programming-fengshui/style.css

:root {
  --bg: #fdf6ec;
  --fg: #2b2118;
  --muted: #6b5a48;
  --accent: #b8312f;
  --gold: #c79b3c;
  --card-bg: #ffffff;
  --shadow: 0 6px 18px rgba(0, 0, 0, 0.08);

  --kim: #d4af37;
  --thuy: #2e6fb5;
  --moc: #3a8f4a;
  --hoa: #c0392b;
  --tho: #8a6d3b;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Segoe UI", "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.55;
}

.page {
  max-width: 880px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 3rem;
}

.hero {
  text-align: center;
  margin-bottom: 2rem;
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  color: var(--accent);
  letter-spacing: 0.5px;
}

.hero .subtitle {
  margin: 0.5rem 0 0;
  color: var(--muted);
  font-style: italic;
}

.figure {
  display: flex;
  justify-content: center;
  margin: 1.5rem 0 2.5rem;
}

.figure figure {
  margin: 0;
  background: var(--card-bg);
  padding: 1rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
  max-width: 100%;
}

.figure img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 8px;
}

.figure figcaption {
  text-align: center;
  margin-top: 0.75rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.elements h2,
.credit h2 {
  text-align: center;
  color: var(--accent);
  margin: 2rem 0 1rem;
}

.grid {
  display: grid;
  gap: 0.9rem;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}

.card {
  background: var(--card-bg);
  border-radius: 10px;
  padding: 1rem 1rem 1.1rem;
  box-shadow: var(--shadow);
  border-top: 4px solid var(--gold);
  transition: transform 0.15s ease;
}

.card:hover {
  transform: translateY(-2px);
}

.card h3 {
  margin: 0 0 0.4rem;
  font-size: 1.1rem;
  letter-spacing: 1px;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.card.kim { border-top-color: var(--kim); }
.card.kim h3 { color: var(--kim); }
.card.thuy { border-top-color: var(--thuy); }
.card.thuy h3 { color: var(--thuy); }
.card.moc { border-top-color: var(--moc); }
.card.moc h3 { color: var(--moc); }
.card.hoa { border-top-color: var(--hoa); }
.card.hoa h3 { color: var(--hoa); }
.card.tho { border-top-color: var(--tho); }
.card.tho h3 { color: var(--tho); }

.disclaimer {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 1rem;
}

.credit {
  margin-top: 2.5rem;
  background: var(--card-bg);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow);
}

.credit p {
  margin: 0.4rem 0;
}

.credit ul {
  margin: 0.5rem 0 0.75rem 1.25rem;
  padding: 0;
}

.credit a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px dotted var(--accent);
}

.credit a:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.credit .note {
  font-size: 0.85rem;
  color: var(--muted);
  font-style: italic;
}

/* ===== Dual-mode toggle + panels ===== */
.mode-toggle {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin: 1rem 0 1.5rem;
}

.mode-toggle [role="tab"] {
  font: inherit;
  padding: 0.45rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--muted);
  background: var(--card-bg);
  color: var(--fg);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.mode-toggle [role="tab"][aria-selected="true"] {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.mode-toggle [role="tab"]:hover {
  border-color: var(--accent);
}

.mode-toggle [role="tab"]:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

[role="tabpanel"][hidden] { display: none; }

.mode-tag {
  font-size: 0.85rem;
  font-style: italic;
  color: var(--muted);
  font-weight: normal;
  margin-left: 0.4rem;
}

.original-image {
  margin: 2rem 0 0;
  background: var(--card-bg);
  padding: 0.75rem 1rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.original-image summary {
  cursor: pointer;
  color: var(--muted);
  font-style: italic;
}

.original-image figure { margin: 0.75rem 0 0; }

.original-image img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 8px;
}

.original-image figcaption {
  text-align: center;
  margin-top: 0.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (prefers-reduced-motion: no-preference) {
  @keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
  [role="tabpanel"]:not([hidden]) { animation: fadeIn 150ms ease; }
}

/* ===== Chip grid (modern panel) ===== */
.card-count {
  display: block;
  margin: 0 0 0.6rem;
  color: var(--muted);
  font-size: 0.8rem;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.chip {
  display: inline-block;
  padding: 0.18rem 0.55rem;
  border-radius: 999px;
  font-size: 0.78rem;
  line-height: 1.4;
  border: 1px solid rgba(0, 0, 0, 0.08);
  white-space: nowrap;
  background: var(--bg);
  color: var(--fg);
}

.legend {
  text-align: center;
  font-style: italic;
  color: var(--muted);
  font-size: 0.85rem;
  margin: 1rem 0 0;
}

.render-error {
  text-align: center;
  color: var(--accent);
  padding: 1rem;
  border: 1px dashed var(--accent);
  border-radius: 8px;
}

#debug-panel {
  margin-top: 1rem;
  background: var(--card-bg);
  padding: 0.75rem 1rem;
  border-radius: 8px;
  box-shadow: var(--shadow);
  font-size: 0.9rem;
}

#debug-panel summary {
  cursor: pointer;
  color: var(--muted);
}

#debug-panel h4 {
  margin: 0.75rem 0 0.4rem;
  font-size: 0.9rem;
  color: var(--fg);
}

@media (max-width: 500px) {
  .chip { font-size: 0.72rem; padding: 0.15rem 0.45rem; }
  .grid { grid-template-columns: 1fr; }
  .mode-toggle [role="tab"] { padding: 0.35rem 0.75rem; font-size: 0.9rem; }
}