:root {
  --green-dark: #14532d;
  --green: #1f8a5b;
  --green-soft: #e8f5ee;
  --cocoa: #6f4e37;
  --coffee: #9c6b30;
  --text: #1a2e22;
  --muted: #5f7168;
  --line: #dce8e1;
  --bg: #ffffff;
  --card: #ffffff;
  --radius: 18px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 16px 48px;
}

/* ---------- header ---------- */
.site-head {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
}
.site-head .wrap {
  padding-top: 14px;
  padding-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  border: 2px solid var(--green);
  display: grid;
  place-items: center;
  font-size: 22px;
  flex: 0 0 auto;
}
.brand h1 {
  margin: 0;
  font-size: 20px;
  letter-spacing: -0.02em;
  color: var(--green-dark);
}
.brand p {
  margin: 0;
  font-size: 12px;
  color: var(--muted);
}

/* ---------- hero ---------- */
.hero {
  padding: 26px 0 6px;
}
.hero .kicker {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 800;
  color: var(--green);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.hero .kicker::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
}
.hero h2 {
  margin: 8px 0;
  font-size: 26px;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--text);
}
.hero p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

/* ---------- filter chips ---------- */
.chips {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 16px 0 4px;
  scrollbar-width: none;
}
.chips::-webkit-scrollbar { display: none; }
.chip {
  flex: 0 0 auto;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--text);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}
.chip.active {
  border-color: var(--green);
  color: var(--green-dark);
}

/* ---------- cards ---------- */
.cards {
  display: grid;
  gap: 14px;
  padding-top: 12px;
}
.card {
  display: block;
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  background: var(--card);
}
.card:active { border-color: var(--green); }
.card .meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 6px;
}
.dot { width: 8px; height: 8px; border-radius: 50%; flex: 0 0 auto; }
.dot.cacao { background: var(--cocoa); }
.dot.ca-phe { background: var(--coffee); }
.dot.chinh-sach { background: var(--green); }
.dot.ky-thuat { background: var(--green); }
.dot.cong-dong { background: var(--cocoa); }
.card h3 {
  margin: 0 0 6px;
  font-size: 17px;
  line-height: 1.4;
  letter-spacing: -0.01em;
}
.card p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}
.card .more {
  display: inline-block;
  margin-top: 10px;
  font-size: 13px;
  font-weight: 800;
  color: var(--green);
}
.empty {
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  padding: 28px 16px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}

/* ---------- article ---------- */
.article { padding-top: 22px; }
.article .back {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: var(--green);
  text-decoration: none;
  margin-bottom: 12px;
}
.article h1 {
  margin: 0 0 8px;
  font-size: 24px;
  line-height: 1.35;
  letter-spacing: -0.02em;
}
.article .meta {
  font-size: 12px;
  color: var(--muted);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 6px;
}
.article .lede {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
}
.article p { margin: 14px 0; }
.article h2 {
  font-size: 18px;
  margin: 26px 0 4px;
  color: var(--green-dark);
}
.article ul { padding-left: 20px; }
.article li { margin: 8px 0; }
.article .tag {
  display: inline-block;
  border: 1px solid var(--green);
  color: var(--green-dark);
  border-radius: 999px;
  padding: 3px 12px;
  font-size: 12px;
  font-weight: 800;
  margin-right: 6px;
}

/* ---------- footer ---------- */
footer {
  border-top: 1px solid var(--line);
  margin-top: 36px;
  padding: 20px 0 8px;
  font-size: 12px;
  color: var(--muted);
}
footer strong { color: var(--green-dark); }

@media (min-width: 560px) {
  .hero h2 { font-size: 32px; }
  .card h3 { font-size: 19px; }
}