/* Shared chrome: nav + footer + page-hero used across subpages */

/* ---------- NAV ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  height: 64px; width: 100%;
  transition: background-color 200ms var(--ease-out), border-color 200ms var(--ease-out);
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(250, 251, 252, 0.85);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
}
.nav.transparent { border-bottom-color: transparent; background: transparent; backdrop-filter: none; -webkit-backdrop-filter: none; }
.nav.scrolled {
  background: rgba(250, 251, 252, 0.9);
  border-bottom-color: var(--border-subtle);
}
.nav-row { height: 64px; display: flex; align-items: center; justify-content: space-between; }
.logo {
  font-family: 'Inter Tight', sans-serif;
  font-weight: 700; font-size: 18px; letter-spacing: -0.04em;
  color: var(--text-primary);
  display: inline-flex; align-items: baseline;
  text-decoration: none;
}
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a {
  font-size: 14px; font-weight: 500; color: var(--text-secondary);
  transition: color 150ms; position: relative;
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a.active { color: var(--text-primary); }
.nav-links a.active::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -22px; height: 2px;
  background: var(--accent);
}
.nav-cta { margin-left: 16px; }
.lang-switch {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px; color: var(--text-muted) !important;
  letter-spacing: 0.04em;
  padding: 6px 10px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
  transition: border-color 150ms, color 150ms;
  margin-left: 8px;
}
.lang-switch:hover { color: var(--text-primary) !important; border-color: var(--border-strong); }
.lang-switch .sep { color: var(--border-strong); margin: 0 4px; }
.nav-burger { display: none; }
@media (max-width: 767px) {
  .nav-links { display: none; }
  .nav-burger {
    display: inline-flex; width: 40px; height: 40px;
    align-items: center; justify-content: center; border-radius: var(--r-md);
  }
  .nav-cta { margin-left: 0; padding: 8px 14px; font-size: 13px; }
}

.mob-menu {
  display: none;
  position: fixed; top: 64px; left: 0; right: 0; bottom: 0;
  background: var(--bg-primary); z-index: 49;
  padding: 24px;
  flex-direction: column; gap: 4px;
}
.mob-menu.open { display: flex; }
.mob-menu a {
  padding: 16px 0; font-size: 18px; color: var(--text-primary);
  border-bottom: 1px solid var(--border-subtle);
  display: flex; justify-content: space-between; align-items: center;
}
.mob-menu .btn { margin-top: 24px; }

/* ---------- FOOTER ---------- */
.footer { background: var(--bg-secondary); padding: 80px 0 48px; margin-top: 128px; }
.footer-top { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 56px; }
@media (max-width: 1023px) { .footer-top { grid-template-columns: 1fr 1fr; gap: 40px 56px; } }
@media (max-width: 767px)  { .footer-top { grid-template-columns: 1fr; gap: 40px; } }
.footer .tag { color: var(--text-secondary); font-size: 14px; margin-top: 16px; line-height: 1.55; max-width: 280px; }
.footer-col h4 {
  font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-muted); font-weight: 500; margin: 0 0 20px;
  font-family: 'Inter', sans-serif;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 12px; }
.footer-col a, .footer-col li { font-size: 14px; color: var(--text-secondary); transition: color 150ms; }
.footer-col a:hover { color: var(--text-primary); }
.footer .qr-row { display: flex; gap: 16px; margin-top: 8px; }
.footer .qr {
  width: 88px; height: 88px; padding: 8px;
  background: white; border-radius: var(--r-sm); border: 1px solid var(--border-subtle);
  display: flex; flex-direction: column;
}
.footer .qr .qrbox {
  flex: 1;
  background-image: repeating-linear-gradient(45deg, #0B0E14 0 2px, transparent 2px 4px),
                    repeating-linear-gradient(-45deg, #0B0E14 0 2px, transparent 2px 4px);
  background-size: 8px 8px;
  border-radius: 2px;
  position: relative;
}
.footer .qr .qrbox::before, .footer .qr .qrbox::after {
  content: ''; position: absolute; width: 14px; height: 14px;
  border: 2px solid #0B0E14; background: white;
}
.footer .qr .qrbox::before { top: 2px; left: 2px; }
.footer .qr .qrbox::after { top: 2px; right: 2px; }
.footer .qr .lbl {
  font-size: 10px; color: var(--text-muted); text-align: center; padding-top: 4px;
  letter-spacing: 0.04em;
}
.footer-bottom {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--border-subtle);
  font-size: 12px; color: var(--text-muted);
}

/* ---------- Page hero (used on subpages) ---------- */
.page-hero { padding: 96px 0 64px; }
.page-hero .eyebrow { margin-bottom: 16px; }
.page-hero h1 { font-size: 56px; font-weight: 600; letter-spacing: -0.025em; line-height: 1.08; max-width: 880px; margin: 0; color: var(--text-primary); font-family: 'Inter Tight', sans-serif; }
.page-hero .sub { margin-top: 24px; font-size: 19px; color: var(--text-secondary); line-height: 1.5; max-width: 640px; }
@media (max-width: 767px) { .page-hero h1 { font-size: 36px; } .page-hero .sub { font-size: 16px; } }

/* ---------- Section utilities used on subpages ---------- */
.h-rule {
  height: 1px; background: var(--border-subtle); width: 100%;
}
.page-cta-band {
  margin-top: 96px;
  padding: 56px;
  background: var(--text-primary); color: white;
  border-radius: var(--r-xl);
  display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap;
}
.page-cta-band h2 { color: white; max-width: 580px; }
.page-cta-band .btn { background: white; color: var(--text-primary); }
.page-cta-band .btn:hover { background: var(--bg-secondary); transform: scale(1.01); }

/* Keyboard focus ring — applies to all pages via chrome.css */
a:focus-visible, button:focus-visible, [role="button"]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ===== Mobile tightening (≤ 480px) ===== */
@media (max-width: 480px) {
  .nav { height: 56px; }
  .nav-row { height: 56px; }
  .logo { font-size: 16px; }
  .page-hero h1 { font-size: 30px; }
  .page-hero .sub { font-size: 15px; line-height: 1.55; }
  .page-hero { padding: 56px 0 32px; }
  .footer { padding: 56px 0 32px; margin-top: 80px; }
  .footer-bottom { font-size: 11px; margin-top: 32px; padding-top: 24px; }
  .mob-menu { top: 56px; padding: 20px; }
  .nav.scrolled { backdrop-filter: saturate(160%) blur(10px); }
  .page-cta-band { padding: 32px 24px; gap: 24px; }
  .page-cta-band h2 { font-size: 22px; }
  .page-cta-band .btn { width: 100%; justify-content: center; }
}