@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;900&display=swap";:root{--brand-primary:#6366f1;--brand-primary-hover:#4f46e5;--brand-secondary:#ec4899;--success:#10b981;--warning:#f59e0b;--danger:#ef4444;--info:#3b82f6;--radius-sm:6px;--radius-md:12px;--radius-lg:24px;--max-width:1200px;--border-focus:#6366f180;--bg-primary:#f9fafb;--bg-surface:#fff;--bg-surface-alt:#f3f4f6;--text-main:#111827;--text-muted:#6b7280;--border:#0000001a;--shadow-color:#0000001a}@media (prefers-color-scheme:dark){:root{--bg-primary:#0f1115;--bg-surface:#1c1f26;--bg-surface-alt:#232730;--text-main:#f3f4f6;--text-muted:#9ca3af;--border:#ffffff1a;--shadow-color:#0000004d}}[data-theme=light]{--bg-primary:#f9fafb;--bg-surface:#fff;--bg-surface-alt:#f3f4f6;--text-main:#111827;--text-muted:#6b7280;--border:#0000001a;--shadow-color:#0000001a}[data-theme=dark]{--bg-primary:#0f1115;--bg-surface:#1c1f26;--bg-surface-alt:#232730;--text-main:#f3f4f6;--text-muted:#9ca3af;--border:#ffffff1a;--shadow-color:#0000004d}.theme-selector{border-radius:var(--radius-sm);background:var(--bg-surface-alt);border:1px solid var(--border);color:var(--text-main);cursor:pointer;padding:.5rem}*{box-sizing:border-box}body{background-color:var(--bg-primary);color:var(--text-main);-webkit-font-smoothing:antialiased;margin:0;padding:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6}.app-body{background-color:var(--bg-primary);flex-direction:column;min-height:100vh;display:flex}h1,h2,h3,h4{letter-spacing:-.02em;margin-top:0;font-weight:700;line-height:1.2}a{color:var(--brand-primary);text-decoration:none;transition:color .2s}a:hover{color:var(--text-main)}.container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 2rem}.text-center{text-align:center}.primary-btn,.secondary-btn,.success-btn,.info-btn,.warning-btn{border-radius:var(--radius-sm);cursor:pointer;border:none;justify-content:center;align-items:center;padding:.75rem 1.5rem;font-size:1rem;font-weight:600;line-height:1;text-decoration:none;transition:all .2s cubic-bezier(.16,1,.3,1);display:inline-flex}.primary-btn{background:var(--brand-primary);color:#fff;border:1px solid #0000;box-shadow:0 4px 12px #6366f133}.primary-btn:hover{background:var(--brand-primary-hover);transform:translateY(-1px);box-shadow:0 6px 16px #6366f14d}.primary-btn:active{transform:translateY(1px)}.secondary-btn{color:var(--text-main);border:1px solid var(--border);background:0 0}.secondary-btn:hover{background:#ffffff0d;border-color:#fff3}.sm-btn{padding:.5rem 1rem;font-size:.9rem}.lg-btn{border-radius:var(--radius-md);padding:1rem 2rem;font-size:1.1rem}.success-btn{background:var(--success);color:#fff}.info-btn{background:var(--info);color:#fff}.warning-btn{background:var(--warning);color:#fff}.site-header{border-bottom:1px solid var(--border);background:var(--bg-surface);z-index:100;padding:1rem 0;position:sticky;top:0}.header-container{justify-content:space-between;align-items:center;display:flex}.header-actions{align-items:center;gap:1rem;display:flex}.brand-logo{align-items:center;gap:.5rem;text-decoration:none;display:flex}.brand-logo-icon{width:auto;height:40px;display:block}.brand-logo-text{color:var(--text-main);letter-spacing:-.05em;margin:0;font-size:1.5rem;font-weight:900}.brand-logo-footer{margin-bottom:1rem}.brand-logo-icon-footer{height:30px}.brand-logo-text-footer{font-size:1.25rem}.main-nav{gap:2rem;display:flex}.main-nav a{color:var(--text-muted);font-weight:500}.main-nav a:hover{color:var(--text-main)}.marquee-banner{background:linear-gradient(90deg, var(--brand-primary), var(--brand-secondary));color:#fff;white-space:nowrap;letter-spacing:2px;border-bottom:1px