*{margin:0;padding:0;box-sizing:border-box}
html,body{width:100%;height:100%;overflow:hidden;font-family:-apple-system,system-ui,sans-serif;background:#222;touch-action:none;-webkit-user-select:none;user-select:none}

/* Canvas layers */
#canvas-wrap{position:fixed;inset:0}
#canvas,#overlay{position:absolute;top:0;left:0;width:100%;height:100%}
#overlay{pointer-events:none}

/* Toolbar */
#toolbar{
    position:fixed;left:10px;top:50%;transform:translateY(-50%);
    background:rgba(24,24,28,.92);border-radius:10px;padding:10px;
    display:flex;flex-direction:column;gap:10px;z-index:10;
    backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
    box-shadow:0 2px 12px rgba(0,0,0,.4);
    transition:opacity .25s;
}
#tools{display:flex;flex-direction:column;gap:4px}
.tool-btn{
    width:38px;height:38px;border:2px solid #444;border-radius:8px;
    background:#2a2a2e;color:#ddd;font-size:15px;font-weight:700;
    cursor:pointer;display:flex;align-items:center;justify-content:center;
    transition:border-color .15s,background .15s;
}
.tool-btn:hover{border-color:#777}
.tool-btn.active{border-color:#5af;background:#1e3450}

/* Brush size */
#brush-ctrl{display:flex;flex-direction:column;align-items:center;gap:3px;color:#888;font-size:11px}
#brush-ctrl input[type=range]{width:38px;accent-color:#5af}

/* Color preview */
#color-preview{
    width:38px;height:24px;border-radius:6px;
    border:2px solid #555;background:#000;
    transition:background .1s;
}

/* Palette */
#palette-wrap{border-radius:4px}
#palette{display:grid;grid-template-columns:repeat(4,1fr);gap:2px}
.swatch{
    width:20px;height:20px;border-radius:3px;cursor:pointer;
    border:2px solid transparent;transition:border-color .1s;
}
.swatch:hover{border-color:rgba(255,255,255,.6)}
.swatch.active{border-color:#5af;box-shadow:0 0 4px #5af}

/* Zoom indicator */
#zoom-indicator{
    position:fixed;top:10px;right:10px;
    background:rgba(24,24,28,.85);color:#aaa;
    padding:5px 10px;border-radius:6px;font-size:12px;
    z-index:10;pointer-events:none;backdrop-filter:blur(6px);
}

/* Rate limit indicator */
#rate-indicator{
    position:fixed;top:10px;left:50%;transform:translateX(-50%);
    background:rgba(200,50,50,.85);color:#fff;
    padding:5px 14px;border-radius:6px;font-size:12px;
    z-index:10;opacity:0;transition:opacity .3s;pointer-events:none;
}

/* Timeline */
#timeline-bar{
    position:fixed;bottom:12px;left:70px;right:70px;
    display:flex;align-items:center;gap:8px;
    background:rgba(24,24,28,.9);padding:7px 14px;border-radius:12px;
    z-index:10;backdrop-filter:blur(6px);
    box-shadow:0 2px 8px rgba(0,0,0,.3);
}
.tl-date{color:#666;font-size:10px;white-space:nowrap}
#tl-slider-wrap{flex:1;min-width:0;position:relative}
#tl-slider-wrap input[type=range]{width:100%;accent-color:#5af}
#tl-tooltip{
    position:absolute;top:-24px;padding:2px 6px;border-radius:4px;
    background:rgba(24,24,28,.95);color:#999;font-size:10px;white-space:nowrap;
    pointer-events:none;transform:translateX(-50%);display:none;
}
#timeline-label{font-size:11px;white-space:nowrap;min-width:28px;text-align:right}
#timeline-label.live{color:#e44}
#timeline-label.hist{color:#888}
#tl-loading{width:100%;height:2px;border-radius:1px;overflow:hidden;display:none;position:absolute;bottom:0;left:0}
#tl-loading.active{display:block}
#tl-loading::after{content:'';display:block;width:30%;height:100%;background:#5af;border-radius:1px;animation:tl-slide 1.2s ease-in-out infinite}
@keyframes tl-slide{0%{transform:translateX(-100%)}100%{transform:translateX(430%)}}

/* Mobile */
@media(max-width:600px){
    #toolbar{left:5px;padding:6px;gap:6px}
    .tool-btn{width:30px;height:30px;font-size:12px}
    #color-preview{width:30px;height:18px}
    .swatch{width:12px;height:12px}
    #brush-ctrl input[type=range]{width:30px}
    #timeline-bar{left:50px;right:6px;padding:5px 8px}
    .tl-date{font-size:9px}
}