/* web/landing/download.css — LangCity Download Portal — Midnight Cyber Theme */

/* ===== Shared App Theme Tokens ===== */
@import url('../theme.css');

@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root {
  --ink: var(--app-text-primary, #f8fafc);
  --muted: var(--app-text-muted, #94a3b8);
  --line: var(--app-border, #1e293b);
  --panel: var(--app-surface-glass-raised, rgba(19, 29, 56, 0.82));
  --deep: var(--app-bg-deep, #020611);
  --bg: var(--app-bg, #050814);
  --surface: var(--app-surface, #0b1124);
  --surface-raised: var(--app-surface-raised, #131d38);
  --surface-highlight: var(--app-surface-highlight, #1f2e59);
  --primary: var(--app-primary, #00f0ff);
  --primary-bright: var(--app-primary-bright, #38f8ff);
  --primary-glow: var(--app-primary-glow, rgba(0, 240, 255, 0.22));
  --secondary: var(--app-secondary, #818cf8);
  --sakura: var(--app-sakura, #f472b6);
  --mono: 'DM Mono', ui-monospace, monospace;
  --sans: 'Space Grotesk', system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { background: var(--bg); }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: radial-gradient(circle at 82% 8%, rgba(0, 240, 255, 0.08) 0, transparent 35%), var(--bg);
  font-family: var(--sans);
  line-height: 1.5;
}
a { color: inherit; text-decoration: none; }
.page-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .18;
  background-image: linear-gradient(transparent 95%, rgba(0, 240, 255, 0.08) 96%), linear-gradient(90deg, transparent 95%, rgba(0, 240, 255, 0.06) 96%);
  background-size: 28px 28px;
  mask-image: linear-gradient(to bottom, black, transparent 70%);
}
.download-nav, main, .download-footer { position: relative; z-index: 1; max-width: 1180px; margin: 0 auto; padding-left: 28px; padding-right: 28px; }
.download-nav { min-height: 86px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 700; font-size: 1.15rem; }
.brand img { width: 35px; height: 35px; object-fit: cover; border-radius: 7px; }
.brand small { color: var(--muted); font: 400 .65rem var(--mono); margin-left: 4px; }
.play-link, .demo-link { color: var(--primary-bright); font: 500 .75rem var(--mono); letter-spacing: .02em; }
.play-link span, .demo-link span, .note-button span { margin-left: 8px; }
.play-link:hover, .demo-link:hover { color: var(--ink); }
.download-hero { min-height: 500px; display: grid; grid-template-columns: .9fr 1.1fr; gap: 70px; align-items: center; padding: 86px 0 96px; }
.eyebrow { margin: 0 0 15px; color: var(--primary); font: 500 .68rem var(--mono); letter-spacing: .16em; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 24px; font-size: clamp(3.2rem, 7vw, 6.7rem); line-height: .91; letter-spacing: -.08em; font-weight: 600; }
h1 span { color: var(--primary); }
.hero-lead { max-width: 460px; color: var(--muted); font-size: 1.08rem; }
.demo-link { display: inline-block; margin-top: 22px; }
.hero-art { position: relative; min-height: 360px; overflow: hidden; border: 1px solid var(--line); background: var(--surface-raised); box-shadow: 16px 16px 0 rgba(0, 240, 255, 0.06); }
.hero-art img { width: 100%; height: 100%; min-height: 360px; object-fit: cover; filter: saturate(.85) contrast(1.05); opacity: .78; }
.hero-art::after { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(5, 8, 20, 0.05), rgba(5, 8, 20, 0.75)); }
.art-stamp { position: absolute; right: 24px; bottom: 22px; z-index: 1; padding: 13px 12px; color: var(--primary-bright); border: 1px solid var(--primary); font: 500 .65rem/1.15 var(--mono); letter-spacing: .12em; transform: rotate(-7deg); }
.hero-version-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  margin-bottom: 18px;
  border-radius: 999px;
  background: rgba(0, 240, 255, 0.12);
  border: 1px solid rgba(0, 240, 255, 0.35);
  color: var(--primary-bright);
  font: 500 0.75rem var(--mono);
  letter-spacing: 0.04em;
}
.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 8px #34d399;
  animation: pulseDot 2s infinite ease-in-out;
}
@keyframes pulseDot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.6; }
}

.stores-section { padding: 10px 0 50px; }
.store-badges-grid { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 10px; }
.store-badge-card {
  display: inline-block;
  transition: transform 0.2s ease, filter 0.2s ease;
  border-radius: 10px;
}
.store-badge-card:hover {
  transform: translateY(-3px);
  filter: drop-shadow(0 6px 16px rgba(0, 0, 0, 0.6)) drop-shadow(0 0 12px var(--primary-glow));
}
.store-badge-svg {
  width: 175px;
  height: 54px;
  display: block;
  border-radius: 10px;
}

.platforms { padding: 38px 0 90px; border-top: 1px solid var(--line); }
.section-heading { display: flex; align-items: baseline; gap: 22px; flex-wrap: wrap; margin-bottom: 30px; }
.section-heading .eyebrow { width: 100%; margin-bottom: -10px; }
h2 { margin-bottom: 0; font-size: clamp(1.8rem, 4vw, 3.2rem); letter-spacing: -.05em; }
.section-heading > p:last-child { margin: 0; color: var(--muted); }
.platform-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.platform-card { min-height: 220px; display: flex; flex-direction: column; justify-content: space-between; padding: 24px; border: 1px solid var(--line); background: var(--panel); border-radius: 12px; transition: transform .25s, border-color .25s, background .25s, box-shadow .25s; }
.platform-card:hover, .platform-card.recommended { border-color: var(--primary); background: var(--surface-highlight); transform: translateY(-5px); box-shadow: 0 12px 30px rgba(0,0,0,.6), 0 0 20px var(--primary-glow); }
.platform-card.featured { box-shadow: inset 0 3px 0 var(--primary); }

.platform-card-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.platform-icon { color: var(--primary); display: flex; align-items: center; justify-content: center; }
.platform-logo { width: 30px; height: 30px; display: block; }
.platform-badges { display: flex; align-items: center; gap: 6px; }
.version-tag {
  background: rgba(0, 240, 255, 0.15);
  color: var(--primary-bright);
  font: 500 0.65rem var(--mono);
  padding: 3px 7px;
  border-radius: 4px;
  border: 1px solid rgba(0, 240, 255, 0.3);
}
.size-tag {
  background: rgba(255, 255, 255, 0.08);
  color: var(--muted);
  font: 400 0.65rem var(--mono);
  padding: 3px 7px;
  border-radius: 4px;
}

.platform-copy { margin-top: 18px; }
.platform-kicker { color: var(--muted); font: 400 .62rem var(--mono); letter-spacing: .06em; }
.platform-card h3 { margin: 7px 0 4px; font-size: 1.5rem; font-weight: 700; }
.platform-card p { margin: 0; color: var(--muted); font-size: .84rem; line-height: 1.45; }
.platform-card code { color: var(--primary-bright); font: .82rem var(--mono); background: rgba(0,0,0,.4); padding: 1px 4px; border-radius: 3px; }

.platform-card-footer {
  margin-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 12px;
}
.download-action {
  color: var(--ink);
  font: 600 0.78rem var(--mono);
  letter-spacing: 0.02em;
}
.download-arrow { color: var(--primary); font: 1.2rem var(--mono); }
.platform-card:hover .download-arrow { transform: translateY(2px); transition: transform 0.2s; }
.platform-card.unavailable { opacity: .48; cursor: not-allowed; }
.platform-card.unavailable:hover { transform: none; border-color: var(--line); background: var(--panel); box-shadow: none; }

.browser-note { display: flex; align-items: center; gap: 22px; margin: 0 0 90px; padding: 30px; border: 1px solid var(--line); background: var(--panel); border-radius: 12px; }
.note-mark { color: var(--secondary); font-size: 2.5rem; }
.browser-note h2 { font-size: 1.5rem; margin-bottom: 5px; }
.browser-note p:not(.eyebrow) { margin: 0; color: var(--muted); font-size: .9rem; }
.note-button { margin-left: auto; flex: none; padding: 12px 17px; color: var(--app-on-primary, #020914); background: var(--primary); font: 500 .75rem var(--mono); border-radius: 6px; font-weight: 700; transition: background 0.2s, box-shadow 0.2s; }
.note-button:hover { background: var(--primary-bright); box-shadow: 0 0 16px var(--primary-glow); }
.download-footer { display: flex; justify-content: space-between; gap: 20px; padding-top: 25px; padding-bottom: 35px; color: var(--muted); border-top: 1px solid var(--line); font: .7rem var(--mono); }
.footer-links { display: flex; gap: 18px; }
.footer-links a:hover { color: var(--primary-bright); }

@media (max-width: 760px) {
  .download-nav { min-height: 72px; }
  .brand small { display: none; }
  .play-link { font-size: .65rem; }
  .download-hero { display: flex; flex-direction: column; align-items: stretch; gap: 42px; padding: 64px 0 70px; }
  h1 { font-size: clamp(3.4rem, 17vw, 5.5rem); }
  .hero-art, .hero-art img { min-height: 245px; }
  .platform-grid { grid-template-columns: 1fr; }
  .platform-card { min-height: 150px; }
  .browser-note { align-items: flex-start; flex-wrap: wrap; padding: 23px; }
  .browser-note > div:nth-child(2) { flex: 1; min-width: 200px; }
  .note-button { margin-left: 0; }
  .download-footer { flex-direction: column; }
}