:root {
  --bg: #0f172a;
  --card: #111827;
  --muted: #94a3b8;
  --text: #e5e7eb;
  --accent: #22c55e;
  --accent-2: #a7f3d0;
  --ring: rgba(34, 197, 94, .45);
  --container: 1100px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background: radial-gradient(1200px 600px at 20% -10%, #1f2937 0, transparent 60%), var(--bg);
  line-height: 1.6;
}

.container { width: min(100% - 2rem, var(--container)); margin-inline: auto; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(17, 24, 39, .8); backdrop-filter: blur(6px);
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.flex { display: flex; gap: 1rem; }
.between { justify-content: space-between; }
.center { align-items: center; }

.logo {
  font-weight: 800; font-size: 1.25rem; text-decoration: none; letter-spacing: .3px;
  color: var(--text);
}
.logo span { color: var(--accent); }

.nav .menu-toggle { display: none; font-size: 1.4rem; background: none; border: none; color: var(--text); }
.nav-links { display: flex; gap: 1rem; list-style: none; padding: 0; margin: 0; }
.nav a { color: var(--text); text-decoration: none; opacity: .9; }
.nav a:hover { opacity: 1; text-decoration: underline; text-underline-offset: 3px; }
.nav .divider { width: 1px; background: rgba(255,255,255,.12); margin: 0 .5rem; }

/* Hero */
.hero { padding: 5rem 0 3rem; text-align: center; }
.hero-inner { max-width: 800px; margin: 0 auto; }
.hero h1 { font-size: clamp(2rem, 4vw, 3rem); line-height: 1.15; margin-bottom: .5rem; }
.hero p { color: var(--muted); margin-top: 0; }

.newsletter { display: grid; grid-template-columns: 1fr auto; gap: .6rem; margin-top: 1.2rem; }
.newsletter input {
  padding: .9rem 1rem; border-radius: .8rem; border: 1px solid rgba(255,255,255,.12);
  background: #0b1220; color: var(--text); outline: none;
}
.newsletter input:focus { border-color: var(--accent); box-shadow: 0 0 0 4px var(--ring); }
.newsletter button {
  border: none; border-radius: .8rem; padding: .9rem 1.1rem; font-weight: 600;
  background: linear-gradient(90deg, var(--accent), var(--accent-2)); color: #052e16; cursor: pointer;
}
.newsletter .form-msg { grid-column: 1/-1; margin: 0; color: var(--accent-2); min-height: 1.25rem; }

/* Grid + Cards */
.grid.three { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; padding: 2rem 0; }
.card {
  background: linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,.005));
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 1.25rem; padding: 1.25rem;
  box-shadow: 0 10px 30px rgba(0,0,0,.25);
}

.cta { text-align: center; padding: 1rem 0 3rem; }
.button {
  display: inline-block; padding: .8rem 1rem; border-radius: .9rem; font-weight: 700;
  background: #16a34a; color: #052e16; text-decoration: none;
}

/* Prose */
.prose { max-width: 760px; margin: 2rem auto; }
.prose h1, .prose h2, .prose h3 { line-height: 1.2; margin: 1.2rem 0 .6rem; }
.prose .meta { color: var(--muted); margin-top: -.6rem; }
.prose p, .prose li { color: #dbeafe; }
.prose a { color: #86efac; }
.prose .callout { padding: 1rem; border-radius: 1rem; background: #0b1220; border: 1px dashed rgba(134,239,172,.5); }

/* Forms */
.contact-form { display: grid; gap: .6rem; max-width: 640px; }
.contact-form input, .contact-form textarea {
  padding: .8rem 1rem; border-radius: .8rem; border: 1px solid rgba(255,255,255,.12);
  background: #0b1220; color: var(--text);
}
.contact-form input:focus, .contact-form textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 4px var(--ring); }
.contact-form button {
  justify-self: start; border: none; border-radius: .8rem; padding: .8rem 1rem; font-weight: 600;
  background: linear-gradient(90deg, var(--accent), var(--accent-2)); color: #052e16; cursor: pointer;
}

/* Cookie switch */
.switch { display: inline-flex; align-items: center; gap: .6rem; cursor: pointer; }
.switch input { display: none; }
.switch .slider {
  width: 42px; height: 24px; background: #334155; border-radius: 999px; position: relative; display: inline-block;
}
.switch .slider::after {
  content: ""; width: 18px; height: 18px; background: white; border-radius: 999px; position: absolute; top: 3px; left: 3px; transition: transform .2s;
}
.switch input:checked + .slider { background: #16a34a; }
.switch input:checked + .slider::after { transform: translateX(18px); }
.switch .label { color: var(--muted); }

/* Footer */
.site-footer { padding: 2rem 0; border-top: 1px solid rgba(255,255,255,.08); margin-top: 3rem; }
.site-footer .small { color: var(--muted); }

/* Responsive nav */
@media (max-width: 900px) {
  .grid.three { grid-template-columns: 1fr; }
  .nav .menu-toggle { display: inline-block; }
  .nav-links { display: none; position: absolute; right: 1rem; top: 56px; background: #0b1220; padding: .6rem; border-radius: .8rem; border: 1px solid rgba(255,255,255,.12); }
  .nav-links.open { display: grid; gap: .6rem; min-width: 220px; }
  .nav .divider { display: none; }
}

/* Accessibility helpers */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}