:root {
  --bg: #f6f7f5;
  --surface: #ffffff;
  --ink: #1f2933;
  --muted: #52606d;
  --brand: #16425b;
  --brand-soft: #2b6a8a;
  --accent: #c47f4f;
  --border: #d9e2ec;
  --shadow: 0 10px 30px rgba(16, 24, 40, 0.08);
  --radius: 14px;
  --max: 1100px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--brand); text-underline-offset: 2px; }

a:hover { color: var(--brand-soft); }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: #fff;
  padding: 0.65rem 0.9rem;
  z-index: 1000;
}

.skip-link:focus { left: 0.5rem; top: 0.5rem; }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(246, 247, 245, 0.94);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border);
}

.wrap {
  width: min(var(--max), 94vw);
  margin: 0 auto;
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 1rem;
}

.brand {
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.01em;
}

.brand small {
  display: block;
  font-weight: 500;
  font-size: 0.78rem;
  color: var(--muted);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink);
  border-radius: 10px;
  padding: 0.45rem 0.65rem;
}

.main-nav ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  gap: 0.9rem;
  align-items: center;
}

.main-nav a {
  text-decoration: none;
  color: var(--ink);
  font-weight: 600;
  padding: 0.45rem 0.6rem;
  border-radius: 8px;
}

.main-nav a[aria-current="page"],
.main-nav a:hover {
  background: #e9eff4;
  color: var(--brand);
}

.hero {
  padding: 4rem 0 2.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 2rem;
  align-items: center;
}

.kicker {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand-soft);
  font-weight: 700;
  margin-bottom: 0.8rem;
}

h1, h2, h3 {
  font-family: "Merriweather", Georgia, serif;
  line-height: 1.25;
  margin-top: 0;
}

h1 { font-size: clamp(1.9rem, 4vw, 3rem); margin-bottom: 1rem; }
h2 { font-size: clamp(1.5rem, 3vw, 2.15rem); margin-bottom: 1rem; }
h3 { font-size: clamp(1.2rem, 2vw, 1.4rem); margin-bottom: 0.6rem; }

.lead {
  font-size: 1.1rem;
  color: #2d3a45;
  max-width: 70ch;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.25rem;
}

.btn {
  display: inline-block;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 0.7rem 1rem;
  font-weight: 700;
}

.btn-primary {
  background: var(--brand);
  color: #fff;
}

.btn-primary:hover { background: #0f3448; color: #fff; }

.btn-secondary {
  border-color: var(--border);
  background: var(--surface);
  color: var(--ink);
}

.btn-secondary:hover { background: #eef2f6; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.15rem;
}

.meta {
  color: var(--muted);
  font-size: 0.94rem;
}

.section { padding: 2.7rem 0; }

.grid {
  display: grid;
  gap: 1rem;
}

.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.tag {
  display: inline-block;
  background: #edf4f9;
  color: #18435d;
  border: 1px solid #cbe0ee;
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  padding: 0.2rem 0.5rem;
}

.pull-quote {
  border-left: 4px solid var(--accent);
  padding: 0.6rem 0 0.6rem 1rem;
  font-style: italic;
  color: #304152;
}

.callout {
  border: 1px solid #efd7c5;
  background: #fff9f4;
  border-radius: 12px;
  padding: 1rem;
}

.article-shell {
  max-width: 760px;
  margin: 0 auto;
}

.article-shell p { margin: 0 0 1rem; }
.article-shell ul { margin: 0 0 1rem 1.1rem; }

.breadcrumbs {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 1rem;
}

.breadcrumbs a { color: var(--muted); }

.featured-img {
  border-radius: 12px;
  border: 1px solid var(--border);
}

.signup {
  background: #ecf3f9;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.signup form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.6rem;
  max-width: 600px;
}

.signup input[type="email"] {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.72rem 0.9rem;
  font-size: 1rem;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.filter-btn {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink);
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
  font-weight: 600;
  cursor: pointer;
}

.filter-btn[aria-pressed="true"] {
  background: var(--brand);
  color: #fff;
  border-color: var(--brand);
}

.site-footer {
  margin-top: 3rem;
  border-top: 1px solid var(--border);
  background: #f0f4f8;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1rem;
  padding: 2rem 0;
}

.footer-nav {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-nav li { margin: 0.35rem 0; }

.small { font-size: 0.9rem; color: var(--muted); }

.hidden { display: none !important; }

@media (max-width: 900px) {
  .hero-grid,
  .grid-3,
  .grid-2,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .signup form { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .nav-toggle { display: inline-block; }

  .main-nav {
    position: absolute;
    right: 3vw;
    top: 68px;
    width: min(320px, 94vw);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: var(--shadow);
    padding: 0.6rem;
    display: none;
  }

  .main-nav.open { display: block; }

  .main-nav ul { flex-direction: column; align-items: stretch; }

  .main-nav a { display: block; }
}