:root {
  --bg: #f7f4ef;
  --surface: #ffffff;
  --surface-soft: #f0ece4;
  --ink: #1c1917;
  --ink-soft: #57534e;
  --ink-faint: #78716c;
  --line: #e2ddd5;
  --indigo: #4f46e5;
  --indigo-soft: #eef2ff;
  --teal: #0f766e;
  --teal-soft: #ccfbf1;
  --amber: #b45309;
  --amber-soft: #fef3c7;
  --rose: #be185d;
  --rose-soft: #fce7f3;
  --green: #15803d;
  --green-soft: #dcfce7;
  --radius: 16px;
  --shadow: 0 14px 36px rgba(28, 25, 23, .08);
}

[data-theme="dark"] {
  --bg: #1c1917;
  --surface: #292524;
  --surface-soft: #231f1c;
  --ink: #fafaf9;
  --ink-soft: #d6d3d1;
  --ink-faint: #a8a29e;
  --line: #44403c;
  --indigo: #a5b4fc;
  --indigo-soft: rgba(99, 102, 241, .16);
  --teal: #5eead4;
  --teal-soft: rgba(20, 184, 166, .15);
  --amber: #fbbf24;
  --amber-soft: rgba(245, 158, 11, .14);
  --rose: #f9a8d4;
  --rose-soft: rgba(219, 39, 119, .14);
  --green: #86efac;
  --green-soft: rgba(34, 197, 94, .14);
  --shadow: 0 14px 36px rgba(0, 0, 0, .28);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}
a { color: var(--indigo); }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--indigo); outline-offset: 3px; }

.skip-link {
  position: fixed;
  left: 1rem;
  top: -5rem;
  z-index: 100;
  padding: .65rem 1rem;
  border-radius: 8px;
  background: var(--ink);
  color: var(--bg);
  font-weight: 700;
}
.skip-link:focus { top: 1rem; }

.site-header {
  height: 68px;
  display: flex;
  align-items: center;
  gap: .8rem;
  padding: 0 max(1.25rem, calc((100% - 1120px) / 2));
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 20;
}
.site-header a { text-decoration: none; }
.brand { display: inline-flex; align-items: center; gap: .65rem; color: var(--ink); font-weight: 800; }
.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--ink);
  color: var(--bg);
}
.header-divider { color: var(--ink-faint); }
.header-title { color: var(--ink-soft); font-size: .88rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.header-spacer { flex: 1; }
#theme-toggle {
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  border-radius: 9px;
  cursor: pointer;
}

.hero {
  padding: 5.5rem 1.25rem 4.5rem;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(circle at 15% 20%, var(--teal-soft), transparent 34%),
    radial-gradient(circle at 85% 15%, var(--indigo-soft), transparent 32%);
}
.hero-inner, .container { width: min(1120px, 100%); margin: 0 auto; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .32rem .7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink-soft);
  font-size: .76rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}
h1, h2, h3 { line-height: 1.18; }
h1 {
  max-width: 850px;
  margin: 1.25rem 0 1rem;
  font-family: Lora, Georgia, serif;
  font-size: clamp(2.45rem, 7vw, 5rem);
  letter-spacing: -.04em;
}
.hero p { max-width: 760px; margin: 0; color: var(--ink-soft); font-size: clamp(1.05rem, 2vw, 1.25rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: .7rem; margin-top: 1.7rem; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  min-height: 42px;
  padding: .65rem 1rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  color: var(--ink);
  text-decoration: none;
  font-weight: 750;
}
.button.primary { border-color: var(--indigo); background: var(--indigo); color: var(--bg); }
[data-theme="dark"] .button.primary { color: #1c1917; }

.container { padding: 4.5rem 1.25rem; }
.section { margin-bottom: 4.5rem; }
.section:last-child { margin-bottom: 0; }
.section-heading { max-width: 760px; margin-bottom: 1.6rem; }
.section-kicker { color: var(--indigo); font-weight: 850; font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; }
h2 { margin: .3rem 0 .7rem; font-family: Lora, Georgia, serif; font-size: clamp(1.8rem, 4vw, 2.7rem); letter-spacing: -.025em; }
h3 { margin: 0 0 .5rem; font-size: 1.06rem; }
.section-heading p, .muted { color: var(--ink-soft); }

.grid { display: grid; gap: 1rem; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card {
  padding: 1.35rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 1px 0 rgba(28, 25, 23, .02);
}
.card p:last-child, .card ul:last-child { margin-bottom: 0; }
.card-icon { font-size: 1.45rem; margin-bottom: .65rem; }
.number-card { display: grid; grid-template-columns: 46px 1fr; gap: 1rem; }
.number {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: var(--indigo-soft);
  color: var(--indigo);
  font-weight: 900;
}
.module-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .85rem; }
.module-card {
  display: grid;
  grid-template-columns: 58px 1fr auto;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  color: var(--ink);
  text-decoration: none;
  transition: transform .15s ease, border-color .15s ease, box-shadow .15s ease;
}
.module-card:hover { transform: translateY(-2px); border-color: var(--indigo); box-shadow: var(--shadow); }
.module-card .module-num { font-size: .72rem; font-weight: 900; letter-spacing: .07em; color: var(--indigo); text-transform: uppercase; }
.module-card strong { display: block; line-height: 1.3; }
.module-card small { display: block; color: var(--ink-soft); margin-top: .2rem; }
.module-card .arrow { color: var(--ink-faint); }

.callout {
  padding: 1.25rem 1.35rem;
  border: 1px solid var(--line);
  border-left: 4px solid var(--indigo);
  border-radius: 12px;
  background: var(--indigo-soft);
}
.callout.privacy { border-left-color: var(--green); background: var(--green-soft); }
.callout.warning { border-left-color: var(--amber); background: var(--amber-soft); }
.callout strong { display: block; margin-bottom: .25rem; }
.clean-list { margin: .6rem 0 0; padding-left: 1.25rem; }
.clean-list li { margin: .4rem 0; }

.timeline { position: relative; display: grid; gap: .8rem; }
.timeline-item { display: grid; grid-template-columns: 44px 1fr; gap: .9rem; align-items: start; }
.timeline-marker { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; background: var(--rose-soft); color: var(--rose); font-weight: 900; }
.timeline-copy { padding: .2rem 0 1rem; border-bottom: 1px solid var(--line); }

.tag-row { display: flex; flex-wrap: wrap; gap: .45rem; margin-top: .7rem; }
.tag { padding: .2rem .55rem; border-radius: 999px; background: var(--surface-soft); color: var(--ink-soft); font-size: .75rem; font-weight: 700; }

.site-footer { padding: 2rem 1.25rem; border-top: 1px solid var(--line); text-align: center; color: var(--ink-faint); font-size: .84rem; }

@media (max-width: 760px) {
  .grid.two, .grid.three, .module-grid { grid-template-columns: 1fr; }
  .header-title, .header-divider { display: none; }
  .hero { padding-top: 4rem; }
  .container { padding-top: 3.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}