:root { --bg:#0b0b0b; --fg:#eee; --accent:#4caf50; }
* { box-sizing: border-box; }
html, body { margin:0; padding:0; background:var(--bg); color:var(--fg); font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial, "Apple Color Emoji", "Segoe UI Emoji"; }
header { padding: 12px 16px; border-bottom: 1px solid #222; }
h1 { margin: 0 0 4px; font-size: 18px; }
main { padding: 12px; }
section { margin-bottom: 16px; }
.controls { display:flex; gap:8px; margin-top:8px; }
button, .upload { background: #222; color: var(--fg); border: 1px solid #333; padding: 10px 12px; border-radius: 8px; font-size: 16px; }
button:disabled { opacity: 0.6; }
.upload input { display:none; }
.hidden { display:none; }
canvas, img { width: 100%; max-width: 480px; border-radius: 8px; background: #000; }
#canvas { touch-action: none; -ms-touch-action: none; margin: 4px 0; }
.hint { margin-top: 8px; font-size: 14px; color: #aaa; }
.status { margin-top: 6px; font-size: 13px; color: #ccc; }
.panel { margin-top: 10px; }
.panel .grid { display: grid; grid-template-columns: repeat(2, minmax(160px, 1fr)); gap: 8px; margin-top: 8px; }
.panel label { display: flex; align-items: center; justify-content: space-between; gap: 8px; font-size: 14px; }
.panel input[type=number], .panel select { flex: 1; padding: 6px 8px; background: #111; color: var(--fg); border: 1px solid #333; border-radius: 6px; }
#annotate { position: relative; }
#annotateWrap { position: relative; }
.preview { position: absolute; top: 0; right: 0; width: 40%; max-width: 260px; border: 1px solid #333; border-radius: 8px; padding: 6px; background: rgba(0,0,0,0.25); backdrop-filter: blur(2px); }
.preview img { width: 100%; display: block; border-radius: 4px; }
.preview-title { font-size: 12px; color: #aaa; margin-bottom: 4px; }