/* Shared "Bloort" dark style for the Quantum course: dots and blocks, a
   dark sandbox, amber for the active thing, cyan for a comparison or pulse.
   (Copied from lab/courses/llm/style.css, which is course-agnostic apart
   from the lesson-specific rules at the bottom.) */
:root {
  color-scheme: dark;
  --bg: #0b0b0c;
  --ink: rgba(237, 237, 230, 1);
  --ink-dim: rgba(237, 237, 230, 0.6);
  --ink-faint: rgba(237, 237, 230, 0.35);
  --panel: rgba(255, 255, 255, 0.04);
  --line: rgba(237, 237, 230, 0.12);
  --amber: #E8B84B;
  --cyan: #7CD5E8;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
  font: 14px/1.55 ui-sans-serif, -apple-system, "Segoe UI", sans-serif;
}
a { color: var(--cyan); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 980px; margin: 0 auto; padding: 28px 20px 80px; }
header.page-head { margin-bottom: 20px; }
header.page-head h1 { font-size: 22px; margin: 0 0 4px; }
header.page-head p { color: var(--ink-dim); margin: 0; }
.back-link { display: inline-block; margin-bottom: 14px; color: var(--ink-dim); font-size: 13px; }

/* Course map */
.module-group { margin-bottom: 30px; }
.module-group h2 { font-size: 16px; margin: 0 0 2px; }
.module-group .module-meta { color: var(--ink-dim); font-size: 12.5px; margin: 0 0 12px; }
.lesson-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 10px; }
.lesson-card {
  display: block;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  background: var(--panel);
}
.lesson-card.built { cursor: pointer; border-color: rgba(232, 184, 75, 0.35); }
.lesson-card.built:hover { background: rgba(232, 184, 75, 0.08); }
.lesson-card.todo { opacity: 0.5; }
.lesson-card .l-title { font-size: 13.5px; font-weight: 600; margin: 0 0 4px; }
.lesson-card .l-tag { font-size: 11px; text-transform: uppercase; letter-spacing: .04em; color: var(--ink-faint); }
.lesson-card.built .l-tag { color: var(--amber); }

/* Lesson page */
.prev-next { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 20px; }
.prev-next a.btn { max-width: 42%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.prev-next-pos { color: var(--ink-faint); font-size: 12px; flex: none; }
.btn {
  background: var(--panel);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 6px 12px;
  font: inherit;
  font-size: 13px;
  cursor: pointer;
  display: inline-block;
}
.btn:hover { background: rgba(255,255,255,.09); }

.panel-box {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  padding: 16px 18px;
  margin-bottom: 18px;
}
.explain p { font-size: 13.5px; margin: 0; white-space: pre-line; }
.try-this { margin: 0; padding-left: 18px; font-size: 13px; color: var(--ink-dim); }
.try-this li { margin: 4px 0; }
.why-it-matters { font-size: 13px; color: var(--amber); margin: 0; }

/* Sandbox shared bits */
.sandbox { display: flex; flex-direction: column; gap: 12px; }
.text-input {
  width: 100%;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  padding: 8px 10px;
  font: 13px ui-monospace, Menlo, monospace;
  resize: vertical;
}
.lesson-canvas {
  width: 100%;
  height: 360px;
  display: block;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  touch-action: none;
}
.ctl-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.ctl-btn {
  background: var(--panel);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 6px 12px;
  font: inherit;
  font-size: 13px;
  cursor: pointer;
}
.ctl-btn:hover { background: rgba(255,255,255,.09); }
.ctl-slider { flex: 1; min-width: 140px; }
.ctl-number {
  width: 70px;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink);
  padding: 5px 8px;
  font: 13px ui-monospace, Menlo, monospace;
}
.ctl-readout { font-size: 12.5px; color: var(--ink-dim); font-variant-numeric: tabular-nums; }
.ctl-readout-label { margin-right: 6px; }
.ctl-readout-value { color: var(--amber); font-weight: 600; }