/* Erudio — erudio.ink landing page
   Built on the design tokens in tokens.css. No hardcoded colors:
   every value resolves to a --color-* / --text-* / --space-* token. */

/* ---- Self-hosted fonts (no external CDN) ---- */
@font-face {
  font-family: "Cinzel";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("/fonts/cinzel-600.woff2") format("woff2");
}
@font-face {
  font-family: "EB Garamond";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("/fonts/ebgaramond-400.woff2") format("woff2");
}
@font-face {
  font-family: "EB Garamond";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("/fonts/ebgaramond-500.woff2") format("woff2");
}
@font-face {
  font-family: "EB Garamond";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("/fonts/ebgaramond-600.woff2") format("woff2");
}
@font-face {
  font-family: "EB Garamond";
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url("/fonts/ebgaramond-400i.woff2") format("woff2");
}
@font-face {
  font-family: "EB Garamond";
  font-style: italic;
  font-weight: 500;
  font-display: swap;
  src: url("/fonts/ebgaramond-500i.woff2") format("woff2");
}

/* ---- Reset / base ---- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: var(--lh-body);
  font-weight: var(--weight-regular);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, p, ul { margin: 0; }
a { color: var(--color-accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--color-accent-hover); }

:focus-visible {
  outline: var(--border-strong) solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ---- Helpers ---- */
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.skip-link {
  position: absolute; left: var(--space-4); top: -120px;
  background: var(--color-surface); color: var(--color-text-primary);
  padding: var(--space-3) var(--space-4); border: var(--border-hairline) solid var(--color-border);
  border-radius: var(--radius-md); z-index: 10; transition: top 0.15s ease;
}
.skip-link:focus { top: var(--space-4); }

/* Reading measure — generous editorial column */
.measure { max-width: 40rem; margin-inline: auto; padding-inline: var(--space-5); }

/* ---- Buttons ---- */
.btn {
  display: inline-block; font-family: var(--font-body); font-weight: var(--weight-medium);
  font-size: var(--text-body); line-height: 1.2; text-align: center; text-decoration: none;
  border: var(--border-hairline) solid transparent; border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-5); cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn-primary { color: var(--color-accent-contrast); background: var(--color-accent); border-color: var(--color-accent); }
.btn-primary:hover { background: var(--color-accent-hover); border-color: var(--color-accent-hover); color: var(--color-accent-contrast); }
.btn-sm { padding: var(--space-2) var(--space-4); font-size: var(--text-body-sm); }

/* ---- Header ---- */
.site-header {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-4);
  max-width: 64rem; margin-inline: auto;
  padding: var(--space-5) var(--space-5);
}
.wordmark {
  font-family: var(--font-display); font-weight: var(--weight-semibold);
  font-size: var(--text-title); letter-spacing: 0.08em; color: var(--color-text-primary);
  text-decoration: none; text-transform: uppercase;
}
.site-header__actions { display: flex; align-items: center; gap: var(--space-3); }

.theme-toggle {
  width: 36px; height: 36px; padding: 0; display: inline-flex; align-items: center; justify-content: center;
  background: transparent; color: var(--color-text-secondary);
  border: var(--border-hairline) solid var(--color-border); border-radius: var(--radius-md); cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.theme-toggle:hover { color: var(--color-accent); border-color: var(--color-border-strong); }
.theme-toggle::before { content: "☾"; font-size: 16px; line-height: 1; }
:root[data-theme="dark"] .theme-toggle::before { content: "☀"; }

/* ---- Sections / rhythm ---- */
.section { padding-block: var(--space-9); }
.section--center { text-align: center; }
.hero { padding-block: var(--space-9) var(--space-8); }

/* ---- Hero ---- */
.eyebrow {
  font-family: var(--font-body); font-style: italic; color: var(--color-text-secondary);
  font-size: var(--text-body-lg); margin-bottom: var(--space-4);
}
.hero__headline {
  font-family: var(--font-display); font-weight: var(--weight-semibold);
  font-size: var(--text-display-xl); line-height: var(--lh-display-xl); letter-spacing: var(--tracking-display-xl);
  color: var(--color-text-primary); margin-bottom: var(--space-5); text-wrap: balance;
}
.hero__subhead {
  font-size: var(--text-body-lg); line-height: var(--lh-body-lg); color: var(--color-text-secondary);
  margin-bottom: var(--space-7); max-width: 34rem;
}

/* ---- Capture forms ---- */
.capture { margin-top: var(--space-5); }
.capture__row { display: flex; gap: var(--space-3); flex-wrap: wrap; }
.capture__input {
  flex: 1 1 16rem; min-width: 0;
  font-family: var(--font-body); font-size: var(--text-body); color: var(--color-text-primary);
  background: var(--color-surface); border: var(--border-hairline) solid var(--color-border-strong);
  border-radius: var(--radius-md); padding: var(--space-3) var(--space-4);
  transition: border-color 0.15s ease;
}
.capture__input::placeholder { color: var(--color-text-muted); }
.capture__input:focus-visible { outline: none; border-color: var(--color-accent); box-shadow: 0 0 0 2px var(--color-accent-subtle); }
.capture .btn-primary { flex: 0 0 auto; }

