/* Nhà Tiện Ích — shared stylesheet */
:root {
  --bg: #faf6ef;
  --surface: #fffdf8;
  --text: #2b2620;
  --muted: #6f6558;
  --accent: #c0562f;
  --accent-dark: #9c4526;
  --amber: #e8a33d;
  --border: #e8ddcb;
  --radius: 14px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.75;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; }

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.header-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.brand {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
}
.brand span { color: var(--accent); }
.main-nav { display: flex; gap: 4px; flex-wrap: wrap; }
.main-nav a {
  color: var(--text);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 8px 12px;
  border-radius: 999px;
}
.main-nav a:hover { background: #f3e8d8; text-decoration: none; }

.container { max-width: 760px; margin: 0 auto; padding: 0 20px; }
.container-wide { max-width: 960px; margin: 0 auto; padding: 0 20px; }

.hero {
  text-align: center;
  padding: 56px 20px 44px;
  background: linear-gradient(180deg, #fdf3e3 0%, var(--bg) 100%);
}
.hero h1 { font-size: 2.4rem; line-height: 1.2; margin: 0 0 12px; letter-spacing: -0.02em; }
.hero h1 span { color: var(--accent); }
.hero p { color: var(--muted); font-size: 1.1rem; max-width: 620px; margin: 0 auto 24px; }
.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  padding: 12px 24px;
  border-radius: 999px;
}
.btn:hover { background: var(--accent-dark); text-decoration: none; }
.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
}
.btn-outline:hover { background: #fbeee6; }

section { padding: 36px 0 8px; }
section h2 { font-size: 1.6rem; margin: 0 0 8px; letter-spacing: -0.01em; }
.section-sub { color: var(--muted); margin: 0 0 24px; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.card h3 { margin: 0; font-size: 1.15rem; line-height: 1.4; }
.card h3 a { color: var(--text); }
.card h3 a:hover { color: var(--accent); }
.card p { margin: 0; color: var(--muted); font-size: 0.97rem; }
.card .tag {
  align-self: flex-start;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-dark);
  background: #fbeee6;
  padding: 3px 10px;
  border-radius: 999px;
}
.card .read-more { font-weight: 700; margin-top: auto; padding-top: 8px; }

.deal-list { display: grid; gap: 14px; }
.deal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.deal h3 { margin: 0 0 4px; font-size: 1.1rem; }
.deal p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.deal .btn { flex-shrink: 0; padding: 10px 18px; font-size: 0.95rem; }

.category-chips { display: flex; gap: 10px; flex-wrap: wrap; }
.chip {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 9px 18px;
  color: var(--text);
  font-weight: 600;
  font-size: 0.95rem;
}
.chip:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

.telegram-box {
  background: #2b2620;
  color: #fdf8ef;
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
}
.telegram-box h2 { color: #fff; }
.telegram-box p { color: #d8cfc0; }
.telegram-box .coming { color: var(--amber); font-weight: 700; }

/* Article */
.article { padding: 36px 0 16px; }
.article h1 { font-size: 2rem; line-height: 1.3; margin: 0 0 8px; letter-spacing: -0.01em; }
.article .meta { color: var(--muted); font-size: 0.95rem; margin: 0 0 20px; }
.disclosure {
  background: #fdf3e3;
  border-left: 4px solid var(--amber);
  padding: 14px 18px;
  border-radius: 0 10px 10px 0;
  font-size: 0.97rem;
  margin: 0 0 28px;
}
.article h2 { font-size: 1.45rem; margin: 36px 0 10px; }
.article h3 { font-size: 1.15rem; margin: 26px 0 8px; }
.article p { margin: 0 0 16px; }
.article ul, .article ol { margin: 0 0 18px; padding-left: 24px; }
.article li { margin-bottom: 8px; }
.article table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 24px;
  font-size: 0.95rem;
  display: block;
  overflow-x: auto;
}
.article th, .article td {
  border: 1px solid var(--border);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}
.article th { background: #f3e8d8; font-weight: 700; }
.callout {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin: 20px 0 24px;
}
.callout strong { color: var(--accent-dark); }
.buy-box {
  background: #fbeee6;
  border: 1px solid #f0c9a8;
  border-radius: var(--radius);
  padding: 20px 22px;
  margin: 24px 0;
}
.buy-box h3 { margin-top: 0; }
.price-note { color: var(--muted); font-size: 0.92rem; }
.related {
  border-top: 1px solid var(--border);
  margin-top: 40px;
  padding-top: 24px;
}
.related h2 { font-size: 1.25rem; }

.site-footer {
  margin-top: 48px;
  background: #2b2620;
  color: #d8cfc0;
  padding: 36px 0;
  font-size: 0.95rem;
}
.site-footer a { color: #f2c98f; }
.footer-inner { max-width: 960px; margin: 0 auto; padding: 0 20px; }
.site-footer nav { display: flex; gap: 20px; flex-wrap: wrap; margin-bottom: 16px; }
.site-footer nav a { font-weight: 600; }

@media (max-width: 640px) {
  body { font-size: 16px; }
  .hero h1 { font-size: 1.9rem; }
  .article h1 { font-size: 1.6rem; }
  .header-inner { padding: 12px 16px; }
  .deal { flex-direction: column; align-items: flex-start; }
}