1rem 2rem;transition:transform .4s cubic-bezier(.175,.885,.32,1.275),opacity .4s;display:flex;position:fixed;bottom:2rem;left:2rem;transform:translateY(150%)}.toast.show{opacity:1;transform:translateY(0)}.toast-success{border-inline-start-color:var(--color-success)}.toast-danger{border-inline-start-color:var(--color-danger)}[data-theme=dark] .toast{background-color:var(--surface-solid);color:#e6edf5;border-inline-start-color:var(--color-accent-dark)}[data-theme=dark] .toast-success{color:#a7f3d0;background-color:#10b98129;border-inline-start-color:#34d399}[data-theme=dark] .toast-danger{color:#fecaca;background-color:#ef444429;border-inline-start-color:#f87171}.teacher-profile-img{width:100%;max-width:320px;height:auto;box-shadow:var(--shadow-lg);border:6px solid var(--surface-glass-strong);transition:var(--transition);border-radius:1.75rem}.teacher-profile-img:hover{box-shadow:0 20px 25px -5px var(--progress-track);transform:scale(1.02)}.teacher-section-grid{grid-template-columns:.8fr 1.2fr;align-items:center;gap:3rem;padding:5rem 0;display:grid}.teacher-section-grid>div:last-child{background:var(--surface-glass);border:1px solid var(--color-border);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-radius:1.5rem;padding:2rem;box-shadow:0 14px 30px #0f172a0d}@media (width<=768px){.teacher-section-grid{text-align:center;grid-template-columns:1fr;gap:2rem}.teacher-profile-img{margin:0 auto}}.student-name-display{color:var(--color-primary-ink);cursor:pointer;transition:var(--transition);background-color:#10b98114;border-radius:50px;align-items:center;gap:.5rem;padding:.35rem .85rem;font-size:.85rem;font-weight:700;display:inline-flex}.student-name-display:hover{background-color:#10b98126;transform:translateY(-1px)}.accordion{flex-direction:column;gap:1rem;margin-top:1.5rem;display:flex}.accordion-item{background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);transition:var(--transition);box-shadow:var(--shadow-sm);overflow:hidden}.accordion-item:hover{box-shadow:var(--shadow-md)}.accordion-header{background-color:var(--color-surface);cursor:pointer;-webkit-user-select:none;user-select:none;color:var(--color-heading);transition:var(--transition);justify-content:space-between;align-items:center;padding:1.25rem 1.5rem;font-weight:700;display:flex}.accordion-header:hover{background-color:var(--color-primary-ghost)}.accordion-title-wrapper{align-items:center;gap:.75rem;display:flex}.accordion-arrow{color:var(--color-primary-ink);font-size:1.2rem;transition:transform .3s;display:inline-block}.accordion-item.active .accordion-arrow{transform:rotate(180deg)}.accordion-body{background-color:var(--color-bg);border-top:1px solid #0000;max-height:0;transition:max-height .3s ease-out;overflow:hidden}.accordion-item.active .accordion-body{border-top-color:var(--color-border)}.accordion-content{padding:1.5rem}.lesson-list{flex-direction:column;gap:.75rem;display:flex}.lesson-list-item{background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-sm);transition:var(--transition);justify-content:space-between;align-items:center;padding:.85rem 1.25rem;display:flex}.lesson-list-item:hover{border-color:var(--color-accent);transform:translate(-4px)}.lesson-list-item-title{color:var(--color-text-main);align-items:center;gap:.75rem;font-size:.95rem;font-weight:600;display:flex}.lesson-list-item-icon{color:var(--color-accent);font-size:1.1rem}.term-section{margin-bottom:3rem}.term-title{color:var(--color-heading);border-bottom:2px solid var(--color-border);align-items:center;gap:.5rem;margin-bottom:1rem;padding-bottom:.5rem;font-size:1.5rem;display:flex}.term-badge{background-color:var(--color-primary-ink);color:#fff;border-radius:50px;padding:.25rem .75rem;font-size:.8rem}.login-icon-btn{background:var(--surface-glass);border:1px solid var(--color-border);color:var(--color-text-main);cursor:pointer;transition:var(--transition);border-radius:50%;outline:none;justify-content:center;align-items:center;padding:.6rem;display:flex;box-shadow:0 8px 18px #0f172a0a}.login-icon-btn:hover{background-color:var(--color-border);color:var(--color-primary-ink);transform:scale(1.05)}.login-icon-btn.logged-in{border-color:var(--color-accent);color:var(--color-accent);background-color:#10b9810d}.login-icon-btn.logged-in:hover{border-color:var(--color-danger);color:var(--color-danger);background-color:#ef44440d}@media (width<=1100px){.navbar{padding:.85rem 0}.nav-links{display:none}.nav-toggle{justify-content:center;align-items:center;display:inline-flex}.btn-login-minimal,.btn-signup-minimal{display:none}}@media (width<=768px){.container{padding:0 1rem}.hero{padding:3.25rem 0}.hero-title,.about-hero h1{font-size:2.15rem}.hero-subtitle,.section-subtitle{font-size:1rem}.cell-art{max-width:320px;height:min(320px,82vw)}.hero-media{min-height:0;margin-top:.5rem}.hero-photo-wrap{border-width:5px;width:min(300px,78vw)}.hero-float-badge{width:2.6rem;height:2.6rem;font-size:1.2rem}.hero-blob-1{width:260px;height:250px}.hero-blob-2{width:220px;height:220px}.hero-blob-3{width:140px;height:140px}.dashboard-layout{padding:2rem 0}.dashboard-userinfo h1,.section-title{font-size:1.65rem}.dashboard-section-title,.assignment-item,.lesson-list-item,.footer-bottom{flex-direction:column;align-items:flex-start;gap:.75rem}.tab-nav{white-space:nowrap;gap:1rem;overflow-x:auto}.tab-btn{flex:none}.tab-panel,.assignment-question-box,.card{padding:1.25rem}.quiz-form{grid-template-columns:1fr}.quiz-panel-header,.quiz-item{align-items:flex-start}.quiz-panel-header{flex-direction:column-reverse}.quiz-item{flex-wrap:wrap}.btn-quiz-start{width:100%}.notification-menu{left:0;right:auto}.grid-2>.card[style*="grid-column: span 2"]{grid-column:1/-1!important}}@media (width<=480px){.brand{font-size:1.2rem}.brand-icon{border-radius:.75rem;width:2rem;height:2rem}.btn{width:100%;padding-inline:1rem}.nav-actions .btn,.nav-actions .login-icon-btn,.nav-actions .notification-btn{flex:none;width:2.5rem}.notification-menu{width:min(19rem,100vw - 1.5rem);left:0;right:auto}.hero-actions,.hero-badges{justify-content:stretch}.hero-badge{justify-content:center}.hero-title{font-size:1.8rem}.hero-actions{flex-direction:column;align-items:stretch;gap:.75rem}.hero-photo-wrap{width:min(280px,74vw)}.hero-blob-1{width:210px;height:200px}.hero-blob-2,.hero-blob-3{display:none}.hero-float-badge{width:2.3rem;height:2.3rem;font-size:1rem}.stat-card{padding:1rem}.option-label{align-items:flex-start}}.upload-floating-status{bottom:1rem;z-index:1200;background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);width:min(320px,100vw - 2rem);box-shadow:var(--shadow-md);padding:.75rem 1rem;display:none;position:fixed;inset-inline-start:1rem}.upload-floating-status .ufl-title{color:var(--color-heading);margin-bottom:.5rem;font-size:.9rem;display:block}.upload-floating-status .upload-progress-bar{background-color:var(--progress-track);border-radius:999px;height:8px;overflow:hidden}.upload-floating-status .upload-progress-bar>div{background-color:var(--color-primary-ink);width:0%;height:100%;transition:width .2s}.upload-floating-status .ufl-label{color:var(--color-text-muted);margin-top:.4rem;font-size:.8rem;display:block}.profile-menu{display:inline-flex;position:relative}.profile-avatar{border:2px solid var(--surface-glass-strong);width:2.65rem;height:2.65rem;color:var(--color-surface);font-family:var(--font-family);cursor:pointer;transition:var(--transition);border-radius:50%;justify-content:center;align-items:center;font-size:1.15rem;font-weight:800;display:inline-flex;box-shadow:0 