/* ==========================================================================
   components.css: shared layout, header, footer, buttons, cards, hero
   ========================================================================== */

/* ---------- Layout primitives ---------- */
.wrap { width: 100%; max-width: var(--content-wide); margin-inline: auto; padding-inline: var(--space-6); }
.wrap-default { max-width: var(--content-default); }
.wrap-narrow { max-width: var(--content-narrow); }
.section { padding-block: clamp(3.5rem, 8vw, 7rem); }
.section-tight { padding-block: clamp(2.5rem, 5vw, 4rem); }

main { display: block; }
.eyebrow {
  font-family: var(--font-mono); font-size: var(--text-xs); letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--color-primary); font-weight: 600;
  display: inline-flex; align-items: center; gap: 0.6em; margin-bottom: var(--space-4);
}
.eyebrow::before { content: ""; width: 1.6rem; height: 2px; background: var(--color-primary); border-radius: 2px; }
.section-title { font-size: var(--text-2xl); margin-bottom: var(--space-4); letter-spacing: -0.02em; }
.lede { font-size: var(--text-lg); color: var(--color-text-muted); max-width: 60ch; line-height: 1.5; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.55em; font-weight: 600;
  font-size: var(--text-sm); padding: 0.7em 1.3em; border-radius: var(--radius-full);
  text-decoration: none; border: 1.5px solid transparent; line-height: 1;
}
.btn svg { width: 1.05em; height: 1.05em; }
.btn-primary { background: var(--color-primary); color: #fff; box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--color-primary-hover); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-ghost { background: transparent; color: var(--color-text); border-color: var(--color-border); }
.btn-ghost:hover { border-color: var(--color-primary); color: var(--color-primary); transform: translateY(-2px); }
.btn-lg { font-size: var(--text-base); padding: 0.85em 1.6em; }

.textlink { color: var(--color-primary); text-decoration: none; font-weight: 600; border-bottom: 1.5px solid transparent; }
.textlink:hover { border-bottom-color: var(--color-primary); }
.textlink .arrow { display: inline-block; transition: transform var(--transition-interactive); }
.textlink:hover .arrow { transform: translateX(4px); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in oklab, var(--color-bg) 78%, transparent);
  backdrop-filter: saturate(160%) blur(14px); -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid transparent; transition: border-color var(--transition-interactive), background var(--transition-interactive);
}
.site-header.scrolled { border-bottom-color: var(--color-divider); background: color-mix(in oklab, var(--color-bg) 90%, transparent); }
.header-inner {
  max-width: var(--content-wide); margin-inline: auto; padding: 0.7rem var(--space-6);
  display: flex; align-items: center; gap: var(--space-6);
}
.brand { display: inline-flex; align-items: center; gap: 0.6rem; text-decoration: none; color: var(--color-text); font-family: var(--font-display); font-weight: 600; font-size: 1.05rem; }
.logo-mark { width: 30px; height: 30px; color: var(--color-primary); flex: none; }
.brand-text { letter-spacing: -0.01em; }
.site-nav { margin-left: auto; }
.nav-links { display: flex; gap: 0.35rem; }
.nav-links a {
  text-decoration: none; color: var(--color-text-muted); font-size: var(--text-sm); font-weight: 500;
  padding: 0.45em 0.75em; border-radius: var(--radius-full); position: relative;
}
.nav-links a:hover { color: var(--color-text); background: var(--color-surface-offset); }
.nav-links a[aria-current="page"] { color: var(--color-primary); background: var(--color-primary-soft); }
.header-actions { display: flex; align-items: center; gap: 0.4rem; }
.theme-toggle {
  width: 38px; height: 38px; border-radius: var(--radius-full); display: grid; place-items: center;
  color: var(--color-text-muted); border: 1px solid var(--color-border); background: var(--color-surface);
}
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle:hover { color: var(--color-primary); border-color: var(--color-primary); transform: rotate(15deg); }
.nav-burger { display: none; width: 40px; height: 40px; border-radius: var(--radius-md); flex-direction: column; gap: 5px; align-items: center; justify-content: center; border: 1px solid var(--color-border); background: var(--color-surface); }
.nav-burger span { width: 18px; height: 2px; background: var(--color-text); border-radius: 2px; transition: transform var(--transition-interactive), opacity var(--transition-interactive); }
.nav-burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.mobile-menu { display: none; flex-direction: column; padding: var(--space-2) var(--space-6) var(--space-5); gap: 0.15rem; border-bottom: 1px solid var(--color-divider); }
.mobile-menu a { text-decoration: none; color: var(--color-text); padding: 0.7em 0.5em; border-radius: var(--radius-md); font-weight: 500; }
.mobile-menu a:hover { background: var(--color-surface-offset); color: var(--color-primary); }