solid #0000001a;padding:.6rem 0;font-size:.95rem;font-weight:800;overflow:hidden}.marquee-content{animation:25s linear infinite marqueeScroll;display:inline-block}.marquee-content span{padding-right:2rem}@keyframes marqueeScroll{0%{transform:translate(0)}to{transform:translate(-50%)}}.hero-section{text-align:center;padding:6rem 0}.hero-title{color:var(--text-main);margin-bottom:1.5rem;font-size:clamp(3rem,5vw,5rem)}.hero-subtitle{color:var(--text-muted);max-width:600px;margin:0 auto 2.5rem;font-size:1.25rem}.hero-actions{justify-content:center;gap:1rem;display:flex}.feature-section{padding:5rem 0}.alt-bg{background:var(--bg-surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}.section-title{text-align:center;margin-bottom:3rem;font-size:2.5rem}.feature-grid{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem;display:grid}.feature-card{background:var(--bg-surface-alt);border:1px solid var(--border);border-radius:var(--radius-md);padding:2rem;transition:transform .2s,border-color .2s}.feature-card:hover{border-color:var(--brand-primary);transform:translateY(-4px)}.feature-icon{margin-bottom:1rem;font-size:2.5rem}.feature-card h3{margin-bottom:.75rem;font-size:1.25rem}.feature-card p{color:var(--text-muted);margin:0;font-size:1rem}.cta-section{padding:6rem 0}.site-footer{text-align:center;color:var(--text-muted);border-top:1px solid var(--border);padding:3rem 0}.panel{background:var(--bg-surface-alt);border-radius:var(--radius-md);border:1px solid var(--border);flex:1;min-width:300px;padding:2rem}.input-field{border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--bg-primary);width:100%;color:var(--text-main);padding:.75rem 1rem;font-family:inherit;font-size:1rem;transition:border-color .2s}.input-field:focus{border-color:var(--brand-primary);outline:none;box-shadow:0 0 0 3px #6c5ce733}.input-group{gap:.5rem;width:100%;display:flex}.input-group .input-field{flex:1}.player-lobby-controls{margin-bottom:1rem}.player-lobby-input-group{max-width:300px;margin:0 auto}.icon-btn{background:var(--bg-surface-alt);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;justify-content:center;align-items:center;padding:0 1rem;font-size:1.5rem;transition:all .2s;display:flex}.icon-btn:hover{background:var(--border)}.upload-label{background:var(--bg-primary);border:1px dashed var(--border);border-radius:var(--radius-sm);cursor:pointer;text-align:center;color:var(--text-main);flex:1;padding:.75rem;font-weight:500;transition:background .2s}.upload-label:hover{background:#ffffff05;border-color:#ffffff4d}.option-btn{color:#fff;border-radius:var(--radius-md);cursor:pointer;box-shadow:inset 0 -4px 0 #0003, 0 4px 6px var(--shadow-color);border:none;padding:2rem 1rem;font-size:1.5rem;font-weight:700;transition:transform .15s cubic-bezier(.16,1,.3,1),box-shadow .15s,opacity .3s;position:relative;overflow:hidden}.option-btn:hover:not(:disabled){box-shadow:inset 0 -4px 0 #0003, 0 8px 12px var(--shadow-color);transform:translateY(-2px)}.option-btn:active:not(:disabled){transform:translateY(2px);box-shadow:inset 0 -2px #0003,0 2px 4px #0000001a}.opt-a{background-color:var(--danger)}.opt-b{background-color:var(--info)}.opt-c{background-color:var(--warning);color:#111}.opt-d{background-color:var(--success)}.icon-shape{margin-bottom:.5rem;font-size:2rem;display:block}@keyframes pulseGlow{0%{box-shadow:0 0 #10b98166}70%{box-shadow:0 0 0 10px #10b98100}to{box-shadow:0 0 #10b98100}}.btn-pulse{animation:2s infinite