/* ===================================================================
   OB Cheatsheet — Shared Theme (Warm Paper)
   ใช้ร่วมกันทุกบท เพื่อให้ maintenance ง่าย แก้ครั้งเดียวมีผลทุกไฟล์
   =================================================================== */

:root {
  /* Warm Paper Theme */
  --bg: #f5f2eb;
  --card: #ffffff;
  --border: #e0d9cc;
  --text: #1a1a1a;
  --text-2: #555;

  /* Accent colors */
  --orange: #c2410c;
  --orange-light: #fef3c7;
  --orange-dark: #9a3412;
  --teal: #0f6e56;
  --teal-light: #e1f5ee;
  --blue: #185fa5;
  --blue-light: #e6f1fb;
  --red: #a32d2d;
  --red-light: #fcebeb;
  --green: #3b6d11;
  --green-light: #eaf3de;
  --amber: #854f0b;
  --amber-light: #faeeda;
  --purple: #534ab7;
  --purple-light: #eeedfe;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'IBM Plex Sans Thai', sans-serif;
  background: var(--bg);
  color: var(--text);
  padding: 24px 16px;
  max-width: 900px;
  margin: 0 auto;
  font-size: 14px;
  line-height: 1.6;
}

/* ── Unified Top Nav ───────────────────────────────────
   ใช้ใน 4 main pages: Index / All Chapters / Theory / Map
   =================================================== */
.top-nav {
  display: flex;
  gap: 4px;
  padding: 8px 14px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-link {
  padding: 6px 12px;
  border-radius: 6px;
  text-decoration: none;
  color: var(--text);
  font-size: 13px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
  border: 1px solid transparent;
  transition: background 0.1s, border-color 0.1s;
}
.nav-link:hover {
  background: var(--bg);
  border-color: var(--border);
}
.nav-link.active {
  background: var(--orange-light);
  color: var(--orange-dark);
  font-weight: 500;
  border-color: var(--orange);
}

@media (max-width: 480px) {
  .top-nav {
    overflow-x: auto;
    flex-wrap: nowrap;
  }
  .nav-link { font-size: 12px; padding: 6px 10px; }
}

/* ── Header ──────────────────────────────────────────── */
header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 20px;
  border-bottom: 2px solid var(--orange);
  padding-bottom: 10px;
}
header h1 { font-size: 20px; font-weight: 600; color: var(--orange-dark); }
header span {
  font-size: 11px;
  color: var(--text-2);
  font-family: 'IBM Plex Mono', monospace;
}

/* ── Grid + Card ─────────────────────────────────────── */
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
}
.card.full { grid-column: 1 / -1; }
.card h2 {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-2);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.card h2::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ── Signal → Theory Table ───────────────────────────── */
.signal-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.signal-table th {
  background: #1a1a1a;
  color: #f5f2eb;
  padding: 6px 10px;
  text-align: left;
  font-size: 11px;
  font-weight: 500;
}
.signal-table td {
  padding: 7px 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  line-height: 1.5;
}
.signal-table tr:last-child td { border-bottom: none; }
.signal-table tr:hover td { background: var(--bg); }

.theory-tag {
  display: inline-block;
  background: var(--orange-dark);
  color: #fff;
  font-size: 11px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 999px;
  white-space: nowrap;
}
.formula {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--orange-dark);
  background: var(--orange-light);
  padding: 2px 6px;
  border-radius: 4px;
  display: inline-block;
  margin-top: 3px;
}

/* ── Content rows + dots ─────────────────────────────── */
.row {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  margin-bottom: 6px;
  font-size: 13px;
}
.row:last-child { margin-bottom: 0; }
.dot {
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  margin-top: 6px;
}
.d-orange { background: var(--orange); }
.d-teal { background: var(--teal); }
.d-blue { background: var(--blue); }
.d-green { background: var(--green); }
.d-red { background: var(--red); }
.d-amber { background: var(--amber); }
.d-purple { background: var(--purple); }

/* ── Tip / Warn boxes ────────────────────────────────── */
.tip {
  background: var(--teal-light);
  border-left: 3px solid var(--teal);
  border-radius: 0 6px 6px 0;
  padding: 8px 10px;
  font-size: 12px;
  color: var(--teal);
  margin-top: 8px;
}
.warn {
  background: var(--orange-light);
  border-left: 3px solid var(--orange);
  border-radius: 0 6px 6px 0;
  padding: 8px 10px;
  font-size: 12px;
  color: var(--orange-dark);
  margin-top: 8px;
}

/* ── Generic tags (pill-style) ───────────────────────── */
.tag {
  display: inline-block;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  margin: 2px;
}
.tag-blue { background: var(--blue-light); color: var(--blue); }
.tag-teal { background: var(--teal-light); color: var(--teal); }
.tag-orange { background: var(--orange-light); color: var(--orange-dark); }
.tag-amber { background: var(--amber-light); color: var(--amber); }

/* ── Mobile breakpoint ───────────────────────────────── */
@media (max-width: 600px) {
  .grid { grid-template-columns: 1fr; }
  .card.full { grid-column: 1; }
}

/* ───────────────────────────────────────────────────────
   Print styles — สำหรับพิมพ์เป็นกระดาษ (A4)
   กด Cmd+P (Mac) / Ctrl+P (Win) จากไฟล์ standalone แต่ละบท
   =================================================== */
@media print {
  /* บังคับให้สีพิมพ์ออกมาตามที่เห็น (ไม่งั้น browser ตัดสีอ่อนออก) */
  * {
    -webkit-print-color-adjust: exact !important;
    print-color-adjust: exact !important;
    color-adjust: exact !important;
  }

  @page {
    size: A4 portrait;
    margin: 10mm 8mm;
  }

  body {
    background: white !important;
    padding: 0 !important;
    max-width: none !important;
    font-size: 10pt;
    line-height: 1.4;
  }

  header {
    margin-bottom: 8pt;
    padding-bottom: 4pt;
    page-break-after: avoid;
  }
  header h1 { font-size: 14pt; }
  header span { font-size: 8pt; }

  /* การ์ดต้องไม่ถูกตัดข้ามหน้า */
  .card {
    break-inside: avoid;
    page-break-inside: avoid;
    box-shadow: none !important;
    border: 1px solid #999 !important;
    margin-bottom: 4pt;
  }

  .grid { gap: 6pt; }
  .card { padding: 8pt 10pt; }
  .card h2 {
    font-size: 8pt;
    page-break-after: avoid;
    margin-bottom: 6pt;
  }

  /* ปิด hover effects ใน print */
  .signal-table tr:hover td { background: transparent !important; }

  /* ลด font ของตาราง */
  .signal-table, .signal-table td, .signal-table th { font-size: 9pt; }
  .signal-table td { padding: 4pt 6pt; }
  .signal-table th { padding: 4pt 6pt; }

  /* Row content */
  .row { font-size: 9pt; margin-bottom: 3pt; }

  /* Tip / Warn boxes */
  .tip, .warn { font-size: 9pt; padding: 6pt 8pt; margin-top: 4pt; }

  /* ซ่อน link decoration */
  a { text-decoration: none; color: inherit; }

  /* ทุก card.full ขึ้นแถวใหม่อย่างนุ่มนวล */
  .card.full { page-break-before: auto; }
}