/* Aito-branded landing page. Self-contained — no CDN deps, no JS frameworks. */

:root {
  --bg-deep: #0c0f41;
  --bg-card: #121830;
  --bg-card-hover: #1a2244;
  --border: #2a3258;
  --text: #e8eaff;
  --text-muted: #9ba0c5;
  --accent: #7c5cfc;
  --accent-hot: #9b7dff;
  --vertical-bg: #2a1e5a;
  --vertical-text: #b9a8ff;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg-deep);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--accent-hot); text-decoration: none; }
a:hover { text-decoration: underline; }

.shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 32px 24px 80px;
}

header.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.wordmark {
  font-weight: 700;
  font-size: 24px;
  letter-spacing: -0.02em;
  color: var(--text);
}
.wordmark .dot { color: var(--accent-hot); }
.top-links a {
  margin-left: 24px;
  color: var(--text-muted);
  font-size: 14px;
}
.top-links a:hover { color: var(--text); }

.hero {
  padding: 64px 0 48px;
  text-align: center;
}
.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 700;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #ffffff 0%, #b9a8ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p {
  margin: 0;
  font-size: clamp(16px, 2vw, 20px);
  color: var(--text-muted);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 16px;
}
@media (max-width: 720px) {
  .grid { grid-template-columns: 1fr; }
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 120ms ease, background 120ms ease, border-color 120ms ease;
}
.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.card .thumb {
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #1a2244 0%, #2a1e5a 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-hot);
  font-size: 48px;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.card .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.card .body {
  padding: 20px 22px 22px;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 10px;
}
.vertical {
  display: inline-block;
  align-self: flex-start;
  background: var(--vertical-bg);
  color: var(--vertical-text);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 100px;
}
.card h3 {
  margin: 4px 0 0;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.card .tagline {
  color: var(--accent-hot);
  font-size: 14px;
  font-weight: 500;
  margin: 0;
}
.card .one-liner {
  color: var(--text-muted);
  font-size: 14px;
  margin: 0;
  flex: 1;
}
.card .open-btn {
  margin-top: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--accent);
  color: white;
  font-weight: 600;
  font-size: 14px;
  border-radius: 8px;
  align-self: flex-start;
  transition: background 120ms ease;
}
.card .open-btn:hover {
  background: var(--accent-hot);
  text-decoration: none;
}
.card .open-btn::after { content: "→"; }

footer {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 13px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
footer .left a { margin-right: 20px; color: var(--text-muted); }
footer .left a:hover { color: var(--text); }
footer .built {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 12px;
  opacity: 0.7;
}