:root {
  --bg: #070b12;
  --bg-alt: #0e1520;
  --text: #e8eef7;
  --muted: #8fa3bc;
  --accent: #52d6ff;
  --accent-2: #7b9cff;
  --sun: #ffd86b;
  --rain: #4da3ff;
  --snow: #e8f4ff;
  --radius: 16px;
  --font: "Exo 2", system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container { width: min(1120px, 92vw); margin-inline: auto; }
a { color: var(--accent); }
a:hover { color: #9ae8ff; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: #000; padding: .5rem 1rem; z-index: 999;
}
.skip-link:focus { left: 1rem; top: 1rem; }

.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(7, 11, 18, .85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.nav { display: flex; align-items: center; justify-content: space-between; padding: 1rem 0; }
.logo { font-weight: 700; font-size: 1.25rem; color: var(--text); text-decoration: none; }
.logo-accent { color: var(--accent); }
.nav-menu { display: flex; gap: 1.5rem; list-style: none; margin: 0; padding: 0; }
.nav-menu a { color: var(--muted); text-decoration: none; font-size: .95rem; }
.nav-menu a:hover { color: var(--text); }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: .5rem; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--text); margin: 5px 0; }

.hero {
  position: relative; overflow: hidden;
  padding: 5rem 0 4rem; min-height: 85vh;
  display: flex; align-items: center;
}
.hero-glow {
  position: absolute; inset: -20%;
  background: radial-gradient(circle at 50% 40%, rgba(82,214,255,.12), transparent 55%);
}
.hero-ring {
  position: absolute; width: min(520px, 90vw); aspect-ratio: 1;
  left: 50%; top: 45%; transform: translate(-50%, -50%);
  border-radius: 50%; opacity: .35;
}
.ring-temp {
  position: absolute; inset: 18%;
  border: 24px solid transparent;
  border-top-color: var(--sun); border-right-color: #b8c4d4;
  border-radius: 50%; transform: rotate(-30deg);
}
.ring-precip {
  position: absolute; inset: 8%;
  border: 8px solid var(--rain); border-radius: 50%;
  border-bottom-color: transparent; border-left-color: transparent;
}
.hero-moon {
  position: absolute; width: 48px; height: 48px; border-radius: 50%;
  background: linear-gradient(90deg, #ccc 50%, #333 50%);
  top: 22%; right: 18%; opacity: .5;
}
.hero-content { position: relative; z-index: 1; max-width: 640px; }
.eyebrow { color: var(--accent); font-size: .85rem; text-transform: uppercase; letter-spacing: .12em; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.25rem); line-height: 1.15; margin: .5rem 0 1rem; }
.hero-lead { font-size: 1.15rem; color: var(--muted); max-width: 52ch; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 1rem; margin: 2rem 0 1rem; }
.hero-note { font-size: .9rem; color: var(--muted); }

.btn {
  display: inline-block; padding: .85rem 1.5rem; border-radius: 999px;
  font-weight: 600; text-decoration: none; transition: transform .2s, box-shadow .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #041018; }
.btn-secondary { background: transparent; color: var(--text); border: 1px solid rgba(255,255,255,.25); }
.btn-block { display: block; text-align: center; width: 100%; }

.section { padding: 4.5rem 0; }
.section-alt { background: var(--bg-alt); }
.section-intro { color: var(--muted); max-width: 60ch; margin-bottom: 2.5rem; }
h2 { font-size: clamp(1.75rem, 3vw, 2.25rem); margin-bottom: 1rem; }

.feature-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 1.25rem;
}
.feature-card {
  background: rgba(255,255,255,.03); border: 1px solid rgba(255,255,255,.06);
  border-radius: var(--radius); padding: 1.5rem;
}
.feature-card h3 { margin: 0 0 .5rem; font-size: 1.05rem; color: var(--accent); }
.feature-card p { margin: 0; color: var(--muted); font-size: .95rem; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }
.screenshot-placeholder {
  aspect-ratio: 1; border-radius: 50%; border: 2px dashed rgba(255,255,255,.15);
  display: grid; place-items: center; text-align: center; color: var(--muted); font-size: .9rem;
}
.halo-steps { padding-left: 1.25rem; }
.halo-steps li { margin-bottom: .75rem; }
.setup-steps { padding-left: 1.25rem; max-width: 65ch; }
.setup-steps li { margin-bottom: 1.25rem; }

.section-cta { background: linear-gradient(180deg, var(--bg-alt), var(--bg)); }
.download-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.5rem; }
.download-card {
  background: rgba(255,255,255,.04); border-radius: var(--radius); padding: 2rem;
  border: 1px solid rgba(82,214,255,.15);
}

.faq details { border-bottom: 1px solid rgba(255,255,255,.08); padding: 1rem 0; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq p { color: var(--muted); margin: .5rem 0 0; }

.site-footer { padding: 2rem 0; border-top: 1px solid rgba(255,255,255,.06); text-align: center; color: var(--muted); font-size: .9rem; }
.footer-inner p { margin: .35rem 0; }

@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav-menu {
    position: fixed; inset: 60px 0 auto 0; background: var(--bg-alt);
    flex-direction: column; padding: 1.5rem; gap: 1rem;
    transform: translateY(-120%); transition: transform .3s;
    border-bottom: 1px solid rgba(255,255,255,.08);
  }
  .nav-menu.is-open { transform: translateY(0); }
  .split { grid-template-columns: 1fr; }
  .hero-ring { opacity: .2; }
}