feat(usable): package gui-host validation snapshot

Co-Authored-By: Paperclip <noreply@paperclip.ing>

gui/landing.css

@@ -0,0 +1,156 @@
+:root {
+  color-scheme: dark;
+  --bg: #0f1319;
+  --bg-elevated: #151b23;
+  --panel: #171e27;
+  --panel-strong: #202938;
+  --border: #2b3645;
+  --text: #e8edf5;
+  --muted: #9cabbe;
+  --accent: #8bb8ff;
+  --accent-soft: rgba(139, 184, 255, 0.14);
+  --shadow: 0 22px 48px rgba(0, 0, 0, 0.22);
+  --radius: 20px;
+  --radius-sm: 14px;
+  --font: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
+}
+
+* {
+  box-sizing: border-box;
+}
+
+body {
+  margin: 0;
+  min-height: 100vh;
+  background: linear-gradient(180deg, #171e27 0%, var(--bg) 100%);
+  color: var(--text);
+  font-family: var(--font);
+}
+
+.landing-shell {
+  width: min(1180px, calc(100vw - 32px));
+  margin: 0 auto;
+  padding: 32px 0 40px;
+}
+
+.hero,
+.card,
+.footer-card {
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  background: color-mix(in srgb, var(--panel) 92%, white 8%);
+  box-shadow: var(--shadow);
+}
+
+.hero {
+  padding: 32px;
+}
+
+.hero__badge,
+.card__eyebrow {
+  color: var(--muted);
+  font-size: 11px;
+  letter-spacing: 0.1em;
+  text-transform: uppercase;
+}
+
+.hero h1,
+.card h2 {
+  margin: 8px 0 0;
+  letter-spacing: -0.02em;
+}
+
+.hero h1 {
+  font-size: clamp(32px, 5vw, 52px);
+}
+
+.hero__copy,
+.footer-card p,
+.card li,
+.card ol {
+  color: var(--muted);
+  line-height: 1.65;
+}
+
+.hero__copy {
+  max-width: 760px;
+  margin: 16px 0 0;
+  font-size: 15px;
+}
+
+.hero__actions {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 12px;
+  margin-top: 24px;
+}
+
+.primary-link,
+.secondary-link {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  min-height: 44px;
+  padding: 0 16px;
+  border: 1px solid var(--border);
+  border-radius: var(--radius-sm);
+  color: var(--text);
+  text-decoration: none;
+}
+
+.primary-link {
+  border-color: color-mix(in srgb, var(--accent) 42%, var(--border));
+  background: var(--accent-soft);
+}
+
+.secondary-link {
+  background: var(--panel-strong);
+}
+
+.grid {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 16px;
+  margin-top: 16px;
+}
+
+.card {
+  padding: 22px 24px;
+}
+
+.card ul,
+.card ol {
+  margin: 14px 0 0;
+  padding-left: 18px;
+}
+
+.card li + li {
+  margin-top: 8px;
+}
+
+.footer-card {
+  margin-top: 16px;
+  padding: 18px 24px;
+}
+
+code {
+  font-family: "SFMono-Regular", ui-monospace, monospace;
+  font-size: 0.95em;
+}
+
+@media (max-width: 840px) {
+  .landing-shell {
+    width: min(100vw - 24px, 1180px);
+    padding-top: 20px;
+  }
+
+  .hero,
+  .card,
+  .footer-card {
+    border-radius: 18px;
+  }
+
+  .grid {
+    grid-template-columns: 1fr;
+  }
+}