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var(--line);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);display:flex;gap:18px;justify-content:space-between;min-height:68px;padding:0 28px;position:sticky;top:0;z-index:10;box-shadow:0 2px 20px #0f172a14}.topbar .brand{display:flex;align-items:center;gap:8px;transition:transform var(--transition-fast)}.topbar .brand:hover{transform:scale(1.02)}.topbar .brand-icon{width:36px;height:36px;background:var(--brand-gradient);border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;box-shadow:var(--shadow-md);transition:all var(--transition-fast)}.topbar .brand:hover .brand-icon{transform:rotate(5deg);box-shadow:var(--shadow-lg),var(--shadow-glow)}.brand{color:var(--brand);font-size:1.35rem;font-weight:900}nav{align-items:center;display:flex;flex-wrap:wrap;gap:16px}nav a{color:var(--ink);font-weight:600;padding:10px 16px;border-radius:12px;transition:all var(--transition-fast);position:relative;overflow:hidden}nav a:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:var(--brand-gradient);transition:left var(--transition-normal);z-index:-1}nav a:hover:before{left:0}nav a:hover{color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-md)}nav a.active{background:var(--brand-gradient);color:#fff;box-shadow:var(--shadow-md)}.icon-button{min-height:36px;padding:8px}main{min-height:calc(100vh - 68px);animation:fadeInUp .6s ease-out}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.home,.page,.live-layout{margin:0 auto;max-width:1180px;padding:42px 24px}.hero{align-items:center;background:radial-gradient(circle at 20% 80%,rgba(8,127,140,.15),transparent 50%),radial-gradient(circle at 80% 20%,rgba(242,183,5,.1),transparent 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rotate(5deg)}}.hero>div{max-width:720px;position:relative;z-index:1}.eyebrow{color:var(--brand-dark);font-size:.78rem;font-weight:900;letter-spacing:0;text-transform:uppercase}.hero .eyebrow{color:#b8f3ec}h1{font-size:clamp(2rem,6vw,4.6rem);line-height:1;margin:8px 0 16px}h2{align-items:center;display:flex;font-size:1.2rem;gap:8px;margin:0 0 12px}.lead{font-size:1.2rem;line-height:1.6;max-width:680px}.actions,.card-actions,.toolbar{display:flex;flex-wrap:wrap;gap:10px}.feature-row,.grid-list,.controller-grid{display:grid;gap:18px;grid-template-columns:repeat(3,minmax(0,1fr));margin-top:24px}.feature-row>div{display:flex;flex-direction:column;background:#fffffff2;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.2);border-radius:16px;padding:24px;transition:all var(--transition-slow);position:relative;overflow:hidden}.feature-row>div:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(135deg,rgba(8,127,140,.05) 0%,transparent 50%);opacity:0;transition:opacity var(--transition-normal)}.feature-row>div:hover:before{opacity:1}.feature-row>div:hover,.panel:hover,.item-card:hover{transform:translateY(-8px) scale(1.02);box-shadow:0 20px 40px #0f172a26,var(--shadow-glow);border-color:#087f8c4d}.feature-row svg{color:var(--brand);width:32px;height:32px;margin-bottom:16px;transition:all var(--transition-normal)}.feature-row>div:hover svg{transform:scale(1.1);color:var(--brand-dark)}.feature-row>div p{color:var(--muted);line-height:1.6}.auth-panel,.join-panel{margin:42px auto;max-width:460px}.auth-panel h1,.join-panel h1{margin-bottom:24px;text-align:center}.auth-panel .eyebrow,.join-panel 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var(--line);border-radius:16px;box-shadow:var(--shadow-xl);display:flex;flex-direction:column;justify-content:center;overflow:hidden;padding:48px;width:100%;background:var(--surface);position:relative;transition:all var(--transition-normal)}.slide-canvas:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(135deg,rgba(8,127,140,.02) 0%,transparent 50%);pointer-events:none}.slide-canvas:hover{border-color:#087f8c4d;box-shadow:var(--shadow-xl),var(--shadow-glow);transform:scale(1.01)}.slide-canvas h3{font-size:clamp(1.4rem,3vw,2.6rem);line-height:1.08;margin:0 0 20px;max-width:100%;overflow-wrap:anywhere}.slide-canvas p,.slide-canvas ul,.slide-canvas ol{line-height:1.25;margin:0;max-width:94%;overflow-wrap:anywhere;white-space:pre-wrap}.slide-canvas