/* Eltham CS Lab — shared UI (navy / gold house style) */
:root {
  --navy: #0A1B2E; --mid: #163351; --gold: #C89B3C; --lgold: #E3C783; --page: #F7F8FA;
  --border: #D7E3EF; --body: #1A1D21; --muted: #555D68; --blue: #2A5A8C;
  --green: #1F7A4D; --green-bg: #E6F4EC; --red: #B3261E; --red-bg: #FCE9E7; --amber-bg: #FDF1D9;
  --mono: Menlo, Consolas, 'Courier New', monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--page); color: var(--body);
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif; overflow: hidden; }
.app { display: grid; grid-template-columns: 330px 1fr; height: 100%; }
.app.wide-panel { grid-template-columns: 360px 1fr; }
.panel > * { flex-shrink: 0; }
.panel { padding: 12px 14px; display: flex; flex-direction: column; gap: 8px; overflow: auto;
  border-right: 2px solid var(--border); background: #fff; }
.stage { position: relative; min-width: 0; min-height: 0; }
.stage canvas { display: block; width: 100%; height: 100%; touch-action: none; cursor: grab; }
.eyebrow { font-size: 12px; letter-spacing: 2.5px; font-weight: 700; color: #8A6520; text-transform: uppercase; }
h1 { font-family: Georgia, serif; font-size: 19px; line-height: 1.15; color: var(--navy); margin: 2px 0 0; }
.code { background: var(--navy); border-left: 5px solid var(--gold); border-radius: 8px; padding: 6px 0;
  font-family: var(--mono); font-size: 13.5px; line-height: 1.42; color: #fff; }
.code .ln { white-space: pre; padding: 0 12px; border-left: 3px solid transparent; transition: background .2s; }
.code .ln.on { background: rgba(200,155,60,.30); border-left-color: var(--lgold); }
.code .ln.yes { background: rgba(31,122,77,.45); border-left-color: #7FD1A6; }
.code .ln.no { background: rgba(179,38,30,.35); border-left-color: #F0A39C; }
.code .ln.skip { opacity: .35; }
.code .op { cursor: pointer; border-bottom: 2px dashed var(--lgold); padding: 0 2px; border-radius: 3px; }
.code .op:hover { background: rgba(227,199,131,.25); }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
label.slider { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 15px; }
input[type=range] { flex: 1; accent-color: var(--gold); min-width: 120px; }
.val { font-family: var(--mono); font-weight: 700; background: var(--lgold); color: var(--navy);
  border-radius: 999px; padding: 3px 12px; min-width: 104px; text-align: center; font-size: 14px; }
button { font: inherit; font-weight: 700; font-size: 14px; letter-spacing: .5px; border: 0; border-radius: 999px;
  padding: 8px 16px; background: var(--navy); color: var(--lgold); cursor: pointer; }
button:hover { background: var(--mid); }
button.ghost { background: #fff; color: var(--navy); border: 2px solid var(--border); padding: 6px 12px; }
button.chip { padding: 5px 11px; font-family: var(--mono); font-size: 13px; background: #EEF3F8; color: var(--navy); }
button.chip:hover { background: var(--border); }
button:disabled { opacity: .45; cursor: default; }
.toggle { display: inline-flex; border: 2px solid var(--border); border-radius: 999px; overflow: hidden; }
.toggle button { border-radius: 0; background: #fff; color: var(--navy); padding: 6px 12px; }
.toggle button.sel { background: var(--navy); color: var(--lgold); }
.out { background: #fff; border: 2px solid var(--border); border-radius: 8px; padding: 8px 12px; font-family: var(--mono);
  font-size: 14px; min-height: 38px; }
.out .muted, .muted { color: #9AA5B1; font-family: system-ui, sans-serif; font-size: 13px; }
.out-label { font-size: 11px; letter-spacing: 2px; font-weight: 700; color: var(--blue); }
.note { background: var(--amber-bg); border: 2px solid #F0DDAA; border-radius: 8px; padding: 8px 12px; font-size: 13.5px; line-height: 1.4; }
.note.good { background: var(--green-bg); border-color: #B9DEC8; }
.note.bad { background: var(--red-bg); border-color: #F0C2BE; }
.stat { font-size: 13px; color: var(--muted); }
.stat b { color: var(--navy); font-family: var(--mono); }
.badge { position: absolute; left: 12px; bottom: 10px; font-size: 12px; color: var(--muted); background: rgba(255,255,255,.8);
  padding: 3px 9px; border-radius: 999px; pointer-events: none; }
@media (max-height: 520px) { .eyebrow { display: none; } h1 { font-size: 17px; } .note { font-size: 12.5px; padding: 6px 10px; } .panel { gap: 7px; } }
@media (max-width: 760px) { .app, .app.wide-panel { grid-template-columns: 1fr; grid-template-rows: auto 1fr; } .panel { border-right: 0; border-bottom: 2px solid var(--border); max-height: 55%; } }