/* Noctilucent Systems — night-shining theme */
:root {
  --bg: #0a0f1e;
  --bg-raise: #101828;
  --surface: #141d31;
  --line: #24304a;
  --text: #dbe4f2;
  --muted: #8fa0b8;
  --accent: #5eb9ff;
  --accent-2: #a78bfa;
  --glow: rgba(94, 185, 255, .35);
  --radius: 12px;
  --font: "Segoe UI Variable Display", "Segoe UI", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  color: var(--text);
  background:
    radial-gradient(1100px 500px at 75% -10%, rgba(94, 185, 255, .10), transparent 60%),
    radial-gradient(900px 420px at 15% 0%, rgba(167, 139, 250, .08), transparent 55%),
    var(--bg);
  background-attachment: fixed;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.2; font-weight: 650; letter-spacing: -.01em; }
img { max-width: 100%; }

.container { max-width: 1060px; margin: 0 auto; padding: 0 20px; }
.skip-link { position: absolute; left: -9999px; top: 0; background: var(--surface); padding: .5rem 1rem; z-index: 99; }
.skip-link:focus { left: 8px; top: 8px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; gap: 1rem; height: 64px; }
.brand { display: flex; align-items: center; gap: .55rem; color: var(--text); font-size: 1.05rem; }
.brand:hover { text-decoration: none; }
.brand-mark { width: 30px; height: 30px; }
.brand-text b { font-weight: 700; color: var(--accent); }
.nav-links { display: flex; gap: .25rem; list-style: none; margin: 0 0 0 auto; padding: 0; }
.nav-links a {
  display: block; padding: .45rem .85rem; border-radius: 8px;
  color: var(--muted); font-weight: 500;
}
.nav-links a:hover { color: var(--text); background: var(--bg-raise); text-decoration: none; }
.nav-links a[aria-current="page"] { color: var(--text); background: var(--bg-raise); }
.nav-toggle { display: none; margin-left: auto; background: none; border: 0; color: var(--text); padding: .5rem; cursor: pointer; }

/* Hero */
.hero { padding: 6.5rem 0 4rem; text-align: center; position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(2px 2px at 12% 30%, #cfeaff 50%, transparent 51%),
    radial-gradient(1.5px 1.5px at 28% 15%, #9fdcff 50%, transparent 51%),
    radial-gradient(2px 2px at 45% 38%, #cfeaff 50%, transparent 51%),
    radial-gradient(1.5px 1.5px at 63% 12%, #e6d9ff 50%, transparent 51%),
    radial-gradient(2px 2px at 78% 28%, #9fdcff 50%, transparent 51%),
    radial-gradient(1.5px 1.5px at 90% 45%, #cfeaff 50%, transparent 51%);
  opacity: .5;
}
.hero-inner { max-width: 720px; margin: 0 auto; padding: 0 20px; position: relative; }
.hero-kicker {
  text-transform: uppercase; letter-spacing: .35em; font-size: .8rem;
  color: var(--accent); margin-bottom: 1rem;
}
.hero h1 {
  font-size: clamp(2.1rem, 5.5vw, 3.4rem); margin: 0 0 1rem;
  background: linear-gradient(120deg, #eaf4ff 30%, var(--accent) 70%, var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { color: var(--muted); font-size: 1.15rem; max-width: 34em; margin: 0 auto 2rem; }
.hero-actions { display: flex; gap: .8rem; justify-content: center; flex-wrap: wrap; }

/* Buttons */
.btn {
  display: inline-block; padding: .7rem 1.5rem; border-radius: 10px;
  font-weight: 600; border: 1px solid transparent; cursor: pointer; font-size: 1rem;
}
.btn:hover { text-decoration: none; }
.btn-primary {
  background: linear-gradient(120deg, var(--accent), #7ba7ff);
  color: #061120; box-shadow: 0 0 24px var(--glow);
}
.btn-primary:hover { filter: brightness(1.1); }
.btn-ghost { border-color: var(--line); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); background: var(--bg-raise); }

/* Sections & prose */
section { padding: 2.5rem 0; }
.prose { max-width: 720px; margin: 0 auto; padding: 2.5rem 20px; }
.prose h1 { font-size: 2.2rem; }
.prose h2 { margin-top: 2.2rem; font-size: 1.45rem; }
.prose h3 { margin-top: 1.6rem; font-size: 1.15rem; }
.prose pre {
  background: var(--bg-raise); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1rem; overflow-x: auto; font-size: .9rem;
}
.signature { margin-top: 2.5rem; font-weight: 600; }
.signature span { color: var(--muted); font-weight: 400; font-size: .95rem; }

