:root {
  --bg: #f6f8fb;
  --card: #ffffff;
  --text: #111827;
  --muted: rgba(17, 24, 39, 0.65);
  --border: rgba(17, 24, 39, 0.10);
  --brand: #1f2937;
  --accent: #d21924;
  --blue: #0b5fff;
  --radius: 12px;
  --shadow: 0 18px 40px rgba(0,0,0,0.08);
  --mono: ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
}

a { color: inherit; text-decoration: none; }
.muted { color: var(--muted); }
.mono { font-family: var(--mono); }

header {
  height: 54px;
  background: var(--brand);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(255,255,255,0.10);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand .dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(210,25,36,0.18);
}
.brand h1 {
  font-size: 0.98rem;
  margin: 0;
  letter-spacing: -0.01em;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.18);
  background: rgba(255,255,255,0.08);
  font-weight: 800;
  font-size: 0.75rem;
}

.wrap { max-width: 1100px; margin: 0 auto; padding: 18px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: none;
}

.btn {
  appearance: none;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  padding: 10px 14px;
  border-radius: 999px;
  font-weight: 900;
  cursor: pointer;
}
.btn:hover { background: #f8fafc; }

header .btn {
  border: 1px solid rgba(255,255,255,0.18);
  background: rgba(255,255,255,0.08);
  color: #fff;
}
header .btn:hover { background: rgba(255,255,255,0.14); }

.btn-solid {
  border: none;
  background: var(--blue);
  color: #fff;
}
.btn-solid:hover { background: #0747b7; }