8px 18px #0f172a2e}.profile-avatar:hover{transform:scale(1.06);box-shadow:0 10px 22px #0f172a42}.profile-dropdown{top:calc(100% + .6rem);background:var(--surface-solid);border:1px solid var(--color-border);border-radius:var(--radius-md);z-index:1300;width:min(13.5rem,100vw - 2rem);padding:.5rem;position:absolute;inset-inline:auto 0;box-shadow:0 18px 36px #0f172a29}.profile-dropdown-header{border-bottom:1px solid var(--color-border);margin-bottom:.35rem;padding:.55rem .7rem}.profile-dropdown-header strong{color:var(--color-heading);font-size:.95rem;display:block}.profile-dropdown-header small{color:var(--color-text-muted);font-size:.78rem}.profile-menu-item{border-radius:calc(var(--radius-md) - 4px);width:100%;color:var(--color-text-main);font-family:var(--font-family);text-align:start;cursor:pointer;transition:var(--transition);background:0 0;border:0;align-items:center;gap:.6rem;padding:.6rem .7rem;font-size:.92rem;font-weight:600;display:flex}.profile-menu-item:hover{background:var(--row-hover);color:var(--color-primary-ink)}.profile-menu-danger:hover{color:var(--color-danger);background:#ef44441f}.profile-menu-toast{background-color:var(--color-primary-dark);color:var(--color-surface);box-shadow:var(--shadow-lg);opacity:0;z-index:1400;border-radius:50px;padding:.7rem 1.4rem;font-size:.9rem;font-weight:600;transition:transform .35s cubic-bezier(.175,.885,.32,1.275),opacity .35s;position:fixed;bottom:2rem;left:50%;transform:translate(-50%)translateY(150%)}.profile-menu-toast.show{opacity:1;transform:translate(-50%)translateY(0)}[data-theme=dark] .profile-menu-toast{color:#e6edf5;background-color:#16273a}@media (width<=480px){.profile-avatar{flex:none;width:2.5rem;height:2.5rem}.profile-menu-toast{left:1rem;transform:translateY(150%)}.profile-menu-toast.show{transform:translateY(0)}}.lesson-exam-card{background:var(--surface-glass);border:1px solid var(--color-border);border-radius:var(--radius-lg);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);transition:var(--transition);flex-direction:column;gap:.65rem;margin-bottom:1rem;padding:1.25rem 1.35rem;display:flex;box-shadow:0 12px 30px #0f172a0d}.lesson-exam-card:hover{transform:translateY(-3px);box-shadow:0 10px 15px -3px #0f4c3a14,0 4px 6px -4px #0f4c3a0f}.lesson-exam-card .lesson-exam-title{color:var(--color-heading);font-size:1.02rem;font-weight:700}.lesson-exam-meta{color:var(--color-text-muted);flex-wrap:wrap;gap:.35rem .5rem;font-size:.82rem;display:flex}.lesson-exam-meta span{background:var(--color-primary-ghost);color:var(--color-primary-ink);white-space:nowrap;border-radius:999px;padding:.18rem .7rem}.lesson-exam-status{white-space:nowrap;border-radius:999px;padding:.24rem .85rem;font-size:.78rem;font-weight:700;display:inline-block}.lesson-exam-status.status-upcoming{color:var(--color-accent-cyan);background:#3b82f61f}.lesson-exam-status.status-active{color:var(--color-accent-dark);background:#10b9811f}.lesson-exam-status.status-ended{color:var(--color-text-muted);background:#6b72801f}.lesson-exam-score{color:var(--color-accent-dark);white-space:nowrap;background:#10b98124;border:1px solid #10b98159;border-radius:999px;padding:.3rem .85rem;font-size:.85rem;font-weight:800}.lesson-exam-foot{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:.6rem;margin-top:auto;display:flex}:root{--skeleton-base:#e2e8f0;--skeleton-highlight:#fff9}[data-theme=dark]{--skeleton-base:#1e2c3d;--skeleton-highlight:#ffffff12}.skeleton-shape{background:var(--skeleton-base);border-radius:var(--radius-sm,6px);vertical-align:middle;display:inline-block;position:relative;overflow:hidden}.skeleton-shape:after{content:"";background:linear-gradient(90deg, transparent 0%, var(--skeleton-highlight) 