/**
 * Shared layout: nav, footer, page-hero.
 * Used by index and all subpages for a unified shell.
 */
.ms { font-family: 'Material Symbols Outlined'; font-weight: 300; font-style: normal; }

body { min-width: 420px; }

:root {
  --grey-0: #FFFFFF;
  --grey-10: #F8F9FC;
  --grey-20: #EFF2F7;
  --grey-800: #45474D;
  --grey-900: #2F3034;
  --grey-1200: #121317;
  --blue-600: #3279F9;
  --surface: var(--grey-0);
  --on-surface: var(--grey-1200);
  --on-surface-variant: var(--grey-800);
  --surface-container: var(--grey-10);
  --surface-container-high: var(--grey-20);
  --outline: rgba(33,34,38,.12);
  --outline-variant: rgba(33,34,38,.06);
  --nav-height: 56px;
  --page-margin: 72px;
  --grid-gutter: 64px;
  --corner-full: 9999px;
  --corner-md: 16px;
}
@media (max-width: 1024px) { :root { --page-margin: 40px; --grid-gutter: 40px; } }
@media (max-width: 767px) { :root { --page-margin: 16px; } }

/* Nav */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-height);
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--outline);
  display: flex; align-items: center;
}
.nav-inner {
  width: 100%; max-width: 1440px; margin: 0 auto; padding: 0 var(--page-margin);
  display: flex; align-items: center; justify-content: space-between;
}
.nav-brand {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; color: var(--on-surface);
}
.nav-brand img { height: 28px; width: 28px; flex-shrink: 0; }
.nav-brand-text { font-size: 17px; font-weight: 500; letter-spacing: -.02em; }
.nav-brand-text span { color: var(--on-surface-variant); font-weight: 400; }
.nav-links { display: flex; align-items: center; gap: 8px; }
.nav-links a {
  font-size: 14.5px; font-weight: 450;
  padding: 6px 14px; border-radius: var(--corner-full);
  color: var(--on-surface-variant);
  transition: background .2s, color .2s;
}
.nav-links a:hover { background: var(--surface-container); color: var(--on-surface); }
.nav-dropdown { position: relative; display: flex; align-items: center; }
.nav-dropdown-trigger {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 14.5px; font-weight: 450; letter-spacing: .01em;
  padding: 6px 14px; border-radius: var(--corner-full);
  color: var(--on-surface-variant); background: none; border: none; cursor: pointer; font-family: inherit;
  transition: background .2s, color .2s;
}
.nav-dropdown-trigger:hover { background: var(--surface-container); color: var(--on-surface); }
.nav-dropdown-trigger .ms { font-size: 18px; transition: transform .2s; }
.nav-dropdown:hover .nav-dropdown-trigger .ms { transform: rotate(180deg); }
.nav-dropdown-menu {
  position: absolute; top: 100%; left: 0; margin-top: 2px; min-width: 140px; padding: 6px 0;
  background: var(--surface); border: 1px solid var(--outline); border-radius: var(--corner-md);
  box-shadow: 0 8px 24px rgba(0,0,0,.08);
  opacity: 0; visibility: hidden; transition: opacity .2s, visibility .2s; z-index: 200;
}
.nav-dropdown:hover .nav-dropdown-menu { opacity: 1; visibility: visible; }
.nav-dropdown-menu a { display: block; font-size: 14.5px; font-weight: 450; padding: 8px 16px; color: var(--on-surface-variant); transition: background .2s, color .2s; }
.nav-dropdown-menu a:hover { background: var(--surface-container); color: var(--on-surface); }
.nav-cta {
  font-size: 14.5px; font-weight: 500;
  padding: 8px 20px; border-radius: var(--corner-full);
  background: var(--on-surface); color: var(--surface);
  transition: background .2s;
}
.nav-cta:hover { background: var(--grey-900); }
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: none;
  background: none;
  color: var(--on-surface-variant);
  cursor: pointer;
  border-radius: var(--corner-full);
  transition: background .2s, color .2s;
}
.nav-toggle:hover { background: var(--surface-container); color: var(--on-surface); }
.nav-toggle .ms { font-size: 24px; }
.nav-menu { display: flex; align-items: center; gap: 8px; }
.nav-mobile-only { display: none; }
@media (max-width: 767px) {
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .nav-menu {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 16px var(--page-margin) 24px;
    background: rgba(255,255,255,.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--outline);
    box-shadow: 0 12px 24px rgba(0,0,0,.08);
    z-index: 99;
    max-height: calc(100vh - var(--nav-height));
    overflow-y: auto;
  }
  .nav.nav-open .nav-menu { display: flex; }
  .nav-menu .nav-links {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }
  .nav-menu .nav-links > a,
  .nav-menu .nav-mobile-only {
    display: block;
    padding: 12px 16px;
    border-radius: var(--corner-md);
  }
  .nav-menu .nav-dropdown { display: none; }
  .nav-menu .nav-mobile-only { display: block !important; }
  .nav-menu .nav-cta {
    display: block;
    text-align: center;
    margin-top: 12px;
    padding: 12px 20px;
  }
}

