:root{--bg-dark:#0f172a;--card-bg:#1e293bb3;--card-border:#ffffff1a;--text-main:#f8fafc;--text-muted:#94a3b8;--accent:#06b6d4;--accent-hover:#0891b2}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-dark);color:var(--text-main);min-height:100vh;font-family:Inter,system-ui,-apple-system,sans-serif;overflow-x:hidden}.gallery-container{max-width:1200px;margin:0 auto;padding:4rem 2rem}.gallery-header{text-align:center;margin-bottom:4rem}.gallery-header h1{background:linear-gradient(135deg,#fff,#94a3b8);-webkit-text-fill-color:transparent;-webkit-background-clip:text;margin-bottom:1rem;font-size:2.5rem;font-weight:700}.gallery-header p{color:var(--text-muted);font-size:1.1rem}.grid{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:2rem;display:grid}.card{background:var(--card-bg);border:1px solid var(--card-border);cursor:pointer;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:16px;flex-direction:column;gap:1rem;padding:2rem;transition:all .3s cubic-bezier(.4,0,.2,1);display:flex}.card:hover{border-color:var(--accent);transform:translateY(-5px);box-shadow:0 10px 30px -10px #06b6d44d}.card-icon{width:48px;height:48px;color:var(--accent);background:#06b6d41a;border-radius:12px;justify-content:center;align-items:center;margin-bottom:.5rem;display:flex}.card h3{font-size:1.25rem;font-weight:600;line-height:1.4}.card p{color:var(--text-muted);font-size:.9rem}.presenter-container{background:#000;justify-content:center;align-items:center;width:100vw;height:100vh;display:flex;position:fixed;top:0;left:0;overflow:hidden}.canvas-wrapper{justify-content:center;align-items:center;width:100%;height:100%;display:flex;position:relative}canvas{object-fit:contain;max-width:100%;max-height:100%;box-shadow:0 0 50px #00000080}.toolbar{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);opacity:0;z-index:50;background:#0f172acc;border:1px solid #ffffff1a;border-radius:999px;align-items:center;gap:1.5rem;padding:.5rem 1.5rem;transition:opacity .3s;display:flex;position:absolute;bottom:2rem;left:50%;transform:translate(-50%)}.presenter-container:hover .toolbar,.toolbar:focus-within{opacity:1}.toolbar-btn{color:var(--text-main);cursor:pointer;background:0 0;border:none;border-radius:50%;justify-content:center;align-items:center;padding:.5rem;transition:all .2s;display:flex}.toolbar-btn:hover{color:var(--accent);background:#ffffff1a}.page-info{font-variant-numeric:tabular-nums;color:var(--text-main);font-size:.9rem;font-weight:500}.loader{color:var(--accent);flex-direction:column;align-items:center;gap:1rem;display:flex}.spinner{border:3px solid #06b6d433;border-top-color:var(--accent);border-radius:50%;width:40px;height:40px;animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.tabs-container{justify-content:center;gap:1rem;margin-bottom:3rem;display:flex}.tab-btn{background:var(--card-bg);border:1px solid var(--card-border);color:var(--text-muted);cursor:pointer;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:999px;padding:.75rem 2rem;font-size:1.1rem;font-weight:600;transition:all .3s}.tab-btn:hover{color:var(--text-main);border-color:#06b6d480}.tab-btn.active{border-color:var(--accent);color:var(--accent);background:#06b6d426;box-shadow:0 0 20px #06b6d433}.chapter-section{margin-bottom:3rem}.chapter-header{border-bottom:1px solid var(--card-border);align-items:center;gap:1rem;margin-bottom:1.5rem;padding-bottom:1rem;display:flex}.chapter-badge{background:linear-gradient(135deg, var(--accent), var(--accent-hover));color:#fff;text-transform:uppercase;letter-spacing:1px;border-radius:6px;padding:.25rem .75rem;font-size:.9rem;font-weight:700}.chapter-title{color:var(--text-main);font-size:1.5rem;font-weight:600}