/* ============================================================
   Drift Website — shared styles
   Design language:
     paper background, deep ink type,
     mint accent used sparingly, soft purple as a tertiary,
     calm horizontal rhythm, thin wave motifs.
   ============================================================ */

:root {
  /* Surfaces */
  --paper: #f5f2ea;          /* off-white, slightly warm */
  --paper-2: #ece8dc;        /* card / inset */
  --paper-3: #e3dfd2;        /* divider tint */
  --paper-cream: #faf7f0;    /* lightest */

  /* Ink */
  --ink: #0f1626;            /* deep navy near-black */
  --ink-2: #1c2438;          /* secondary ink */
  --ink-muted: #5a6478;      /* body muted */
  --ink-faint: #8a92a3;      /* metadata */
  --ink-ultra-faint: #b9bdc7;

  /* Accent — used sparingly */
  --mint: #2fa37a;           /* darker mint, AA on paper */
  --mint-soft: #5fcfa3;      /* original mint, for fills/highlights */
  --mint-tint: #d9efe5;      /* fill tint */

  /* Tertiary — Drift purple, mostly in chart/illustration */
  --purple: #6b5fc4;
  --purple-soft: #8b7fd6;
  --purple-tint: #e2dff2;

  /* Misc */
  --danger: #c43d3d;
  --amber: #b8821b;

  /* Borders */
  --line: #d8d3c5;
  --line-faint: #e3ddcd;

  /* Type */
  --serif: 'Instrument Serif', 'EB Garamond', Georgia, serif;
  --sans: 'DM Sans', system-ui, -apple-system, 'Helvetica Neue', sans-serif;
  --mono: 'DM Mono', 'JetBrains Mono', ui-monospace, Menlo, monospace;

  /* Spacing scale */
  --container: 1180px;
  --container-narrow: 880px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

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

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

::selection { background: var(--mint-tint); color: var(--ink); }

/* ---------- Layout primitives ---------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}
.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 32px;
}

/* ---------- Top nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--paper) 88%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line-faint);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--serif);
  font-size: 24px;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.brand-icon { width: 28px; height: 28px; border-radius: 7px; display: block; flex-shrink: 0; }
.brand-italic { font-style: italic; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-links a {
  font-size: 14px;
  color: var(--ink-muted);
  transition: color .15s;
}
.nav-links a:hover { color: var(--ink); }
.nav-links a.active { color: var(--ink); }

.nav-actions { display: flex; align-items: center; gap: 12px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.005em;
  cursor: pointer;
  transition: transform .12s ease, background .15s ease, border-color .15s ease, color .15s ease;
  text-decoration: none;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--ink);
  color: var(--paper-cream);
}
.btn-primary:hover { background: var(--ink-2); }

.btn-mint {
  background: var(--mint);
  color: #fff;
}
.btn-mint:hover { background: #258562; }

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn-ghost:hover { border-color: var(--ink); }

.btn-text {
  background: transparent;
  color: var(--ink-muted);
  padding: 8px 12px;
}
.btn-text:hover { color: var(--ink); }

.btn-sm { padding: 8px 14px; font-size: 13px; }
.btn-lg { padding: 14px 26px; font-size: 15px; }

/* ---------- Type ---------- */
.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.eyebrow .dot {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--mint);
  vertical-align: middle;
  margin-right: 8px;
  margin-bottom: 2px;
}

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.015em;
  line-height: 1.05;
  color: var(--ink);
}

.display {
  font-family: var(--serif);
  font-size: clamp(44px, 5.6vw, 80px);
  line-height: 0.98;
  letter-spacing: -0.025em;
}
.display em {
  font-style: italic;
  color: var(--ink);
}

h2 { font-size: clamp(32px, 4vw, 48px); }
h3 { font-size: 24px; }

.lede {
  font-size: 19px;
  line-height: 1.5;
  color: var(--ink-muted);
  max-width: 56ch;
  text-wrap: pretty;
}

.mono { font-family: var(--mono); }
.serif { font-family: var(--serif); }
.italic { font-style: italic; }

/* ---------- Section ---------- */
.section { padding: 96px 0; }
.section-sm { padding: 64px 0; }
.section-tight { padding: 48px 0; }

.section-divider {
  height: 1px;
  background: var(--line-faint);
  width: 100%;
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--line-faint);
  padding: 56px 0 40px;
  margin-top: 64px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: end;
}
.footer-cols {
  display: flex;
  gap: 56px;
  flex-wrap: wrap;
}
.footer-col h4 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 16px;
  font-weight: 500;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-col a { font-size: 14px; color: var(--ink-muted); }
.footer-col a:hover { color: var(--ink); }
.footer-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--ink-faint);
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--line-faint);
  font-family: var(--mono);
}

/* ---------- Card ---------- */
.card {
  background: var(--paper-cream);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px;
}

/* ---------- Wave background motif ---------- */
.wave-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}
.wave-bg svg {
  position: absolute;
  width: 100%;
  height: 100%;
}

/* ---------- Tag / pill ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--ink-muted);
}
.tag.mint { background: var(--mint-tint); border-color: transparent; color: var(--mint); }
.tag.purple { background: var(--purple-tint); border-color: transparent; color: var(--purple); }

/* ---------- Reusable focus ring ---------- */
:where(button, a, input, select, textarea):focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 2px;
  border-radius: 6px;
}

/* ---------- Utility ---------- */
.flex { display: flex; }
.col { flex-direction: column; }
.center { align-items: center; justify-content: center; }
.between { justify-content: space-between; }
.gap-8 { gap: 8px; } .gap-12 { gap: 12px; } .gap-16 { gap: 16px; } .gap-24 { gap: 24px; } .gap-32 { gap: 32px; }
.muted { color: var(--ink-muted); }
.faint { color: var(--ink-faint); }
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; } .mt-16 { margin-top: 16px; } .mt-24 { margin-top: 24px; } .mt-32 { margin-top: 32px; } .mt-48 { margin-top: 48px; } .mt-64 { margin-top: 64px; }

/* ---------- Responsive ---------- */
@media (max-width: 760px) {
  .nav-links { display: none; }
  .section { padding: 64px 0; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
}