/* Page hero (subpages) */
.page-hero {
  padding: calc(var(--nav-height) + 80px) 0 48px;
  border-bottom: 1px solid var(--outline-variant);
  background: var(--surface-container);
}
.page-hero-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 var(--page-margin);
}
.page-hero .label {
  font-size: 14px; font-weight: 500; letter-spacing: .04em;
  text-transform: uppercase; color: var(--on-surface-variant);
  margin-bottom: 12px;
}
.page-hero h1 {
  font-size: clamp(28px, 4vw, 36px);
  font-weight: 500;
  letter-spacing: -.02em;
  line-height: 1.2;
}
.page-hero .lead {
  font-size: 18px;
  color: var(--on-surface-variant);
  margin-top: 16px;
  line-height: 1.5;
}

/* Footer */
.footer {
  padding: 72px 0 36px;
  border-top: 1px solid var(--outline-variant);
  background: linear-gradient(180deg, var(--surface-container-high) 0%, var(--surface-container) 100%);
  position: relative;
}
.footer::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent 0%, var(--blue-600) 20%, var(--blue-600) 80%, transparent 100%);
  opacity: .35;
}
.footer-inner { max-width: 1440px; margin: 0 auto; padding: 0 var(--page-margin); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr repeat(3, 1fr);
  gap: var(--grid-gutter);
  align-items: start;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--outline-variant);
  margin-bottom: 32px;
}
.footer-brand { display: flex; flex-direction: column; gap: 14px; }
.footer-brand a { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; color: inherit; transition: opacity .2s; }
.footer-brand a:hover { opacity: .85; }
.footer-brand a img { height: 36px; width: 36px; flex-shrink: 0; }
.footer-brand-text { font-size: 20px; font-weight: 500; letter-spacing: -.02em; color: var(--on-surface); }
.footer-brand-text span { color: var(--on-surface-variant); font-weight: 400; }
.footer-tagline { font-size: 14px; color: var(--on-surface-variant); max-width: 260px; line-height: 1.5; }
.footer-col h4 { font-size: 11px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--on-surface-variant); margin-bottom: 16px; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a { font-size: 14px; color: var(--on-surface-variant); text-decoration: none; transition: color .2s; }
.footer-col a:hover { color: var(--on-surface); }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; font-size: 13px; color: var(--on-surface-variant); }
.footer-bottom-right { display: flex; align-items: center; flex-wrap: wrap; gap: 24px; }
.footer-legal { display: flex; flex-wrap: wrap; gap: 24px; }
.footer-legal a { font-size: 13px; color: var(--on-surface-variant); text-decoration: none; transition: color .2s; }
.footer-legal a:hover { color: var(--on-surface); }
.footer-back-top { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 500; color: var(--on-surface-variant); text-decoration: none; transition: color .2s; }
.footer-back-top:hover { color: var(--blue-600); }
.footer-back-top .ms { font-size: 18px; }
@media (max-width: 1024px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; } }
@media (max-width: 767px) {
  .footer { padding: 48px 0 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; padding-bottom: 32px; margin-bottom: 24px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}