.capture__field { margin-top: var(--space-3); display: flex; flex-direction: column; gap: var(--space-2); }
.capture__field label { font-size: var(--text-body-sm); color: var(--color-text-secondary); }
.capture__field .optional { color: var(--color-text-muted); }
.capture__field input {
  font-family: var(--font-body); font-size: var(--text-body); color: var(--color-text-primary);
  background: var(--color-surface); border: var(--border-hairline) solid var(--color-border-strong);
  border-radius: var(--radius-md); padding: var(--space-3) var(--space-4);
}
.capture__field input:focus-visible { outline: none; border-color: var(--color-accent); box-shadow: 0 0 0 2px var(--color-accent-subtle); }

.capture__status { margin-top: var(--space-3); font-size: var(--text-body-sm); min-height: 1.4em; color: var(--color-text-secondary); }
.capture__status.is-error { color: var(--color-accent); }
.capture.is-done .capture__status {
  color: var(--color-text-primary); font-size: var(--text-body-lg);
  font-style: italic; margin-top: var(--space-2);
}

/* ---- 3 — What it is (lede) ---- */
.lede {
  font-family: var(--font-body); font-size: var(--text-heading); line-height: 1.45;
  color: var(--color-text-primary); text-wrap: balance;
}

/* ---- 4 — Proof ---- */
.proof .measure { max-width: 42rem; }
.proof__lead {
  font-family: var(--font-display); font-weight: var(--weight-semibold);
  font-size: var(--text-display-l); line-height: var(--lh-display-l); letter-spacing: var(--tracking-display-l);
  margin-bottom: var(--space-5); text-wrap: balance;
}
.proof__support { font-size: var(--text-body-lg); line-height: var(--lh-body-lg); color: var(--color-text-secondary); margin-bottom: var(--space-6); }
.relief { list-style: none; padding: 0; margin: 0 0 var(--space-4); display: grid; gap: var(--space-3); }
.relief li {
  position: relative; padding-left: var(--space-6);
  font-size: var(--text-body-lg); line-height: 1.4; color: var(--color-text-primary);
}
.relief li::before {
  content: ""; position: absolute; left: 0; top: 0.62em;
  width: var(--space-4); height: 2px; background: var(--color-accent); border-radius: var(--radius-sm);
}
.proof__summary { font-size: var(--text-body-lg); color: var(--color-text-secondary); margin-bottom: var(--space-7); }
.proof__dignity {
  font-size: var(--text-title); line-height: 1.45; color: var(--color-text-primary);
  padding-left: var(--space-5); border-left: var(--border-strong) solid var(--color-accent);
  margin-bottom: var(--space-6);
}
.proof__archive { font-size: var(--text-body-lg); line-height: var(--lh-body-lg); color: var(--color-text-secondary); }

/* ---- 5 — Who it's for ---- */
.who__line {
  font-family: var(--font-body); font-style: italic; font-size: var(--text-heading); line-height: 1.4;
  color: var(--color-text-secondary); text-wrap: balance;
}

/* ---- 6 — The inversion ---- */
.inversion { padding-block: var(--space-9); }
.inversion .measure { max-width: 44rem; }
.inversion__line {
  font-family: var(--font-body); font-weight: var(--weight-medium);
  font-size: var(--text-display-l); line-height: 1.25; color: var(--color-text-primary);
  text-align: center; text-wrap: balance;
}

/* ---- 7 — Close ---- */
.close {
  background: var(--color-surface); border-block: var(--border-hairline) solid var(--color-border);
}
.close__scarcity { font-size: var(--text-body-lg); color: var(--color-text-secondary); margin-bottom: var(--space-5); }
.close .capture { max-width: 34rem; }
.tagline {
  font-family: var(--font-display); font-weight: var(--weight-semibold);
  font-size: var(--text-heading); line-height: 1.3; letter-spacing: 0.02em;
  color: var(--color-text-primary); margin-top: var(--space-7); text-transform: none;
}

/* ---- 8 — Footer ---- */
.site-footer { padding-block: var(--space-7); border-top: var(--border-hairline) solid var(--color-border); }
.site-footer__line { font-size: var(--text-body-sm); color: var(--color-text-muted); }
.site-footer__line a { color: var(--color-text-secondary); }
.site-footer__line a:hover { color: var(--color-accent); }

/* ---- Responsive ---- */
@media (max-width: 34rem) {
  :root { --text-display-xl: 40px; --text-display-l: 30px; }
  .capture .btn-primary { flex: 1 1 100%; }
  .section, .hero, .inversion { padding-block: var(--space-8); }
}