/* ZuTech Apps — shared styles */

:root {
  --brand: #14b8a6;
  --brand-dark: #2dd4bf;
  --ink: #f8fafc;
  --ink-soft: rgba(248, 250, 252, 0.78);
  --ink-on-light: #111827;
  --ink-soft-on-light: #4b5563;
  --line: rgba(255, 255, 255, 0.16);
  --bg: #0b1220;
  --bg-soft: rgba(8, 15, 30, 0.55);
  --radius: 14px;
  --maxw: 1080px;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    linear-gradient(rgba(11, 18, 32, 0.85), rgba(11, 18, 32, 0.85)),
    image-set(
      url('/assets/background.webp') type('image/webp'),
      url('/assets/background-optimized.jpg') type('image/jpeg')
    ) center / cover no-repeat fixed;
  color: var(--ink);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: var(--brand); }

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  background:
    linear-gradient(rgba(11, 18, 32, 0.85), rgba(11, 18, 32, 0.85)),
    image-set(
      url('/assets/background.webp') type('image/webp'),
      url('/assets/background-optimized.jpg') type('image/jpeg')
    ) center / cover fixed;
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  min-height: 64px;
}

.brand {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 9px;
}

.brand .mark {
  width: 46px;
  height: 46px;
  flex-shrink: 0;
}

.site-nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.site-nav a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  font-size: 0.95rem;
}

.site-nav a:hover { color: #5eead4; }

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  background:
    linear-gradient(rgba(11, 18, 32, 0.85), rgba(11, 18, 32, 0.85)),
    image-set(
      url('/assets/background.webp') type('image/webp'),
      url('/assets/background-optimized.jpg') type('image/jpeg')
    ) center / cover fixed;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  padding: 88px 0 72px;
  text-align: center;
}

.hero-logo-full {
  display: block;
  width: min(420px, 72vw);
  height: auto;
  margin: 0 auto 36px;
  filter:
    drop-shadow(0 0 3px rgba(255, 255, 255, 0.9))
    drop-shadow(0 0 16px rgba(255, 255, 255, 0.55))
    drop-shadow(0 8px 20px rgba(2, 6, 23, 0.4));
}

.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 6vw, 3rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.hero .tagline {
  margin: 0 auto 10px;
  font-size: clamp(1.05rem, 2.6vw, 1.25rem);
  color: var(--brand);
  font-weight: 600;
}

.hero p.lede {
  margin: 0 auto;
  max-width: 680px;
  font-size: clamp(1.1rem, 2.4vw, 1.35rem);
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.88);
}

.hero .actions {
  margin-top: 26px;
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 11px 20px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
}

.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); }

.btn-ghost { border-color: var(--line); color: var(--ink-on-light); background: #fff; }
.btn-ghost:hover { border-color: var(--brand); color: var(--brand); }

/* Sections */
section { padding: 64px 0; }

section + section { border-top: 1px solid var(--line); }

h2 {
  font-size: clamp(1.5rem, 4vw, 1.9rem);
  letter-spacing: -0.015em;
  margin: 0 0 8px;
}

.section-lede {
  color: var(--ink-soft);
  margin: 0 0 32px;
  max-width: 620px;
}

/* App cards */
.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 22px;
}

.app-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  background: var(--bg-soft);
  color: var(--ink);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.app-card .icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  object-fit: cover;
}

.app-card h3 { margin: 0; font-size: 1.15rem; }

.app-card .category {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  font-weight: 600;
}

.app-card p { margin: 0; color: var(--ink-soft); font-size: 0.95rem; }

.app-card .card-links {
  margin-top: auto;
  padding-top: 8px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.app-card .policy-link { font-size: 0.9rem; }

/* About */
.about p { max-width: 680px; color: var(--ink-soft); }

/* Legal / prose pages */
.prose { max-width: 720px; padding: 56px 0 72px; }
.prose h1 { font-size: clamp(1.8rem, 5vw, 2.3rem); margin: 0 0 6px; letter-spacing: -0.02em; }
.prose h2 { font-size: 1.2rem; margin: 36px 0 8px; }
.prose h3 { font-size: 1.02rem; margin: 24px 0 6px; }
.prose p, .prose li { color: var(--ink-soft); }
.prose ul { padding-left: 20px; }
.prose li { margin-bottom: 6px; }
.updated { font-size: 0.9rem; color: var(--ink-soft); margin: 0 0 8px; }

.callout {
  border: 1px solid var(--line);
  border-left: 3px solid var(--brand);
  background: var(--bg-soft);
  border-radius: 8px;
  padding: 14px 16px;
  margin: 24px 0;
  font-size: 0.93rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--bg-soft);
  padding: 32px 0;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.site-footer nav { display: flex; gap: 18px; flex-wrap: wrap; }
.site-footer a { color: var(--ink-soft); text-decoration: none; }
.site-footer a:hover { color: var(--brand); }

/* Utility */
.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;
}

.skip-link {
  position: absolute;
  left: -9999px;
}
.skip-link:focus {
  left: 12px;
  top: 12px;
  z-index: 20;
  background: #fff;
  color: var(--ink-on-light);
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--brand);
}

:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }