:root{--bg:#f8f6f0;--bg-card:#fff;--bg-surface:#f2efe6;--bg-overlay:#ece9e0;--border:#e0dbd0;--border-hover:#c8c1b0;--text:#1a1710;--text-secondary:#5a5242;--text-muted:#9a9080;--accent:#d97706;--accent-rgb:217, 119, 6;--accent-dim:#d977061a;--accent-hover:#b45309;--accent-contrast:#fff;--danger:#dc2626;--danger-dim:#dc262614;--success:#16a34a;--success-rgb:22, 163, 74;--success-dim:#16a34a1a;--warning:#d97706;--radius:8px;--radius-sm:4px;--radius-lg:12px;--font-display:"Syne", sans-serif;--font-mono:"DM Mono", "JetBrains Mono", "Fira Code", ui-monospace, monospace;--transition:.15s ease;--shadow:0 2px 12px #00000012;--shadow-lg:0 6px 32px #0000001c;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}:root[data-theme=dark]{--bg:#0c0c0e;--bg-card:#1c1c21;--bg-surface:#141417;--bg-overlay:#242429;--border:#ffffff12;--border-hover:#ffffff24;--text:#f0ede8;--text-secondary:#8a8790;--text-muted:#4e4c56;--accent:#e8a23a;--accent-rgb:232, 162, 58;--accent-dim:#e8a23a26;--accent-hover:#f0b558;--accent-contrast:#1a1208;--danger:#e85555;--danger-dim:#e855551f;--success:#4ade80;--success-rgb:74, 222, 128;--success-dim:#4ade801a;--warning:#fbbf24;--shadow:none;--shadow-lg:0 8px 32px #00000059}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:var(--font-mono);background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;min-height:100vh;transition:background var(--transition), color var(--transition);line-height:1.6}h1,h2,h3,h4{font-family:var(--font-display);letter-spacing:-.02em;font-weight:700}a{color:var(--accent);text-decoration:none}a:hover{color:var(--accent-hover)}button{cursor:pointer;color:inherit;background:0 0;border:none;font-family:inherit}input,textarea,select{font-family:inherit;font-size:inherit;color:var(--text);background:var(--bg-overlay);border:1px solid var(--border);border-radius:var(--radius-sm);width:100%;transition:border-color var(--transition);outline:none;padding:10px 14px}input:focus,textarea:focus,select:focus{border-color:var(--accent)}input::placeholder,textarea::placeholder{color:var(--text-muted)}select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%239a9080' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");background-position:right 10px center;background-repeat:no-repeat;background-size:13px;padding-right:30px}:root[data-theme=dark] select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238a8790' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E")}.btn{border-radius:var(--radius-sm);transition:background var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition), opacity var(--transition);white-space:nowrap;justify-content:center;align-items:center;gap:8px;min-height:44px;padding:10px 20px;font-size:14px;font-weight:600;display:inline-flex}.btn-primary{background:var(--accent);color:var(--accent-contrast);box-shadow:0 1px 4px rgba(var(--accent-rgb), .25)}.btn-primary:hover{background:var(--accent-hover);color:var(--accent-contrast)}.btn-primary:active{box-shadow:none;transform:translateY(0)}.btn-primary:disabled{opacity:.5;cursor:not-allowed;box-shadow:none;transform:none}.btn-ghost{color:var(--text-secondary);border:1px solid var(--border);background:0 0}.btn-ghost:hover{border-color:var(--border-hover);color:var(--text);background:var(--bg-surface)}.btn-sm{min-height:32px;padding:6px 12px;font-size:12px}.btn-lg{padding:14px 28px;font-size:16px}.icon-btn{border-radius:var(--radius-sm);width:30px;height:30px;color:var(--text-secondary);transition:background var(--transition), color var(--transition);background:0 0;flex-shrink:0;justify-content:center;align-items:center;display:inline-flex}.icon-btn:hover{background:var(--bg-surface);color:var(--text)}.icon-btn.danger:hover{background:var(--danger-dim);color:var(--danger)}.icon-btn.active{background:var(--accent-dim);color:var(--accent)}.icon-btn:disabled{opacity:.35;cursor:not-allowed}.icon-btn:disabled:hover{color:var(--text-secondary);background:0 0}.icon-btn-sm{width:24px;height:24px}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:24px}.form-group{flex-direction:column;gap:6px;display:flex}.form-label{color:var(--text-secondary);font-size:13px;font-weight:500}.form-error{color:var(--danger);font-size:12px}.muted{color:var(--text-muted)}.container{max-width:1100px;margin:0 auto;padding:0 24px}@media (width<=480px){.container{padding:0 16px}.btn-lg{padding:12px 20px;font-size:15px}}.page-center{justify-content:center;align-items:center;min-height:100vh;padding:24px;display:flex}.alert{border-radius:var(--radius-sm);padding:12px 16px;font-size:13px}.alert-error{background:var(--danger-dim);color:var(--danger);border:1px solid #dc262633}.alert-success{background:var(--success-dim);color:var(--success);border:1px solid rgba(var(--success-rgb), .2)}@media (hover:none){.video-delete,.fullscreen-btn,.loop-action,.vn-delete,.note-delete{opacity:1!important}}@media (pointer:coarse){.icon-btn{width:38px;height:38px}.icon-btn-sm{width:32px;height:32px}}