:root {
  --bg: #0b1020;
  --panel: #0f172a;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --brand: #22d3ee;
  --brand-ink: #06252a;
  --border: #1f2937;
  --card: #111827;
  --shadow: 0 6px 24px rgba(0,0,0,0.25);
  --radius: 12px;
  --radius-sm: 8px;
  --container: 1100px;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }
body {
  margin: 0;
  font: 500 16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background: linear-gradient(180deg, var(--bg), #0b1228 60%, #0d132b);
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
p { margin: 0 0 1rem; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 0.6rem; }

.container {
  width: 100%;
  max-width: var(--container);
  padding: 0 1rem;
  margin: 0 auto;
}

.skip-link {
  position: absolute; left: -9999px; top: -9999px;
}
.skip-link:focus {
  left: 1rem; top: 1rem; background: var(--brand); color: var(--brand-ink);
  padding: 0.5rem 0.75rem; border-radius: var(--radius-sm); z-index: 1000;
}

.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand { display: inline-flex; gap: 0.6rem; align-items: center; font-weight: 700; }
.brand img { filter: drop-shadow(0 2px 8px rgba(34,211,238,0.35)); }

.nav { display: flex; gap: 1rem; align-items: center; }
.nav a { color: var(--muted); }
.nav a:hover { color: var(--text); }

.nav-toggle {
  display: none; background: transparent; border: 1px solid var(--border);
  color: var(--text); border-radius: var(--radius-sm); padding: 0.35rem 0.5rem; cursor: pointer;
}

.hero {
  padding: 6rem 0 3rem;
  background:
    radial-gradient(800px 300px at 20% -10%, rgba(34,211,238,0.12), transparent 50%),
    radial-gradient(800px 300px at 80% -10%, rgba(59,130,246,0.10), transparent 50%);
}
.lead { color: var(--muted); font-size: 1.125rem; max-width: 60ch; }
.actions { display: flex; gap: 0.75rem; margin-top: 1rem; flex-wrap: wrap; }

.section { padding: 3rem 0; }
.section.alt { background: linear-gradient(180deg, rgba(255,255,255,0.02), transparent); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.grid {
  display: grid; gap: 1rem;
  grid-template-columns: repeat(12, 1fr);
}
.card {
  grid-column: span 6;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1rem; box-shadow: var(--shadow);
}
.card h3 { margin-bottom: 0.25rem; }

.form { max-width: 640px; }
.field { margin-bottom: 1rem; }
label { display: inline-block; margin-bottom: 0.35rem; color: var(--muted); }
input, textarea {
  width: 100%; padding: 0.7rem 0.8rem; color: var(--text);
  background: #0a0f1d; border: 1px solid var(--border); border-radius: var(--radius-sm);
}
input:focus, textarea:focus { outline: 2px solid rgba(34,211,238,0.4); outline-offset: 2px; }
.error { color: #fca5a5; height: 1.1rem; display: block; }
.status { min-height: 1.1rem; margin-top: 0.5rem; color: #86efac; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
  padding: 0.6rem 0.9rem; border-radius: var(--radius-sm);
  background: var(--brand); color: var(--brand-ink); font-weight: 700; border: 1px solid transparent;
}
.btn:hover { filter: brightness(1.02) saturate(1.05); transform: translateY(-1px); transition: transform 120ms ease; }
.btn-secondary { background: transparent; color: var(--text); border-color: var(--border); }
.btn-small { padding: 0.4rem 0.6rem; font-weight: 600; }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0; color: var(--muted);
}
.site-footer .container { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; }
.footer-nav { display: flex; gap: 1rem; }

@media (max-width: 900px) {
  .grid { grid-template-columns: 1fr; }
  .card { grid-column: auto; }
  .nav { position: absolute; top: 64px; right: 1rem; left: 1rem; flex-direction: column; gap: 0.5rem;
    background: var(--panel); padding: 0.75rem; border: 1px solid var(--border); border-radius: var(--radius); display: none; }
  .nav[aria-expanded="true"] { display: flex; }
  .nav-toggle { display: inline-flex; }
}