:root {
  --bg: #ffffff;
  --bg-alt: #f5f6f8;
  --text: #1a1d23;
  --text-muted: #5b6270;
  --accent: #2b5cff;
  --accent-dark: #1d3fbf;
  --border: #e3e5ea;
  --placeholder-bg: #fff8e1;
  --placeholder-border: #e6c200;
  --max-width: 1080px;
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12141a;
    --bg-alt: #1a1d24;
    --text: #edeef1;
    --text-muted: #a3a9b7;
    --accent: #6f8dff;
    --accent-dark: #a9b8ff;
    --border: #2a2e38;
    --placeholder-bg: #2a2610;
    --placeholder-border: #a68b00;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header / nav */
header.site-header {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
}
.brand:hover { text-decoration: none; }
.brand span { color: var(--accent); }

nav.main-nav ul {
  list-style: none;
  display: flex;
  gap: 1.75rem;
  margin: 0;
  padding: 0;
}

nav.main-nav a {
  color: var(--text-muted);
  font-weight: 500;
}
nav.main-nav a:hover, nav.main-nav a.active {
  color: var(--text);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.4rem 0.6rem;
  color: var(--text);
  font-size: 1.1rem;
}

@media (max-width: 700px) {
  nav.main-nav {
    display: none;
    width: 100%;
  }
  nav.main-nav.open { display: block; }
  nav.main-nav ul {
    flex-direction: column;
    gap: 0;
    border-top: 1px solid var(--border);
  }
  nav.main-nav li { padding: 0.75rem 0; border-bottom: 1px solid var(--border); }
  .nav-wrap { flex-wrap: wrap; }
  .nav-toggle { display: block; }
}

/* Hero */
.hero {
  padding: 5rem 0 4rem;
  text-align: left;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin: 0 0 0.75rem;
}
.hero .tagline {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 0 2rem;
}
.hero .cta-row { display: flex; gap: 1rem; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 600;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-dark); text-decoration: none; }
.btn-secondary {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn-secondary:hover { border-color: var(--accent); text-decoration: none; }

/* Sections */
section { padding: 3.5rem 0; }
section.alt { background: var(--bg-alt); }
h2.section-title {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}
.section-sub {
  color: var(--text-muted);
  margin-bottom: 2rem;
  max-width: 640px;
}

.grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  background: var(--bg);
}
.card h3 { margin-top: 0; }
.card .tag {
  display: inline-block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin-bottom: 0.5rem;
  font-weight: 700;
}

/* Placeholder styling — deliberately conspicuous so it's obvious what's real */
.placeholder {
  background: var(--placeholder-bg);
  border: 1px dashed var(--placeholder-border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  color: var(--text);
  font-size: 0.95rem;
  margin: 1rem 0;
}
.placeholder strong { color: var(--placeholder-border); }

/* Footer */
footer.site-footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}
footer.site-footer a { color: var(--text-muted); }
.footer-row {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Utility */
.mt-0 { margin-top: 0; }
.text-muted { color: var(--text-muted); }
ul.plain { list-style: none; padding: 0; margin: 0; }