:root{--bg-color:#0f172a;--surface-color:#1e293bb3;--primary-color:#3b82f6;--primary-hover:#2563eb;--text-primary:#f8fafc;--text-secondary:#94a3b8;--accent-color:#10b981;--border-radius:16px;--transition:all .3s cubic-bezier(.4, 0, .2, 1)}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-primary);flex-direction:column;min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;display:flex}.glass{background:var(--surface-color);-webkit-backdrop-filter:blur(12px);border:1px solid #ffffff1a}.hidden{opacity:0;pointer-events:none;display:none!important}.navbar{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);z-index:100;background:#0f172acc;border-bottom:1px solid #ffffff0d;justify-content:space-between;align-items:center;padding:1rem 2rem;display:flex;position:sticky;top:0}.logo h1{background:linear-gradient(135deg,#60a5fa,#a78bfa);-webkit-text-fill-color:transparent;-webkit-background-clip:text;font-size:1.5rem;font-weight:700}.controls{align-items:center;gap:1.5rem;display:flex}.session-banner{background:linear-gradient(90deg,#10b98133,#0f172a00);border-bottom:1px solid #10b9814d;justify-content:space-between;align-items:center;padding:.75rem 2rem;animation:.3s ease-out slideDown;display:flex}@keyframes slideDown{0%{transform:translateY(-100%)}to{transform:translateY(0)}}.release-btn{color:#ef4444;cursor:pointer;transition:var(--transition);background:#ef444433;border:1px solid #ef4444;border-radius:8px;padding:.5rem 1rem;font-weight:600}.release-btn:hover{color:#fff;background:#ef4444}.main-container{flex:1;justify-content:center;align-items:center;padding:2rem;display:flex}.dropzone{aspect-ratio:1;border-radius:var(--border-radius);text-align:center;width:100%;max-width:600px;transition:var(--transition);background:radial-gradient(circle,#1e293b66 0%,#0f172a00 100%);border:2px dashed #fff3;justify-content:center;align-items:center;display:flex}.dropzone:hover,.dropzone.dragover{border-color:var(--primary-color);background:radial-gradient(circle,#3b82f61a 0%,#0f172a00 100%);transform:scale(1.02)}.upload-icon{filter:drop-shadow(0 0 10px #3b82f680);margin-bottom:1rem;font-size:4rem}.drop-content h2{margin-bottom:.5rem;font-size:1.8rem}.drop-content p{color:var(--text-secondary);margin-bottom:2rem}.browse-btn{background:var(--primary-color);color:#fff;cursor:pointer;transition:var(--transition);border:none;border-radius:8px;padding:.75rem 2rem;font-size:1rem;font-weight:600}.browse-btn:hover{background:var(--primary-hover);transform:translateY(-2px);box-shadow:0 4px 12px #3b82f64d}.modal{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1000;transition:var(--transition);background:#0009;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal-content{background:var(--bg-color);border-radius:var(--border-radius);border:1px solid #ffffff1a;max-width:400px;padding:2rem;box-shadow:0 20px 25px -5px #00000080}.modal-content h2{margin-bottom:1rem}.modal-content p{color:var(--text-secondary);margin-bottom:1rem;line-height:1.6}.primary-btn{background:var(--primary-color);color:#fff;cursor:pointer;border:none;border-radius:8px;width:100%;margin-top:1rem;padding:.75rem 1.5rem;font-weight:700}.toggle-switch{display:inline-block;position:relative}.toggle-switch input[type=checkbox]{display:none}.toggle-switch label{background:var(--surface-color);cursor:pointer;-webkit-user-select:none;user-select:none;transition:var(--transition);text-align:center;border:1px solid #ffffff1a;border-radius:20px;min-width:80px;padding:.5rem 1rem;font-weight:600;display:inline-block}.toggle-switch label:hover{background:#ffffff1a}.toggle-switch input:checked+label{border-color:var(--primary-color);background:#3b82f633}.toggle-switch input:checked+label .color-text{color:#60a5fa;display:inline}.toggle-switch input:checked+label .bw-text,.toggle-switch input:not(:checked)+label .color-text{display:none}.toggle-switch input:not(:checked)+label .bw-text{color:#a78bfa;display:inline}.logo-group{align-items:center;gap:.75rem;display:flex}.icon-btn{cursor:pointer;background:0 0;border:none;justify-content:center;align-items:center;padding:0;font-size:1.5rem;transition:transform .2s;display:flex}.icon-btn:hover{transform:scale(1.1)}@media (width<=600px){.navbar{flex-direction:column;align-items:flex-start;gap:1rem;padding:1rem}.controls{justify-content:space-between;width:100%}}