:root {
  --bg: #0a0a14;
  --bg-elev: #11111d;
  --fg: #e2e8f0;
  --fg-dim: rgba(226, 232, 240, 0.7);
  --accent: #fbbf24;
  --accent-hot: #f97316;
  --border: rgba(251, 191, 36, 0.15);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar-brand {
  font-weight: 800;
  letter-spacing: 2px;
  font-size: 14px;
  color: var(--accent);
  text-transform: uppercase;
}

.topbar-tier {
  font-size: 11px;
  letter-spacing: 1.5px;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--accent);
  text-transform: uppercase;
  background: rgba(251, 191, 36, 0.05);
}

.topbar-install {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex: 1;
  margin: 0 12px;
}

.install-btn {
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 1.2px;
  padding: 5px 12px;
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 4px;
  text-transform: uppercase;
  cursor: pointer;
  font-weight: 700;
  transition: background 120ms ease, color 120ms ease;
}

.install-btn:hover {
  background: var(--accent);
  color: #0a0a14;
}

.install-hint {
  font-size: 11px;
  color: var(--fg-dim);
  letter-spacing: 0.5px;
}

#app {
  flex: 1;
  display: block;
}

.screen {
  padding: 20px;
  max-width: 1000px;
  margin: 0 auto;
}

.screen h1 {
  font-size: 24px;
  margin-bottom: 12px;
  color: var(--accent);
}

.screen p {
  color: var(--fg-dim);
  margin-bottom: 10px;
}

.stub-card {
  border: 1px solid var(--border);
  background: var(--bg-elev);
  padding: 20px;
  border-radius: 8px;
  margin-top: 16px;
}

.stub-note {
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-top: 14px;
}