@media (max-width: 860px) {
  .site-nav { display: none; }
  .nav-burger { display: flex; }
  .mobile-menu.open { display: flex; }
  .brand-text { display: none; }
}

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--color-divider); background: var(--color-surface); margin-top: var(--space-24); }
.footer-inner { max-width: var(--content-wide); margin-inline: auto; padding: var(--space-16) var(--space-6); display: grid; gap: var(--space-4); text-align: center; place-items: center; }
.footer-brand { display: inline-flex; align-items: center; gap: 0.55rem; font-family: var(--font-display); font-weight: 600; font-size: 1.15rem; }
.footer-brand .logo-mark { width: 26px; height: 26px; }
.footer-tag { color: var(--color-text-muted); max-width: 42ch; }
.footer-links { display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-5); justify-content: center; }
.footer-links a { text-decoration: none; color: var(--color-text); font-weight: 500; font-size: var(--text-sm); border-bottom: 1.5px solid transparent; padding-bottom: 2px; }
.footer-links a:hover { color: var(--color-primary); border-bottom-color: var(--color-primary); }
.footer-copy { color: var(--color-text-faint); font-size: var(--text-xs); font-family: var(--font-mono); }

/* ---------- Cards ---------- */
.card {
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  padding: var(--space-6); box-shadow: var(--shadow-sm); position: relative; overflow: hidden;
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive), border-color var(--transition-interactive);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: color-mix(in oklab, var(--color-primary) 40%, var(--color-border)); }
.card-link { text-decoration: none; color: inherit; display: block; }
.card h3 { font-size: var(--text-lg); margin-bottom: var(--space-2); letter-spacing: -0.01em; }
.card p { color: var(--color-text-muted); font-size: var(--text-sm); }

/* ---------- Reveal animation ---------- */
[data-reveal] { opacity: 0; transform: translateY(22px); transition: opacity 0.7s var(--transition-interactive), transform 0.7s var(--transition-interactive); }
[data-reveal].is-visible { opacity: 1; transform: none; }
[data-reveal][data-delay="1"] { transition-delay: 0.08s; }
[data-reveal][data-delay="2"] { transition-delay: 0.16s; }
[data-reveal][data-delay="3"] { transition-delay: 0.24s; }
[data-reveal][data-delay="4"] { transition-delay: 0.32s; }

/* ---------- Tags / chips ---------- */
.chip { display: inline-flex; align-items: center; gap: 0.4em; font-size: var(--text-xs); font-weight: 600; font-family: var(--font-mono); letter-spacing: 0.03em; padding: 0.35em 0.75em; border-radius: var(--radius-full); background: var(--color-surface-offset); color: var(--color-text-muted); border: 1px solid var(--color-border); }
.chip-teal { background: var(--color-teal-soft); color: var(--color-teal); border-color: color-mix(in oklab, var(--color-teal) 30%, transparent); }
.chip-gold { background: var(--color-gold-soft); color: var(--color-gold); border-color: color-mix(in oklab, var(--color-gold) 30%, transparent); }
.chip-row { display: flex; flex-wrap: wrap; gap: 0.5rem; }

/* ---------- Divider ---------- */
.rule { height: 1px; background: var(--color-divider); border: 0; margin-block: var(--space-12); }

/* ---------- Page hero (interior pages) ---------- */
.page-hero { padding-top: clamp(3rem, 7vw, 5.5rem); padding-bottom: clamp(2rem, 4vw, 3rem); }
.page-hero h1 { font-size: var(--text-3xl); letter-spacing: -0.03em; margin-bottom: var(--space-4); }
.page-hero .lede { font-size: var(--text-lg); }

/* ---------- Utility ---------- */
.grid { display: grid; gap: var(--space-6); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }
.text-center { text-align: center; }
.mx-auto { margin-inline: auto; }