/* ════════════════════════════════════════════════════════════
   tools/thai-number/style.css — Number → Thai Text Converter
   UI character: RECEIPT-STYLE — 1 input → 4 outputs with copy
   Theme: dark navy + ink (formal/banking feel)
   ════════════════════════════════════════════════════════════ */

body.tool-thai-number {
  --page-bg:    #F2F2F4;
  --card-bg:    #FFFFFF;
  --card-soft:  #F7F7F8;
  --ink:        #0A0A0A;
  --text:       #1F2937;
  --muted:      #6B7280;
  --hairline:   #EAEAEC;

  --acc:        #10B981;
  --acc-soft:   #D8EFE0;
  --acc-text:   #047857;

  --navy:       #1E293B;
  --navy-light: #334155;

  --r-card:     24px;
  --r-pill:     999px;
  --r-input:    14px;
  --shadow-soft: 0 1px 2px rgba(0,0,0,.04), 0 8px 24px -16px rgba(0,0,0,.06);

  background: var(--page-bg);
  color: var(--text);
}

body.tool-thai-number main.container,
body.tool-thai-number .site-header-inner {
  max-width: 1180px;
  padding-inline: clamp(16px, 3vw, 28px);
}

body.tool-thai-number .back-link {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--muted); font-size: 13.5px;
  text-decoration: none; margin: 20px 0 16px; font-weight: 500;
}
body.tool-thai-number .back-link:hover { color: var(--ink); }

/* hero */
.tn-hero { padding: clamp(16px, 3vw, 28px) 4px clamp(16px, 3vw, 24px); max-width: 760px; }
.tn-eyebrow {
  font-size: 11px; letter-spacing: .14em; font-weight: 600;
  color: var(--muted); text-transform: uppercase; margin: 0 0 14px;
}
.tn-h1 {
  font-size: clamp(28px, 4.5vw, 44px);
  line-height: 1.12; font-weight: 700; letter-spacing: -.02em;
  color: var(--ink); margin: 0 0 14px;
}
.tn-h1-accent { color: var(--muted); font-weight: 600; }
.tn-sub { font-size: 15px; color: var(--muted); margin: 0; line-height: 1.55; max-width: 640px; }

/* ─── BIG INPUT (sticky-feel banner) ────────────────────── */
.tn-input-card {
  background: var(--ink);
  border-radius: var(--r-card);
  padding: clamp(24px, 4vw, 40px) clamp(24px, 4vw, 48px);
  margin-bottom: 16px;
  box-shadow: var(--shadow-soft);
}
.tn-input-label {
  font-size: 11px; letter-spacing: .14em; text-transform: uppercase;
  font-weight: 700; color: rgba(255,255,255,.6); margin: 0 0 12px;
}
.tn-big-input {
  width: 100%;
  background: transparent; border: 0;
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 700; color: #fff;
  letter-spacing: -.02em; line-height: 1;
  outline: none;
  font-variant-numeric: tabular-nums;
  padding: 0;
}
.tn-big-input::placeholder { color: rgba(255,255,255,.25); }
.tn-input-hint {
  font-size: 16px; color: rgba(255,255,255,.55);
  margin: 14px 0 0;
}

/* ─── RECEIPT PANEL (4 output rows) ──────────────────────── */
.tn-receipt {
  background: var(--card-bg);
  border-radius: var(--r-card);
  padding: clamp(16px, 2.5vw, 24px);
  margin-bottom: 20px;
  box-shadow: var(--shadow-soft);
}
.tn-receipt-head {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 8px 16px;
  border-bottom: 1px dashed var(--hairline);
  margin-bottom: 8px;
}
.tn-receipt-title {
  font-size: 16px; font-weight: 700; color: var(--ink); margin: 0;
  letter-spacing: -.005em;
}
.tn-receipt-meta {
  font-size: 11px; color: var(--muted); font-weight: 500;
  letter-spacing: .04em; text-transform: uppercase;
}

.tn-output {
  padding: 22px 12px;
  border-bottom: 1px dashed var(--hairline);
  display: grid;
  grid-template-columns: 36px 1fr auto;
  gap: 14px;
  align-items: center;
}
.tn-output:last-child { border-bottom: 0; }

.tn-output-num {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--card-soft);
  color: var(--muted);
  font-weight: 700; font-size: 12px;
  display: grid; place-items: center;
}

.tn-output-body { min-width: 0; }
.tn-output-mode {
  font-size: 13px; font-weight: 700; color: var(--muted);
  margin: 0 0 8px;
  display: flex; align-items: center; gap: 8px;
  letter-spacing: .02em;
  text-transform: uppercase;
}
.tn-output-mode-tag {
  font-size: 10.5px; font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--r-pill);
  letter-spacing: .06em;
  text-transform: uppercase;
}
.tn-tag-formal { background: var(--acc-soft); color: var(--acc-text); }
.tn-tag-casual { background: #DDEBFA; color: #1E5F94; }
.tn-tag-ordinal { background: #EBDEFB; color: #6B3FA8; }
.tn-tag-thainum { background: #FFEDD5; color: #C2410C; }

