:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:dark;color:#ffffffe6;--bg: #121317;--surface: #17181d;--shadow-dark: rgba(0, 0, 0, .65);--shadow-light: rgba(255, 255, 255, .03);--cyan: #46e0ff;--magenta: #ff3fc6;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;background:var(--bg)}a{font-weight:500;color:var(--cyan);text-decoration:inherit}a:hover{color:#7ce8ff}h1,h2,h3,p{margin:0}button{font-family:inherit;cursor:pointer}.app{max-width:1100px;margin:0 auto;padding:56px 24px 80px}.app-header{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:26px 32px;margin-bottom:44px;border-radius:22px;background:var(--surface);box-shadow:9px 9px 20px var(--shadow-dark),-6px -6px 16px var(--shadow-light)}.app-header h1{font-size:1.7em;font-weight:700;letter-spacing:-.02em;color:var(--cyan);text-shadow:0 0 18px rgba(70,224,255,.55),0 0 40px rgba(70,224,255,.25)}.app-header .subtitle{font-size:.85em;color:#fff6;margin-top:6px}.upload-btn{position:relative;display:inline-flex;align-items:center;gap:8px;padding:.75em 1.6em;border-radius:14px;font-weight:600;font-size:.95em;color:var(--cyan);background:var(--surface);box-shadow:6px 6px 14px var(--shadow-dark),-4px -4px 10px var(--shadow-light),0 0 #46e0ff00;transition:box-shadow .25s ease,color .25s ease,transform .15s ease;cursor:pointer;white-space:nowrap}.upload-btn:hover{box-shadow:6px 6px 14px var(--shadow-dark),-4px -4px 10px var(--shadow-light),0 0 22px #46e0ff73;color:#a6f2ff}.upload-btn:active{box-shadow:inset 4px 4px 10px var(--shadow-dark),inset -3px -3px 8px var(--shadow-light)}.upload-btn.disabled{opacity:.5;pointer-events:none}.error-banner{padding:16px 22px;border-radius:16px;margin-bottom:28px;background:var(--surface);color:var(--magenta);box-shadow:inset 4px 4px 10px var(--shadow-dark),inset -3px -3px 8px var(--shadow-light),0 0 20px #ff3fc626}.empty-state{text-align:center;color:#ffffff73;margin-top:100px;font-size:1.05em}.empty-state .empty-icon{font-size:2.6em;display:block;margin-bottom:16px;opacity:.6}.deck-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:26px}.deck-card{position:relative;border-radius:20px;padding:24px;display:flex;flex-direction:column;gap:14px;background:var(--surface);box-shadow:9px 9px 20px var(--shadow-dark),-6px -6px 16px var(--shadow-light);transition:box-shadow .3s ease,transform .3s ease;animation:fadeInUp .5s ease both}.deck-card:hover{transform:translateY(-4px);box-shadow:12px 12px 26px var(--shadow-dark),-8px -8px 18px var(--shadow-light),0 0 26px #46e0ff2e}.deck-preview{position:relative;width:100%;aspect-ratio:16 / 9;overflow:hidden;border-radius:12px;background:#05070d;box-shadow:inset 4px 4px 10px var(--shadow-dark),inset -3px -3px 8px var(--shadow-light)}.deck-preview iframe{position:absolute;top:0;left:0;border:none;transform-origin:top left;pointer-events:none}.deck-title{font-weight:600;font-size:1.05em;word-break:break-word;color:#ffffffeb}.deck-meta{font-size:.82em;color:#ffffff61}.deck-actions{display:flex;gap:12px;margin-top:auto;padding-top:6px}.present-btn,.delete-btn{flex:1;padding:.65em 1em;border-radius:13px;font-size:.9em;font-weight:600;border:none;background:var(--surface);transition:box-shadow .2s ease,color .2s ease,transform .15s ease}.present-btn:active,.delete-btn:active{transform:translateY(1px);box-shadow:inset 3px 3px 8px var(--shadow-dark),inset -2px -2px 6px var(--shadow-light)}.present-btn{color:var(--cyan);box-shadow:5px 5px 12px var(--shadow-dark),-4px -4px 10px var(--shadow-light)}.present-btn:hover{box-shadow:5px 5px 12px var(--shadow-dark),-4px -4px 10px var(--shadow-light),0 0 18px #46e0ff80}.delete-btn{color:var(--magenta);box-shadow:5px 5px 12px var(--shadow-dark),-4px -4px 10px var(--shadow-light)}.delete-btn:hover{box-shadow:5px 5px 12px var(--shadow-dark),-4px -4px 10px var(--shadow-light),0 0 18px #ff3fc673}@keyframes fadeInUp{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}.present-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1000;background:#000}.present-frame{width:100%;height:100%;border:none;display:block}.present-exit{position:fixed;top:20px;right:20px;z-index:1001;width:40px;height:40px;border-radius:50%;border:none;background:#ffffff14;color:#fffc;font-size:1.1em;display:flex;align-items:center;justify-content:center;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);transition:background .2s ease,color .2s ease,opacity .2s ease;opacity:.35}.present-exit:hover{opacity:1;background:#ff3fc640;color:#fff}