pulseGlow}.podium-container{justify-content:center;align-items:flex-end;gap:1rem;height:350px;margin-top:3rem;display:flex}.podium-bar{text-align:center;color:#fff;border-radius:var(--radius-md) var(--radius-md) 0 0;opacity:0;flex-direction:column;justify-content:flex-end;width:140px;padding-bottom:1rem;font-weight:700;display:flex;position:relative;transform:translateY(100%);box-shadow:inset 0 -10px 20px #0003}.podium-1{z-index:3;background:#f59e0b;height:100%;animation:.8s cubic-bezier(.16,1,.3,1) 1.2s forwards slideUp}.podium-2{z-index:2;background:#9ca3af;height:75%;animation:.8s cubic-bezier(.16,1,.3,1) .6s forwards slideUp}.podium-3{z-index:1;background:#b45309;height:50%;animation:.8s cubic-bezier(.16,1,.3,1) forwards slideUp}.podium-name{color:var(--text-main);word-break:break-all;flex-direction:column;align-items:center;font-size:1.2rem;font-weight:900;display:flex;position:absolute;top:-110px;left:-20px;right:-20px}.podium-rank{opacity:.3;margin-bottom:.5rem;font-size:3rem}.podium-score{font-family:monospace;font-size:1.5rem}.podium-stats{opacity:.9;background:#0003;border-radius:4px;margin-top:.5rem;padding:4px 8px;font-size:.85rem}@keyframes slideUp{to{opacity:1;transform:translateY(0)}}#floating-ui{z-index:1000;align-items:center;gap:1rem;display:flex;position:absolute;top:1.5rem;right:1.5rem}#player-info-badge{background:var(--bg-surface-alt);border:1px solid var(--border);border-radius:var(--radius-lg);color:var(--text-main);align-items:center;padding:.5rem 1rem;font-weight:600;display:none;box-shadow:0 4px 6px #0000001a}#btn-audio-toggle{background:var(--bg-surface-alt);border:1px solid var(--border);cursor:pointer;border-radius:50%;width:44px;height:44px;font-size:1.2rem;transition:background .2s;display:none}#btn-audio-toggle:hover{background:var(--bg-surface)}@media (width<=768px){#options-grid{grid-template-columns:1fr!important}#auth-view{flex-direction:column}.podium-container{gap:.5rem;height:250px}.main-nav{display:none}}.hidden{display:none!important}.quiz-room-container{text-align:center;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-md);max-width:1000px;min-height:600px;margin:3rem auto;padding:2rem;position:relative}.lobby-title{color:var(--text-main);margin-bottom:2rem;font-size:2.5rem}.auth-view{flex-wrap:wrap;justify-content:center;gap:2rem;display:flex}.panel-title{color:var(--accent);margin-bottom:1rem}.panel-desc{color:var(--text-muted);margin-bottom:1rem}.form-group{flex-direction:column;align-items:start;gap:1rem;display:flex}.form-group-join{flex-direction:column;gap:1rem;display:flex}.form-label{color:var(--text-main);font-weight:700}.upload-group{gap:1rem;width:100%;display:flex}.status-text{color:var(--success);width:100%;font-size:.9rem}.csv-preview{background:var(--bg-primary);border-radius:var(--radius-sm);border:1px solid var(--border);color:var(--text-main);text-align:left;margin-top:1rem;padding:1rem;font-size:.85rem}.preview-item{margin-bottom:.5rem}.preview-ans{color:var(--success);font-weight:700}.cta-desc{color:var(--text-muted);margin-bottom:2rem}.logo-link{color:inherit;text-decoration:none}.master-notice{background:var(--bg-surface-alt);border-radius:var(--radius-md);border-left:4px solid var(--brand-primary);margin:2rem 