.tn-output-text {
  font-size: clamp(20px, 2.5vw, 26px);
  line-height: 1.45;
  color: var(--ink);
  font-weight: 600;
  margin: 0;
  word-break: break-word;
  letter-spacing: -.005em;
}
.tn-output-text-thainum {
  font-size: clamp(28px, 3.5vw, 36px);
  font-weight: 700;
  letter-spacing: .02em;
  font-variant-numeric: tabular-nums;
}

.tn-copy {
  background: var(--card-soft);
  border: 1px solid var(--hairline);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 13px; font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background .15s, color .15s, border-color .15s;
  white-space: nowrap;
}
.tn-copy:hover { background: var(--ink); color: #fff; border-color: var(--ink); }
.tn-copy.is-copied { background: var(--acc); color: #fff; border-color: var(--acc); }

/* receipt footer = breakdown by place */
.tn-receipt-footer {
  padding: 16px 12px 8px;
  border-top: 1px dashed var(--hairline);
  margin-top: 8px;
}
.tn-receipt-footer-title {
  font-size: 11px; letter-spacing: .12em; text-transform: uppercase;
  font-weight: 700; color: var(--muted); margin: 0 0 10px;
}
.tn-place-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 8px;
}
.tn-place {
  padding: 10px 12px;
  background: var(--card-soft);
  border-radius: 10px;
  text-align: center;
}
.tn-place-label {
  font-size: 11px; color: var(--muted);
  margin-bottom: 4px;
}
.tn-place-value {
  font-size: 18px; font-weight: 700; color: var(--ink);
  font-variant-numeric: tabular-nums;
}

/* ─── PANEL ───────────────────────────────────────────────── */
.tn-panel {
  background: var(--card-bg);
  border-radius: var(--r-card);
  padding: clamp(20px, 3vw, 36px);
  margin-bottom: 20px;
  box-shadow: var(--shadow-soft);
}
.tn-panel-head {
  display: flex; align-items: baseline; justify-content: space-between;
  margin-bottom: 22px; padding: 0 2px; gap: 14px; flex-wrap: wrap;
}
.tn-panel-title {
  font-size: clamp(17px, 2vw, 22px);
  font-weight: 700; color: var(--ink); margin: 0; letter-spacing: -.01em;
}
.tn-panel-sub { font-size: 12.5px; color: var(--muted); margin: 0; }

/* rules grid (3 cards: เอ็ด/ยี่/สิบ) */
.tn-rules-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px;
}
@media (max-width: 720px) { .tn-rules-grid { grid-template-columns: 1fr; } }
.tn-rule {
  padding: 22px 24px;
  border-radius: 16px;
  background: var(--card-soft);
  border: 1px solid var(--hairline);
}
.tn-rule-key {
  display: inline-block;
  font-size: 24px; font-weight: 800; color: var(--ink);
  background: var(--acc-soft);
  padding: 4px 16px; border-radius: var(--r-pill);
  margin-bottom: 12px;
}
.tn-rule-title {
  font-size: 15px; font-weight: 700; color: var(--ink); margin: 0 0 6px;
}
.tn-rule-desc {
  font-size: 13px; line-height: 1.55; color: var(--text); margin: 0 0 10px;
}
.tn-rule-example {
  padding: 10px 14px;
  background: var(--card-bg);
  border-radius: 10px;
  font-size: 13px;
  border: 1px dashed var(--hairline);
}
.tn-rule-example strong { color: var(--acc-text); font-weight: 700; }

/* accordion */
.tn-acc { display: flex; flex-direction: column; gap: 8px; }
.tn-acc details {
  background: var(--card-soft);
  border: 1px solid var(--hairline);
  border-radius: 14px; overflow: hidden;
}
.tn-acc details[open] { background: var(--card-bg); border-color: var(--ink); }
.tn-acc summary {
  padding: 14px 18px; cursor: pointer; list-style: none;
  display: flex; justify-content: space-between; align-items: center;
  gap: 12px; font-size: 14px; font-weight: 600; color: var(--ink);
}
.tn-acc summary::-webkit-details-marker { display: none; }
.tn-acc summary::after { content: '+'; color: var(--muted); font-size: 18px; font-weight: 400; }
.tn-acc details[open] summary::after { content: '−'; }
.tn-acc-body {
  padding: 4px 18px 18px;
  font-size: 13.5px; line-height: 1.65; color: var(--text);
}
.tn-acc-body p { margin: 0 0 10px; }
.tn-acc-body p:last-child { margin: 0; }
.tn-acc-body ul { margin: 6px 0 10px 22px; padding: 0; }
.tn-acc-body strong { color: var(--ink); }

/* faq + related */
.tn-faq-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 28px; }
@media (max-width: 820px) { .tn-faq-grid { grid-template-columns: 1fr; } }
.tn-related-title {
  font-size: 11px; letter-spacing: .12em; text-transform: uppercase;
  font-weight: 600; color: var(--muted); margin: 0 0 14px;
}
.tn-related-list { list-style: none; padding: 0; margin: 0; }
.tn-related-list li {
  padding: 12px 0; border-top: 1px solid var(--hairline);
  font-size: 13px; line-height: 1.5; color: var(--muted);
}
.tn-related-list li:first-child { border-top: 0; padding-top: 4px; }
.tn-related-list a { color: var(--ink); font-weight: 600; text-decoration: none; }
.tn-related-list a:hover { color: var(--acc-text); }