50%, transparent 100%);animation:1.4s infinite skeleton-shimmer;position:absolute;inset:0;transform:translate(-100%)}.skeleton-circle{border-radius:50%}@keyframes skeleton-shimmer{to{transform:translate(100%)}}.skeleton-block{flex-direction:column;gap:.65rem;padding:.25rem 0;display:flex}.skeleton-list-row{align-items:flex-start;gap:.75rem;padding:.6rem 0;display:flex}.skeleton-list-lines{flex-direction:column;flex:1;gap:.4rem;padding-top:.15rem;display:flex}.skeleton-grid{grid-template-columns:repeat(auto-fill,minmax(min(100%,280px),1fr));gap:1rem;display:grid}.skeleton-card{background:var(--surface-glass);border:1px solid var(--color-border);border-radius:var(--radius-lg);flex-direction:column;gap:.7rem;padding:1.25rem 1.35rem;display:flex}.skeleton-error{border:1px dashed var(--color-danger);border-radius:var(--radius-md);color:var(--color-text-main);background:#ef44440f;justify-items:start;gap:.75rem;padding:1rem;display:grid}.skeleton-error p{color:var(--color-text-muted);margin:0;font-size:.9rem}.skeleton-reveal{animation:.25s skeleton-fade}@keyframes skeleton-fade{0%{opacity:.3}to{opacity:1}}.unit-grid{grid-template-columns:repeat(3,1fr);gap:1.5rem;display:grid}.unit-card{background:var(--surface-glass);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);transition:var(--transition);flex-direction:column;display:flex;overflow:hidden}.unit-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}.unit-card-header{justify-content:center;align-items:center;height:118px;display:flex;position:relative}.unit-card-header:after{content:"";pointer-events:none;background:radial-gradient(circle at 78% 22%,#ffffff47 0,#0000 40%);position:absolute;inset:0}.unit-card-icon{filter:drop-shadow(0 4px 10px #00000038);z-index:1;font-size:3rem;line-height:1}.unit-card-header.accent-1{background:#0f4c3a}.unit-card-header.accent-2{background:#0e7490}.unit-card-header.accent-3{background:#059669}.unit-card-header.accent-4{background:#0f766e}.unit-card-header.accent-5{background:#0e7490}.unit-card-header.accent-6{background:#0f4c3a}.unit-card-header.accent-7{background:#065f46}[data-theme=dark] .unit-card-header.accent-1{background:#166a51}[data-theme=dark] .unit-card-header.accent-2{background:#155e75}[data-theme=dark] .unit-card-header.accent-3{background:#047857}[data-theme=dark] .unit-card-header.accent-4{background:#0f766e}[data-theme=dark] .unit-card-header.accent-5{background:#155e75}[data-theme=dark] .unit-card-header.accent-6{background:#166a51}[data-theme=dark] .unit-card-header.accent-7{background:#0b5e47}.unit-card-body{flex-direction:column;flex:1;gap:.85rem;padding:1.25rem 1.35rem 1.4rem;display:flex}.unit-card-body h3{color:var(--color-heading);margin:0;font-size:1.08rem;font-weight:800;line-height:1.6}.unit-card-count{color:var(--color-text-muted);margin:0;font-size:.85rem}.unit-card-desc{color:var(--color-text-muted);margin:0;font-size:.93rem;line-height:1.8}.unit-card-btn{align-self:flex-start;margin-top:auto}@media (width<=992px){.unit-grid{grid-template-columns:repeat(2,1fr)}}@media (width<=560px){.unit-grid{grid-template-columns:1fr}}.courses-grid{grid-template-columns:repeat(auto-fill,minmax(min(100%,300px),1fr));gap:1.5rem;display:grid}.course-card{background:var(--surface-glass);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);transition:var(--transition);flex-direction:column;text-decoration:none;display:flex;overflow:hidden}.course-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}.course-card-header{background:#0f4c3a;justify-content:center;align-items:center;height:150px;display:flex;position:relative}.course-card-header:after{content:"";pointer-events:none;background:radial-gradient(circle at 78% 20%,#ffffff47 0,#0000 