:root{--bg-color: #0a0a0c;--panel-color: #141418;--accent-color: #5850ec;--text-color: #e4e4e7;--highlight: #f43f5e;--border: #27272a;--font-ui: "Inter", system-ui, sans-serif;--font-mono: "JetBrains Mono", monospace}*{box-sizing:border-box}body,html{margin:0;padding:0;height:100%;font-family:var(--font-ui);background-color:var(--bg-color);color:var(--text-color);overflow:hidden;display:flex;flex-direction:column}.app-header{background:var(--panel-color);padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border);backdrop-filter:blur(10px)}.logo .brand{font-weight:800;letter-spacing:-.05em;font-size:1.2rem;color:#fff}.logo .sub{font-size:.7rem;color:var(--accent-color);margin-left:.5rem}.transport-controls{display:flex;align-items:center;gap:.75rem}.btn-action{background:#27272a;color:#fff;border:none;padding:.6rem 1rem;border-radius:6px;cursor:pointer;font-weight:500;transition:all .2s}.btn-action:hover{background:#3f3f46}.btn-primary{background:var(--accent-color);color:#fff;border:none;padding:.6rem 1rem;border-radius:6px;font-weight:600;cursor:pointer}.btn-primary:hover{opacity:.9}.divider{width:1px;height:24px;background:var(--border);margin:0 .5rem}.timeline{flex:1;padding:2rem;overflow-y:auto}.empty-state{text-align:center;margin-top:15vh;color:#71717a}.track-container{background:var(--panel-color);border:1px solid var(--border);border-radius:12px;padding:2rem;margin-bottom:2rem}.canvas-wrapper{position:relative;cursor:crosshair;background:#000;border-radius:8px;overflow:hidden}canvas{display:block;width:100%;height:200px}.anchor{position:absolute;top:0;bottom:0;width:2px;background:var(--highlight);z-index:10}.anchor:after{content:"";position:absolute;top:0;left:-6px;border-left:7px solid transparent;border-right:7px solid transparent;border-top:12px solid var(--highlight)}.app-footer{padding:.75rem 2rem;border-top:1px solid var(--border);background:var(--bg-color);display:flex;justify-content:space-between;font-family:var(--font-mono);font-size:.75rem;color:#71717a}