:root {
  --bg: #f7f7f5;
  --surface: #ffffff;
  --ink: #1c1c1a;
  --muted: #5f5f58;
  --line: #d9d9d2;
  --accent: #1f5f8b;
  --accent-soft: #e8f0f6;
  --accent-2: #b8860b;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,.07), 0 6px 18px rgba(0,0,0,.04);
  --maxw: 1180px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; font-family: var(--font); color: var(--ink); background: var(--bg);
  line-height: 1.55; font-size: 16px; -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.2; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* Header / nav */
.site-header { background: var(--surface); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 50; }
.site-header .wrap { display: flex; align-items: center; gap: 18px; min-height: 60px; flex-wrap: wrap; }
.brand { font-weight: 700; font-size: 1.05rem; color: var(--ink); white-space: nowrap; }
.brand:hover { text-decoration: none; }
.nav { display: flex; gap: 4px; flex-wrap: wrap; margin-left: auto; align-items: center; }
.nav a { color: var(--muted); padding: 7px 11px; border-radius: 7px; font-size: .94rem; }
.nav a:hover { background: var(--accent-soft); color: var(--accent); text-decoration: none; }
.nav a.active { color: var(--accent); font-weight: 600; }
.lang-btn { border: 1px solid var(--line); background: var(--surface); color: var(--ink); border-radius: 7px;
  padding: 6px 12px; cursor: pointer; font: inherit; font-size: .88rem; font-weight: 600; }
.lang-btn:hover { border-color: var(--accent); color: var(--accent); }

/* Buttons */
.btn { display: inline-block; border: 1px solid var(--accent); background: var(--accent); color: #fff;
  padding: 10px 18px; border-radius: 8px; font: inherit; font-weight: 600; cursor: pointer; }
.btn:hover { filter: brightness(1.07); text-decoration: none; }
.btn.secondary { background: var(--surface); color: var(--accent); }
.btn.ghost { background: transparent; border-color: var(--line); color: var(--ink); }
.btn.ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn.small { padding: 6px 12px; font-size: .85rem; }

/* Sections */
main { padding: 32px 0 64px; }
.section { margin: 0 0 38px; }
.section > h2 { font-size: 1.45rem; margin: 0 0 12px; }
.lede { font-size: 1.08rem; color: var(--muted); max-width: 760px; }

/* Hero */
.hero { background: linear-gradient(180deg, var(--accent-soft), var(--bg)); border-bottom: 1px solid var(--line); padding: 56px 0 44px; }
.hero h1 { font-size: 2.4rem; margin: 0 0 12px; }
.hero p { font-size: 1.15rem; color: var(--muted); max-width: 680px; margin: 0 0 24px; }
.hero .cta-row { display: flex; gap: 12px; flex-wrap: wrap; }

/* Cards grid */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); }
.card h3 { margin: 0 0 8px; font-size: 1.08rem; }
.card p { margin: 0 0 10px; color: var(--muted); font-size: .95rem; }
.steps { counter-reset: s; display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(240px,1fr)); }
.steps .card { position: relative; }
.steps .card::before { counter-increment: s; content: counter(s); display:inline-flex; align-items:center; justify-content:center;
  width: 30px; height: 30px; border-radius: 50%; background: var(--accent); color:#fff; font-weight:700; margin-bottom: 10px; }

.tag { display: inline-block; background: var(--accent-soft); color: var(--accent); border-radius: 999px;
  padding: 2px 10px; font-size: .76rem; margin: 0 4px 4px 0; }
.pill { display:inline-block; background:#efeee8; color: var(--muted); border-radius: 999px; padding: 2px 10px; font-size:.76rem; }

/* ---------------- Canvas ---------------- */
.canvas-toolbar { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin: 0 0 16px; }
.canvas-toolbar .spacer { flex: 1; }
.save-hint { color: var(--muted); font-size: .82rem; }
.topic-note { background: var(--accent-soft); border: 1px solid var(--accent); color: var(--accent); border-radius: 8px;
  padding: 8px 12px; margin: 0 0 14px; font-size: .9rem; }

.canvas { background: var(--surface); border: 2px solid var(--ink); border-radius: 6px; overflow: hidden; }
.canvas-head { display: grid; grid-template-columns: 1.3fr 2fr 0.8fr; border-bottom: 2px solid var(--ink); }
.canvas-head .cell { border-right: 1px solid var(--line); padding: 8px 10px; }
.canvas-head .cell:last-child { border-right: none; }
.canvas-head label { display:block; font-weight:700; font-style: italic; font-size: .82rem; margin-bottom: 2px; }
.canvas-head input { width: 100%; border: none; font: inherit; padding: 4px 2px; background: transparent; }
.canvas-head input:focus { outline: 2px solid var(--accent-soft); }

