:root {
  --desk: #c5ccc4;
  --ink: #171e1b;
  --slip: #f0f3ec;
  --stamp: #a83228;
  --sideline: #3a6750;
  --muted: #5a6560;
  --rule: #8a938c;
  --paper: #e7ebe4;
  --focus: #1b2320;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--desk);
  color: var(--ink);
  font-family: "Be Vietnam Pro", "Noto Sans", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  font-weight: 400;
}

a { color: var(--sideline); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--stamp); }
a:focus-visible { outline: 2px solid var(--stamp); outline-offset: 3px; }

.stamp-bar {
  background: var(--stamp);
  color: #f3ece6;
  font-family: "Archivo Narrow", "Be Vietnam Pro", sans-serif;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 8px 20px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px;
}

header.site {
  padding: 28px 0 18px;
  border-bottom: 1px solid var(--rule);
}

.brand {
  font-family: "Archivo Narrow", sans-serif;
  font-weight: 700;
  font-size: 32px;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--ink);
  text-decoration: none;
}
.brand:hover { color: var(--ink); }
.tag {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 14px;
}

nav.site {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 16px;
  font-size: 14px;
}
nav.site a { color: var(--ink); text-decoration: none; }
nav.site a:hover { color: var(--stamp); }

main { padding: 32px 0 64px; }

h1, h2, h3 {
  font-family: "Archivo Narrow", sans-serif;
  letter-spacing: -0.02em;
  line-height: 1.15;
  font-weight: 700;
}
h1 { font-size: clamp(32px, 5vw, 48px); margin: 0 0 16px; }
h2 { font-size: 28px; margin: 40px 0 12px; }
h3 { font-size: 20px; margin: 28px 0 8px; }

.lede {
  font-size: 18px;
  max-width: 40rem;
  margin: 0 0 28px;
}

.phiếu {
  background: var(--slip);
  border: 1px solid var(--rule);
  display: grid;
  grid-template-columns: 12px 1fr;
  margin: 24px 0 32px;
}
.phiếu::before {
  content: "";
  background: repeating-linear-gradient(
    to bottom,
    transparent 0 10px,
    var(--desk) 10px 14px
  );
  border-right: 1px dashed var(--rule);
}
.phiếu-body { padding: 20px 22px 22px; }
.phiếu h2 { margin-top: 0; font-size: 22px; }

table.keo {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 13px;
  background: var(--slip);
}
table.keo th {
  text-align: left;
  font-family: "Archivo Narrow", sans-serif;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 2px solid var(--sideline);
  padding: 8px 10px;
  font-weight: 600;
}
table.keo td {
  padding: 10px;
  border-bottom: 1px solid var(--paper);
}
table.keo tr:last-child td { border-bottom: 0; }
.live {
  color: var(--stamp);
  font-family: "Archivo Narrow", sans-serif;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
@media (max-width: 720px) {
  .grid-2 { grid-template-columns: 1fr; }
}

article.card {
  background: var(--slip);
  padding: 18px 20px;
  border: 1px solid var(--rule);
}
article.card h3 { margin: 0 0 8px; }
article.card p { margin: 0; color: var(--muted); font-size: 14px; }

.note {
  font-size: 13px;
  color: var(--muted);
  border-left: 3px solid var(--sideline);
  padding-left: 12px;
  margin: 24px 0;
}

footer.site {
  border-top: 1px solid var(--rule);
  padding: 28px 0 40px;
  font-size: 13px;
  color: var(--muted);
}
footer.site strong { color: var(--ink); font-weight: 600; }

.prose { max-width: 42rem; }
.prose p { margin: 0 0 1em; }
.prose ul { padding-left: 1.2em; }

.crumb { font-size: 13px; color: var(--muted); margin-bottom: 18px; }
.crumb a { color: var(--muted); }