li{margin-bottom:.35em}.live-slide-canvas,.student-slide-canvas{box-shadow:none}.live-slide-canvas{margin:12px 0 18px;min-height:280px}.student-slide-canvas{min-height:320px}.settings-column{display:grid;gap:14px}.settings-section{background:#fffffff5;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow-lg);padding:16px}.settings-section h3{align-items:center;display:flex;font-size:1rem;gap:8px;margin:0 0 14px}.segmented{display:grid;gap:8px;grid-template-columns:repeat(3,minmax(0,1fr));margin-top:10px}.segmented button{min-height:42px;padding:10px 12px;background:#fffc;border:1px solid var(--line);border-radius:10px;transition:all var(--transition-fast);font-weight:600}.segmented button:hover{background:#087f8c0d;border-color:#087f8c4d;transform:translateY(-1px);box-shadow:var(--shadow-sm)}.segmented .active,.correct.active{background:var(--brand-gradient);border-color:var(--brand);color:#fff;box-shadow:var(--shadow-md);transform:translateY(-1px)}.quiz-preview-strip{align-items:center;background:#fff8df;border:1px solid #f2d36b;border-radius:12px;display:grid;gap:4px;margin-top:16px;padding:14px}.option-editor{display:grid;gap:10px}.option-header,.option-edit-row{align-items:center;display:grid;gap:8px}.option-header{grid-template-columns:1fr auto}.option-edit-row{grid-template-columns:auto 1fr auto}.option-edit-row .correct{min-height:38px;padding:8px}.short-answer-box{display:grid;gap:12px}.quiz-box{background:#eef6f7;border-radius:8px;margin:18px 0;padding:18px}.option-row{align-items:center;grid-template-columns:28px 1fr}.option-row input[type=radio]{min-height:auto;width:auto}.session-hero{align-items:center;background:radial-gradient(circle at 30% 70%,rgba(8,127,140,.2),transparent 60%),linear-gradient(135deg,#087f8cf0,#152033f5),linear-gradient(90deg,var(--brand),#152033);border-radius:20px;color:#fff;display:flex;justify-content:space-between;gap:32px;padding:40px;box-shadow:var(--shadow-xl),var(--shadow-glow);position:relative;overflow:hidden;animation:sessionHeroSlideIn .8s ease-out}@keyframes sessionHeroSlideIn{0%{opacity:0;transform:translate(-30px)}to{opacity:1;transform:translate(0)}}.session-hero:before{content:"";position:absolute;top:-50%;right:-20%;width:400px;height:400px;background:radial-gradient(circle,rgba(255,255,255,.1) 0%,transparent 70%);animation:float 8s ease-in-out infinite;pointer-events:none}.session-hero:after{content:"";position:absolute;bottom:-30%;left:-10%;width:300px;height:300px;background:radial-gradient(circle,rgba(242,183,5,.15) 0%,transparent 70%);animation:float 10s ease-in-out infinite reverse;pointer-events:none}.session-hero>div{position:relative;z-index:1}.session-code{display:block;font-size:clamp(3rem,9vw,7rem);line-height:1;font-weight:900;letter-spacing:.05em;text-shadow:0 4px 20px rgba(0,0,0,.3)}.join-url{overflow-wrap:anywhere;color:#fffc;font-size:.9rem;margin-top:8px}.qr{background:var(--surface);border-radius:16px;height:200px;padding:16px;width:200px;box-shadow:var(--shadow-xl),var(--shadow-glow);position:relative;transition:all var(--transition-normal);border:2px solid rgba(255,255,255,.1)}.qr:hover{transform:scale(1.05);box-shadow:0 24px 60px #075d684d}.question-preview{background:linear-gradient(135deg,#fffbeb,#fef3c7);border:1px solid #fcd34d;border-radius:12px;margin:18px 0;padding:18px}.question-preview strong{display:block;font-size:1.1rem;color:#92400e;margin-bottom:12px}.question-preview div{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}.question-preview span{background:#fff;border:1px solid #fcd34d;border-radius:8px;padding:8px 12px;font-weight:600;color:#451a03}.status-line{background:linear-gradient(135deg,#087f8c1a,#087f8c0d);border:1px solid rgba(8,127,140,.2);border-left:4px solid var(--brand);border-radius:12px;color:var(--brand);font-weight:700;padding:14px 16px;margin-top:16px;display:flex;align-items:center;gap:10px;box-shadow:var(--shadow-md);position:relative;overflow:hidden}.status-line:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:var(--brand-gradient);opacity:0;transition:opacity var(--transition-normal)}.status-line:hover:before{opacity:.05}.status-line:after{content:"";width:8px;height:8px;background:var(--brand);border-radius:50%;animation:pulse 