.canvas-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 0.95fr; }
.canvas-col { display: grid; border-right: 1px solid var(--line); }
.canvas-col:last-child { border-right: none; }
.cbox { padding: 10px 11px; border-bottom: 1px solid var(--line); display: flex; flex-direction: column; }
.cbox:last-child { border-bottom: none; }
.cbox .field-head { display:flex; align-items:center; justify-content: space-between; gap: 6px; }
.cbox label { font-weight: 700; font-style: italic; font-size: .86rem; }
.cbox .hint { font-size: .74rem; color: var(--muted); margin: 3px 0 6px; }
.cbox textarea { width: 100%; border: 1px solid var(--line); border-radius: 6px; font: inherit; font-size: .9rem;
  padding: 7px; resize: vertical; min-height: 90px; flex: 1; background: #fcfcfb; }
.cbox.tall textarea { min-height: 230px; }
.cbox textarea:focus { outline: none; border-color: var(--accent); background: #fff; }
.cbox.full { border-right: none; }
.canvas-foot-row { border-top: 1px solid var(--line); }

/* AI tip disclosure */
.ai-tip { margin-top: 6px; border: 1px dashed var(--accent-2); border-radius: 6px; background: #fffdf5; }
.ai-tip summary { cursor: pointer; list-style: none; padding: 5px 9px; font-size: .78rem; font-weight: 600; color: var(--accent-2); }
.ai-tip summary::-webkit-details-marker { display:none; }
.ai-tip .ai-body { padding: 0 9px 9px; font-size: .8rem; }
.ai-tip .ai-body p { margin: 4px 0 6px; color: var(--muted); }
.ai-tip .prompt { background:#fff; border:1px solid var(--line); border-radius:6px; padding:7px; font-size:.78rem;
  white-space: pre-wrap; color: var(--ink); }
.ai-tip .copy-row { margin-top: 6px; }

.canvas-credit { display:none; }

/* ---------------- Topics ---------------- */
.topic-controls { display:flex; gap:10px; flex-wrap: wrap; align-items:center; margin: 0 0 18px; }
.topic-controls input[type=search], .topic-controls select { padding: 9px 12px; border:1px solid var(--line);
  border-radius: 8px; font: inherit; background: var(--surface); }
.topic-controls input[type=search] { min-width: 220px; flex: 1; }
.line-group { margin: 0 0 30px; }
.line-group h2 { font-size: 1.2rem; border-left: 4px solid var(--accent); padding-left: 10px; margin: 0 0 14px; }
.topic-card .levels { margin: 2px 0 8px; }
.topic-card .data { font-size: .85rem; background: var(--accent-soft); border-left: 3px solid var(--accent);
  border-radius: 6px; padding: 8px 10px; margin: 10px 0 8px; }
.topic-card .data b { color: var(--accent); }
.topic-card .scope { font-size: .85rem; background: var(--bg); border-radius:6px; padding:8px 10px; margin: 0 0 12px; }
.topic-card .scope b { color: var(--accent-2); }

/* Lists for guide/principles */
.ol-steps { padding-left: 1.2em; } .ol-steps li { margin: 6px 0; }
.rules li { margin: 6px 0; }
.prompt-block { background: var(--surface); border:1px solid var(--line); border-radius: var(--radius);
  padding: 14px; box-shadow: var(--shadow); }
.prompt-block .prompt { white-space: pre-wrap; font-size: .9rem; background: #fbfbf9; border:1px solid var(--line);
  border-radius: 6px; padding: 12px; margin: 8px 0; }
.link-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px,1fr)); gap: 10px; list-style: none; padding: 0; }
.link-list a { display:block; background: var(--surface); border:1px solid var(--line); border-radius: 8px; padding: 12px 14px;
  box-shadow: var(--shadow); font-weight: 600; }
.link-list a:hover { border-color: var(--accent); text-decoration: none; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); background: var(--surface); padding: 22px 0; color: var(--muted); font-size: .88rem; }
.site-footer .wrap { display:flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; align-items:center; }
.disclaimer { display:block; font-size: .8rem; line-height: 1.5; color: var(--muted);
  background: var(--surface); border: 1px solid var(--line); border-left: 3px solid var(--accent-2);
  border-radius: 8px; padding: 12px 14px; }

/* Responsive */
@media (max-width: 860px) {
  .canvas-grid { grid-template-columns: 1fr; }
  .canvas-col { border-right: none; border-bottom: 1px solid var(--line); }
  .canvas-head { grid-template-columns: 1fr; }
  .canvas-head .cell { border-right: none; border-bottom: 1px solid var(--line); }
  .hero h1 { font-size: 1.9rem; }
}

/* ---------------- Print: clean A4 landscape canvas ---------------- */
@media print {
  @page { size: A4 landscape; margin: 10mm; }
  .site-header, .site-footer, .canvas-toolbar, .ai-tip, .topic-note, .no-print { display: none !important; }
  body { background: #fff; font-size: 11px; }
  main { padding: 0; }
  .wrap { max-width: none; padding: 0; }
  .canvas { border: 1.5px solid #000; }
  .cbox textarea, .canvas-head input { border: none; background: #fff; resize: none; }
  .cbox.tall textarea { min-height: 150px; }
  .cbox .hint { display: none; }
  .canvas-credit { display: flex; justify-content: space-between; font-size: 9px; color: #444; margin-top: 6px; }
}