.page-head { text-align: center; padding: 4rem 20px 1rem; }
.page-head h1 { font-size: clamp(2rem, 4.5vw, 2.8rem); margin: 0 0 .6rem; }
.page-head p { color: var(--muted); max-width: 40em; margin: 0 auto; }

/* Cards */
.card-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 1.2rem; padding: 1.5rem 0 3rem;
}
.card {
  background: linear-gradient(180deg, var(--surface), var(--bg-raise));
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.6rem; display: flex; flex-direction: column; gap: .6rem;
  transition: border-color .2s, transform .2s, box-shadow .2s;
}
.card:hover { border-color: var(--accent); transform: translateY(-3px); box-shadow: 0 8px 32px rgba(0,0,0,.35), 0 0 20px rgba(94,185,255,.12); }
.card h2, .card h3 { margin: 0; font-size: 1.3rem; }
.card .tagline { color: var(--accent); font-size: .95rem; margin: 0; }
.card .summary { color: var(--muted); font-size: .95rem; margin: 0; flex: 1; }
.card .card-link { font-weight: 600; }
.badge {
  align-self: flex-start; font-size: .72rem; text-transform: uppercase; letter-spacing: .08em;
  padding: .2rem .6rem; border-radius: 99px; font-weight: 700;
  background: rgba(94, 185, 255, .15); color: var(--accent); border: 1px solid rgba(94,185,255,.35);
}

/* Story list */
.story-list { max-width: 720px; margin: 0 auto; padding: 1rem 20px 3rem; display: grid; gap: 1.2rem; }
.story-card { padding: 1.4rem 1.6rem; }
.story-date { color: var(--muted); font-size: .85rem; margin: 0; }
.story-meta { color: var(--muted); font-size: .9rem; }

/* Pricing / purchase */
.sku-group { max-width: 900px; margin: 0 auto; padding: 1rem 20px 2rem; }
.sku-group > h2 { font-size: 1.5rem; border-bottom: 1px solid var(--line); padding-bottom: .6rem; }
.sku-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 1.2rem; margin-top: 1.2rem; }
.sku { text-align: center; align-items: center; }
.sku .price { font-size: 1.9rem; font-weight: 700; margin: .2rem 0 0; }
.sku .per { color: var(--muted); font-size: .85rem; margin: 0 0 .8rem; }
.purchase-note { max-width: 720px; margin: 0 auto; padding: 0 20px 3rem; color: var(--muted); font-size: .95rem; }

/* Product page */
.product-downloads { display: flex; gap: .8rem; flex-wrap: wrap; margin: 1.5rem 0; }
.draft-note {
  max-width: 720px; margin: 1rem auto; padding: .8rem 1.2rem;
  border: 1px dashed var(--accent-2); border-radius: var(--radius);
  color: var(--accent-2); font-size: .9rem;
}

/* Contact form */
.contact-form-wrap { max-width: 560px; margin: 0 auto; padding: 0 20px 4rem; }
.contact-form { display: grid; gap: 1rem; }
.contact-form label { display: grid; gap: .35rem; font-weight: 600; font-size: .95rem; }
.contact-form input, .contact-form textarea {
  font: inherit; color: var(--text); background: var(--bg-raise);
  border: 1px solid var(--line); border-radius: 8px; padding: .65rem .8rem;
}
.contact-form input:focus, .contact-form textarea:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(94,185,255,.18);
}
.contact-form .hp { position: absolute; left: -9999px; }
.contact-status { min-height: 1.4em; margin: 0; font-size: .95rem; }
.contact-status.ok { color: #7de0a6; }
.contact-status.err { color: #ff9d9d; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); margin-top: 3rem; padding: 2.5rem 0 1.5rem; background: rgba(8, 12, 24, .6); }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.5rem; }
.footer-brand { font-weight: 700; margin: 0 0 .3rem; }
.footer-head { font-weight: 600; color: var(--muted); text-transform: uppercase; font-size: .78rem; letter-spacing: .1em; margin: 0 0 .3rem; }
.footer-muted { color: var(--muted); margin: 0; font-size: .95rem; }
.footer-legal { margin-top: 2rem; padding-top: 1.2rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .85rem; }
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--text); }

/* Mobile */
@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none; position: absolute; top: 64px; left: 0; right: 0;
    flex-direction: column; background: var(--bg-raise);
    border-bottom: 1px solid var(--line); padding: .5rem 1rem 1rem;
  }
  .nav-links.open { display: flex; }
  .hero { padding-top: 4.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .card, .card:hover { transition: none; transform: none; }
}