:root {
  --ink: #14304A;
  --ink-soft: #3D566E;
  --muted: #5B7186;
  --bg: #F6F8FA;
  --card: #FFFFFF;
  --line: #E3E9EF;
  --accent: #1F5EDB;
  --accent-soft: #EAF0FC;
  --green: #0E8A5F;
  --green-soft: #E8F5EF;
  --amber: #B45309;
  --amber-soft: #FEF3E2;
  --radius: 14px;
  --font-display: "Archivo", sans-serif;
  --font-body: "Public Sans", sans-serif;
  --font-num: "IBM Plex Mono", monospace;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-body); color: var(--ink); background: var(--bg); line-height: 1.65; font-size: 16px; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

header { background: var(--card); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 50; }
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand-group { display: flex; flex-direction: column; line-height: 1.1; }
.brand { font-family: var(--font-display); font-weight: 800; font-size: 1.15rem; color: var(--ink); text-decoration: none; letter-spacing: -0.02em; }
.brand span { color: var(--accent); }
.tagline { font-size: 0.68rem; color: var(--muted); font-weight: 500; }
.nav-links { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.nav-links a { color: var(--ink-soft); text-decoration: none; font-size: 0.84rem; font-weight: 500; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--accent); }

.nav-dropdown { position: relative; }
.nav-dropdown-trigger {
  background: none; border: none; font-family: var(--font-body); font-size: 0.82rem; font-weight: 500;
  color: var(--ink-soft); cursor: pointer; padding: 6px 0; display: inline-flex; align-items: center; gap: 4px;
}
.nav-dropdown-trigger:hover, .nav-dropdown.active .nav-dropdown-trigger { color: var(--accent); }
.nav-dropdown-trigger .caret { font-size: 0.6rem; transition: transform 0.15s; }
.nav-dropdown:hover .nav-dropdown-trigger .caret, .nav-dropdown:focus-within .nav-dropdown-trigger .caret { transform: rotate(180deg); }
.nav-dropdown-menu {
  display: none; position: absolute; top: 100%; left: 50%; transform: translateX(-50%);
  background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 8px;
  min-width: 230px; box-shadow: 0 12px 28px rgba(20,48,74,0.10); flex-direction: column; gap: 2px;
  margin-top: 0; padding-top: 16px; z-index: 60;
}
.nav-dropdown:hover .nav-dropdown-menu, .nav-dropdown:focus-within .nav-dropdown-menu { display: flex; }
.nav-dropdown-menu::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 14px;
  background: transparent;
}
.nav-dropdown-menu a { padding: 9px 12px; border-radius: 8px; font-size: 0.85rem; color: var(--ink-soft); white-space: nowrap; }
.nav-dropdown-menu a:hover, .nav-dropdown-menu a[aria-current="page"] { background: var(--accent-soft); color: var(--accent); }

footer { margin-top: 64px; border-top: 1px solid var(--line); background: var(--card); padding: 36px 0; font-size: 0.85rem; color: var(--muted); }
.foot { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.foot a { color: var(--ink-soft); text-decoration: none; }
.foot a:hover { color: var(--accent); }
.foot .foot-links { display: flex; gap: 18px; flex-wrap: wrap; }

@media (max-width: 860px) { .nav-links { display: none; } }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }