:root {
  --bg: #0f1216; --panel: rgba(18, 22, 28, 0.92); --line: #2a313b; --text: #e8ecf1; --muted: #9aa6b2;
  --accent: #5aa9ff; --ok: #6fcf97; --err: #ff7b72;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--text);
  font: 14px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; overflow: hidden; }
#container { position: fixed; inset: 0; }
#panel { position: fixed; top: 16px; left: 16px; bottom: 16px; width: min(380px, calc(100vw - 32px)); overflow-y: auto;
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; backdrop-filter: blur(6px); }
h1 { font-size: 18px; margin: 0 0 2px; }
.sub { margin: 0 0 12px; color: var(--muted); }
label { display: block; margin: 12px 0 4px; color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
input[type=url], textarea, select { width: 100%; background: #0b0e12; color: var(--text); border: 1px solid var(--line);
  border-radius: 8px; padding: 8px 10px; font: inherit; }
textarea { resize: vertical; }
.row { display: flex; gap: 8px; margin-top: 8px; align-items: center; }
.row select { flex: 0 0 104px; }
button { background: #1c232c; color: var(--text); border: 1px solid var(--line); border-radius: 8px; padding: 7px 12px;
  font: inherit; cursor: pointer; }
button:hover { border-color: #3b4552; }
button.primary { flex: 1; background: var(--accent); color: #051224; border: 0; font-weight: 600; }
button:disabled { opacity: .5; cursor: wait; }
#status { min-height: 20px; margin-top: 8px; color: var(--muted); word-break: break-word; }
#status.ok { color: var(--ok); } #status.err { color: var(--err); }
#result { margin-top: 10px; border-top: 1px solid var(--line); padding-top: 10px; }
#samples { display: flex; gap: 6px; margin-bottom: 8px; }
#samples button { padding: 4px 10px; } #samples button.on { border-color: var(--accent); color: var(--accent); }
.kv { margin: 6px 0; } .kv span { color: var(--muted); font-size: 12px; }
.kv p { margin: 2px 0 0; }
.kv code { display: block; margin-top: 2px; font: 12px/1.4 ui-monospace, Menlo, monospace; color: #cfd8e3; word-break: break-word; }
#timing { color: var(--muted); font-size: 12px; margin-top: 6px; }
.player { display: flex; gap: 6px; align-items: center; margin-top: 14px; flex-wrap: wrap; }
.player #scrub { flex: 1; min-width: 90px; }
.player select { width: auto; padding: 4px 6px; }
.player .loop { margin: 0; text-transform: none; font-size: 13px; letter-spacing: 0; display: flex; gap: 4px; align-items: center; }
#examples { display: flex; flex-wrap: wrap; gap: 6px; }
#examples button { padding: 4px 9px; font-size: 13px; }
.small { font-size: 13px; }
.file { margin: 0; text-transform: none; letter-spacing: 0; font-size: 13px; color: var(--text); cursor: pointer;
  border: 1px solid var(--line); border-radius: 8px; padding: 7px 12px; flex: 1; text-align: center; }
.file input { display: none; }
.foot { color: var(--muted); font-size: 11px; margin-top: 14px; }
.foot a { color: var(--accent); }