0;padding:1.5rem}.margin-0{margin:0}.margin-t-1{margin-top:1rem}.margin-b-0{margin-bottom:0}.active-view{flex-direction:column;gap:2rem;display:flex}.pin-display{color:var(--brand-primary);margin-bottom:1rem;font-family:monospace;font-size:3rem;font-weight:900}.question-text{font-size:2rem;font-weight:700}.timer-container{justify-content:center;align-items:center;gap:1rem;display:flex}.timer-display{color:var(--warning);font-family:monospace;font-size:3rem;font-weight:700}.btn-add-time{background:var(--info);color:#fff;cursor:pointer;border:none;border-radius:50%;width:40px;height:40px;font-weight:700}.qr-container-wrapper{margin-top:2rem}.qr-container-desc{color:var(--text-muted);margin-bottom:.5rem}.qr-container{background:#fff;border-radius:8px;padding:1rem;display:inline-block}.options-grid{grid-template-columns:1fr 1fr;gap:1.5rem;width:100%;max-width:800px;margin:0 auto;display:grid}.quiz-status-text{color:var(--text-muted);min-height:2rem;margin-top:1rem;font-size:1.25rem;font-weight:700}.leaderboard-section{background:var(--bg-primary);border-radius:var(--radius-sm);border:1px solid var(--border);box-shadow:inset 0 2px 4px var(--shadow-color);margin-top:2.5rem;padding:2rem}.leaderboard-title{color:var(--text-main);margin-bottom:1.5rem}.leaderboard-list{color:var(--text-main);margin:0;padding:0;font-size:1.3rem;list-style:none}.podium-name-highlight{color:gold;font-size:1.4rem}#toast-container{z-index:9999;pointer-events:none;flex-direction:column;gap:1rem;display:flex;position:fixed;bottom:2rem;right:2rem}.toast{background:var(--bg-surface);color:var(--text-main);border:1px solid var(--border);border-radius:var(--radius-sm);box-shadow:0 10px 25px var(--shadow-color);align-items:center;gap:.75rem;padding:1rem 1.5rem;font-weight:500;animation:.3s cubic-bezier(.16,1,.3,1) forwards toastSlideIn;display:flex}.toast.error{border-left:4px solid var(--danger)}.toast.success{border-left:4px solid var(--success)}.toast.info{border-left:4px solid var(--info)}.toast.hiding{animation:.3s cubic-bezier(.16,1,.3,1) forwards toastSlideOut}@keyframes toastSlideIn{0%{opacity:0;transform:translate(120%)}to{opacity:1;transform:translate(0)}}@keyframes toastSlideOut{0%{opacity:1;transform:translate(0)}to{opacity:0;transform:translate(120%)}}.theme-btn{background:var(--bg-surface-alt);border:1px solid var(--border);color:var(--text-main);cursor:pointer;border-radius:50%;justify-content:center;align-items:center;width:44px;height:44px;padding:0;font-size:1.2rem;transition:background .2s,transform .2s;display:flex}.theme-btn:hover{background:var(--bg-surface);transform:scale(1.05)}.theme-btn:focus{border-color:var(--brand-primary);box-shadow:0 0 0 2px var(--border-focus);outline:none}.page-content{min-height:60vh;padding:4rem 0}.text-container{max-width:800px;margin:0 auto}.text-container h1{margin-bottom:1rem;font-size:3rem}.text-container h2{color:var(--brand-primary);margin-top:2.5rem;margin-bottom:1rem;font-size:1.75rem}.text-container p.lead{color:var(--text-muted);margin-bottom:2.5rem;font-size:1.25rem}.text-container ul{margin-bottom:1.5rem;padding-left:1.5rem}.text-container li{margin-bottom:.5rem}.site-footer{background-color:var(--bg-surface);border-top:1px solid var(--border);margin-top:4rem;padding:4rem 0 2rem}.footer-container{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:2rem;margin-bottom:3rem;display:flex}.footer-brand{max-width:400px}.footer-brand .logo{margin-bottom:1rem;font-size:1.5rem}.footer-brand p{color:var(--text-muted);margin:0 0 .5rem}.umbrella-msg a{color:var(--brand-primary);font-weight:600}.footer-links{flex-direction:column;gap:1rem;display:flex}.footer-links a{color:var(--text-muted);font-weight:500}.footer-links a:hover{color:var(--text-main)}.copyright{text-align:center;color:var(--text-muted);border-top:1px solid var(--border);padding-top:2rem;font-size:.875rem}