/* GiaXayDung.xyz — public site styles
   Mobile-first, no framework, no build step. */

:root {
  --color-primary: #0f5c3f;
  --color-primary-dark: #0a3f2b;
  --color-accent: #e8a33d;
  --color-bg: #f7f8f7;
  --color-surface: #ffffff;
  --color-text: #1c211e;
  --color-muted: #6b7770;
  --color-border: #e1e5e2;
  --radius: 10px;
  --max-width: 1160px;
  font-size: 16px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.55;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 16px;
}

/* ---- Header ---- */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 12px 16px;
  flex-wrap: wrap;
}
.logo { font-weight: 700; font-size: 1.25rem; color: var(--color-primary-dark); }
.main-nav { display: flex; gap: 16px; flex-wrap: wrap; font-size: 0.92rem; }
.main-nav a { color: var(--color-text); }
.header-search { margin-left: auto; display: flex; }
.header-search input {
  border: 1px solid var(--color-border);
  border-radius: var(--radius) 0 0 var(--radius);
  padding: 8px 12px;
  font-size: 0.9rem;
  width: 220px;
}
.header-search button {
  border: 1px solid var(--color-primary);
  background: var(--color-primary);
  color: #fff;
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 0 14px;
  cursor: pointer;
}

@media (max-width: 720px) {
  .main-nav { order: 3; width: 100%; overflow-x: auto; gap: 12px; }
  .header-search { width: 100%; order: 2; }
  .header-search input { flex: 1; width: auto; }
}

/* ---- Hero ---- */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  padding: 56px 0 64px;
  text-align: center;
}
.hero h1 { font-size: 1.9rem; margin-bottom: 12px; }
.hero p { opacity: 0.92; max-width: 640px; margin: 0 auto 24px; }
.hero-search { display: flex; max-width: 520px; margin: 0 auto; }
.hero-search input {
  flex: 1;
  padding: 14px 16px;
  border: none;
  border-radius: var(--radius) 0 0 var(--radius);
  font-size: 1rem;
}
.hero-search button {
  padding: 0 22px;
  border: none;
  background: var(--color-accent);
  color: #2a1c00;
  font-weight: 600;
  border-radius: 0 var(--radius) var(--radius) 0;
  cursor: pointer;
}

/* ---- Sections ---- */
.section { padding: 40px 16px; }
.section h2 { font-size: 1.4rem; margin-bottom: 18px; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.card {
  display: block;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px;
  color: var(--color-text);
}
.card h3 { margin: 0 0 8px; font-size: 1.05rem; color: var(--color-primary-dark); }
.card p { margin: 0; font-size: 0.9rem; color: var(--color-muted); }

.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}
.data-table th, .data-table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.92rem;
}
.data-table th { background: #f0f2f0; color: var(--color-muted); font-weight: 600; }

.tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 0.85rem;
  color: var(--color-text);
}

.empty-state {
  color: var(--color-muted);
  background: var(--color-surface);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
}

/* ---- Footer ---- */
.site-footer {
  background: var(--color-primary-dark);
  color: #dfe8e3;
  padding: 32px 0;
  margin-top: 40px;
  font-size: 0.85rem;
}
.site-footer a { color: #fff; }
.footer-links { margin: 10px 0; }
.disclaimer { opacity: 0.75; font-size: 0.8rem; }