42%);position:absolute;inset:0}.course-card-icon{filter:drop-shadow(0 5px 12px #00000040);z-index:1;font-size:4rem;line-height:1}.course-card-body{flex-direction:column;flex:1;gap:.7rem;padding:1.35rem 1.4rem 1.5rem;display:flex}.course-card-title{color:var(--color-heading);margin:0;font-size:1.3rem;font-weight:800}.course-card-subtitle{color:var(--color-accent-dark);margin:0;font-size:.9rem;font-weight:700}.course-card-desc{color:var(--color-text-muted);margin:0;font-size:.95rem;line-height:1.8}.course-card-btn{align-self:flex-start;margin-top:auto}@media (width<=560px){.courses-grid{grid-template-columns:1fr}}.scoreboard-podium{flex-wrap:wrap;justify-content:center;align-items:flex-end;gap:1rem;margin:0 0 1.5rem;padding:1.25rem 0;display:flex}.scoreboard-podium-card{text-align:center;border:1px solid var(--color-border);background:var(--color-surface,#fff);min-width:180px;box-shadow:var(--shadow-sm,0 2px 8px #0000000f);cursor:pointer;border-radius:16px;flex:0 220px;padding:1.25rem 1rem;transition:transform .15s,box-shadow .15s}.scoreboard-podium-card:hover{box-shadow:var(--shadow-md,0 8px 20px #0000001f);transform:translateY(-3px)}.scoreboard-podium-first{border-color:#fbbf24;flex-basis:240px;box-shadow:0 6px 20px #fbbf2440}.scoreboard-podium-medal{font-size:2.2rem;line-height:1}.scoreboard-podium-rank{color:var(--color-text-muted);margin:.5rem 0 .25rem;font-size:.85rem;font-weight:700}.scoreboard-podium-first .scoreboard-podium-rank{color:#b45309}.scoreboard-podium-name{color:var(--color-primary-ink);text-overflow:ellipsis;white-space:nowrap;font-size:1.05rem;font-weight:800;overflow:hidden}.scoreboard-podium-score{color:var(--color-primary);margin-top:.5rem;font-size:1.1rem;font-weight:800}.scoreboard-podium-percent{color:var(--color-text-muted);font-size:.85rem}.scoreboard-controls .card{margin-bottom:1.5rem}.scoreboard-rank{background:var(--color-bg);width:28px;height:28px;color:var(--color-text);border-radius:50%;justify-content:center;align-items:center;font-size:.85rem;font-weight:800;display:inline-flex}.scoreboard-rank-1{color:#1f2937;background:#fbbf24}.scoreboard-rank-2{color:#0f172a;background:#cbd5e1}.scoreboard-rank-3{color:#fff;background:#f59e0b}.scoreboard-table th{white-space:nowrap}.scoreboard-student-code{font-size:.72rem}.scoreboard-podium-row-1{background:#fbbf2414}.scoreboard-podium-row-2{background:#cbd5e126}.scoreboard-podium-row-3{background:#f59e0b14}.scoreboard-empty{text-align:center;padding:1.5rem 0}.scoreboard-summary-card{background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-md);text-align:center;padding:.75rem 1rem}.scoreboard-summary-label{color:var(--color-text-muted);margin-bottom:.3rem;font-size:.78rem}.scoreboard-summary-value{color:var(--color-primary-ink);font-size:1rem;font-weight:800}@media (width<=600px){.scoreboard-podium-card{flex-basis:100%;min-width:0}.scoreboard-podium-first{order:0}}.whiteboard-page{padding-top:0!important}.whiteboard-container{flex-direction:column;max-width:100%;height:calc(100vh - 70px);display:flex;padding:0!important}.whiteboard-page .dashboard-header{background:var(--color-surface);border-bottom:1px solid var(--color-border);padding:1.25rem 1.5rem .75rem}.whiteboard-page .dashboard-header h1{margin:0;font-size:1.4rem}.whiteboard-page .dashboard-header .text-muted{margin:.2rem 0 0;font-size:.88rem}.whiteboard-toolbar{background:var(--color-surface);border-bottom:1px solid var(--color-border);flex-shrink:0;gap:.6rem;padding:.6rem 1.5rem;display:flex}#whiteboard-root{flex-direction:column;flex:1;min-height:0;display:flex}.excalidraw-wrapper{flex:1;width:100%;min-height:0}.excalidraw-wrapper .excalidraw{height:100%!important}[data-theme=dark] .excalidraw{--ui-background:#14212f}.whiteboard-page .footer{display:none}