2s infinite;box-shadow:var(--shadow-glow)}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.muted{color:var(--muted)}.controller-grid{grid-template-columns:2fr 1fr}.slide-preview{min-height:320px}.slide-preview h1{font-size:clamp(2rem,5vw,4rem)}.metric{color:#117a8b;font-size:1.2rem;font-weight:900}.participant-list{display:flex;flex-wrap:wrap;gap:8px}.participant-list span{background:#eef6f7;border-radius:8px;padding:8px 10px}.rank-row{align-items:center;border-top:1px solid #e1e8f0;display:flex;justify-content:space-between;padding:10px 0}.student-screen{align-items:center;display:flex;justify-content:center;min-height:calc(100vh - 68px);padding:22px;background:linear-gradient(180deg,#f7fbff,#eef3f8)}.student-card{max-width:760px;min-height:360px;width:100%;border-radius:16px}.student-card h1{font-size:clamp(2rem,10vw,4.2rem);line-height:1.2}.answer-grid{display:grid;gap:14px;grid-template-columns:repeat(2,minmax(0,1fr));margin-top:24px}.answer-grid button{border-left:6px solid var(--brand);font-size:1.2rem;justify-content:flex-start;min-height:88px;padding:20px;background:var(--surface);transition:all var(--transition-normal);position:relative;overflow:hidden}.answer-grid button:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:var(--brand-gradient);opacity:0;transition:opacity var(--transition-fast)}.answer-grid button:hover:before{opacity:.05}.answer-grid button:hover{transform:scale(1.03);box-shadow:var(--shadow-lg),var(--shadow-glow);border-left-color:var(--brand-dark)}.answer-grid button:active{transform:scale(.98)}.answer-grid button:nth-child(2){border-left-color:#d97706}.answer-grid button:nth-child(3){border-left-color:#4f46e5}.answer-grid button:nth-child(4){border-left-color:#be185d}.answer-grid button.correct{background:var(--success-gradient);border-left-color:var(--good);color:#fff;box-shadow:var(--shadow-lg)}.answer-grid button.incorrect{background:var(--error-gradient);border-left-color:var(--bad);color:#fff;box-shadow:var(--shadow-lg)}.mini-board{margin-top:24px}.student-note{background:linear-gradient(135deg,#fef3c7,#fde68a);border:1px solid #fcd34d;border-radius:12px;left:18px;padding:12px 16px;position:fixed;right:18px;top:86px;font-weight:600;color:#92400e;box-shadow:var(--shadow-md);animation:slideIn .3s ease}@keyframes slideIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.error{color:var(--bad);font-weight:700;padding:10px 14px;background:linear-gradient(135deg,#fee2e2,#fecaca);border-radius:8px;border-left:4px solid var(--bad)}.success{color:var(--good);font-weight:900;padding:10px 14px;background:linear-gradient(135deg,#d1fae5,#a7f3d0);border-radius:8px;border-left:4px solid var(--good)}.toast-container{position:fixed;bottom:24px;right:24px;z-index:1000;display:flex;flex-direction:column;gap:12px}.toast{padding:16px 22px;border-radius:16px;background:var(--surface);box-shadow:var(--shadow-xl),var(--shadow-glow);display:flex;align-items:center;gap:14px;min-width:300px;animation:toastSlideIn .4s ease-out;border:1px solid rgba(255,255,255,.1);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}@keyframes toastSlideIn{0%{opacity:0;transform:translate(100%) scale(.9)}to{opacity:1;transform:translate(0) scale(1)}}.toast.success{border-left:4px solid var(--good);background:var(--success-gradient)}.toast.error{border-left:4px solid var(--bad);background:var(--error-gradient)}.toast.info{border-left:4px solid var(--brand);background:var(--brand-gradient);color:#fff}.result-score{font-size:2rem;font-weight:900;color:var(--good);text-align:center;margin-top:24px}.slide-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.slide-counter{background:linear-gradient(135deg,#e0f7fa,#b2ebf2);color:var(--brand);padding:4px 12px;border-radius:20px;font-weight:700;font-size:.875rem}.slide-body{color:var(--muted);line-height:1.6;margin-bottom:16px}.participant-badge{background:linear-gradient(135deg,#e0f7fa,#b2ebf2);border-radius:20px;padding:6px 12px;font-weight:600;color:var(--brand-dark);display:inline-block;margin:4px}.participant-count{color:var(--muted);font-size:.875rem;margin-top:12px;padding-top:12px;border-top:1px solid 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