/* VocabFun — editorial type system */

:root {
  --paper: #F2EBDD;
  --paper-2: #EFE7D5;
  --card: #FBF6E9;
  --ink: #1A1814;
  --ink-2: #4A463E;
  --ink-3: #7A7468;
  --rule: #D8CFB9;
  --rule-2: #C6BCA1;
  --accent: #B8472A;     /* terracotta */
  --accent-deep: #8C2F18;
  --sage: #6B7F5C;
  --sage-deep: #4F5F44;
  --gold: #C49A2A;

  --serif: 'Newsreader', 'Iowan Old Style', Georgia, serif;
  --sans: 'Geist', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --mono: 'JetBrains Mono', 'SF Mono', Menlo, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ───────────── Top bar ───────────── */
.topbar {
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(8px);
  background: color-mix(in oklab, var(--paper) 92%, transparent);
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 32px;
  max-width: 1240px;
  margin: 0 auto;
  gap: 32px;
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--serif);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: -0.01em;
}
.brand .dot { color: var(--accent); }
.brand .sub {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
  align-self: center;
  padding-left: 10px;
  margin-left: 2px;
  border-left: 1px solid var(--rule-2);
}
.nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 14px;
  font-weight: 500;
}
.nav a {
  color: var(--ink-2);
  position: relative;
  padding: 6px 0;
  transition: color .15s ease;
}
.nav a:hover { color: var(--ink); }
.nav a.active { color: var(--ink); }
.nav a.active::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -2px;
  height: 2px; background: var(--accent);
}
.nav .cta {
  background: var(--ink);
  color: var(--paper);
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 13px;
  transition: background .15s ease;
}
.nav .cta:hover { background: var(--accent); }

/* ───────────── Buttons ───────────── */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px;
  border-radius: 999px;
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .12s ease, background .15s ease, color .15s ease, border-color .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--ink);
  color: var(--paper);
}
.btn-primary:hover { background: var(--accent); }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}
.btn-ghost:hover { background: var(--ink); color: var(--paper); }

/* ───────────── Eyebrows & rules ───────────── */
.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-3);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: '';
  width: 28px; height: 1px;
  background: var(--accent);
  display: inline-block;
}

.rule {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 0;
}

/* ───────────── Section spacing ───────────── */
section { padding: 96px 0; }
section.tight { padding: 64px 0; }

h1, h2, h3, h4 { font-family: var(--serif); font-weight: 400; letter-spacing: -0.015em; margin: 0; }
h1 { font-size: clamp(56px, 7vw, 104px); line-height: 0.96; }
h2 { font-size: clamp(36px, 4.4vw, 64px); line-height: 1.02; }
h3 { font-size: clamp(22px, 2vw, 28px); line-height: 1.15; }
h4 { font-size: 18px; line-height: 1.2; }

p { margin: 0; }

/* ───────────── Footer ───────────── */
.footer {
  border-top: 1px solid var(--rule);
  background: var(--paper-2);
  padding: 72px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.footer .col h4 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-3);
  font-weight: 500;
  margin-bottom: 18px;
}
.footer .col a {
  display: block;
  padding: 6px 0;
  color: var(--ink-2);
  font-size: 15px;
}
.footer .col a:hover { color: var(--accent); }
.footer-bottom {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
}

/* ───────────── Utilities ───────────── */
.text-mono { font-family: var(--mono); }
.text-serif { font-family: var(--serif); }
.muted { color: var(--ink-3); }
.center { text-align: center; }
.upper { text-transform: uppercase; letter-spacing: 0.18em; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding: 5px 10px;
  border: 1px solid var(--rule-2);
  border-radius: 999px;
}

@media (max-width: 880px) {
  .topbar-inner { padding: 12px 20px; }
  .nav { gap: 16px; }
  .container { padding: 0 20px; }
  section { padding: 64px 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .topbar-inner { padding: 10px 16px; gap: 12px; }
  .brand { font-size: 19px; gap: 6px; }
  .brand .sub { display: none; }
  .nav { gap: 14px; font-size: 13px; }
  .nav a[href*="word-of-day"] { display: none; }
  .nav .cta { padding: 7px 14px; font-size: 12px; }
  .container { padding: 0 18px; }
  section { padding: 56px 0; }

  h1 { font-size: clamp(40px, 12vw, 64px); }
  h2 { font-size: clamp(30px, 8vw, 48px); }

  .btn { padding: 12px 18px; font-size: 14px; }

  .footer { padding: 56px 0 28px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .footer-bottom {
    margin-top: 40px;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}