:root {
  --ink: #1c1917;
  --muted: #78716c;
  --bg: #fff7f2;
  --paper: #ffffff;
  --line: #e7e5e4;
  --brand: #f15a29;
  --brand-dark: #c2410c;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Segoe UI", "Noto Sans Thai", Tahoma, sans-serif;
  line-height: 1.55;
}

a {
  color: var(--brand-dark);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 18px 8vw;
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}

.nav nav {
  display: flex;
  gap: 18px;
}

.nav nav a {
  text-decoration: none;
  font-weight: 700;
  color: var(--ink);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
}

.brand small {
  display: block;
  color: var(--muted);
  font-weight: 600;
}

.mark {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: var(--brand);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 900;
}

main {
  padding: 48px 8vw 72px;
  max-width: 980px;
  margin: 0 auto;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.15;
  margin: 8px 0 16px;
}

.hero.compact h1 {
  font-size: 2.2rem;
}

.kicker {
  color: var(--brand-dark);
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.85rem;
}

.lead {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 40rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.btn {
  display: inline-block;
  text-decoration: none;
  border-radius: 14px;
  padding: 12px 18px;
  font-weight: 800;
}

.btn.primary {
  background: var(--brand);
  color: #fff;
}

.btn.ghost {
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--line);
}

.panel,
.grid3 article {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 24px;
  margin: 28px 0;
}

.panel.mute {
  background: #fff1eb;
}

.grid3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 28px 0;
}

.grid3 article {
  margin: 0;
}

.points,
ol {
  padding-left: 1.2rem;
}

.note,
code {
  font-size: 0.95rem;
}

code {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 2px 6px;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 20px;
}

th,
td {
  text-align: left;
  border-bottom: 1px solid var(--line);
  padding: 10px 8px;
  vertical-align: top;
}

footer {
  padding: 28px 8vw 48px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (max-width: 720px) {
  .grid3 {
    grid-template-columns: 1fr;
  }

  .nav nav {
    display: none;
  }
}