:root {
  color-scheme: light;
  --bg: #fafafa;
  --panel: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --border: #e5e7eb;
  --primary: #2563eb;
  --primary-ink: #ffffff;
  --maxw: 1040px;
  --radius: 8px;
  --shadow: 0 1px 0 rgba(17, 24, 39, 0.04);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji",
    "Segoe UI Emoji";
  line-height: 1.4;
  color: var(--text);
  background: var(--bg);
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 20px 16px 40px;
}

.topbar {
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}

.topbar-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand {
  font-weight: 700;
  letter-spacing: 0;
  color: var(--text);
}

.nav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav a {
  color: var(--muted);
  font-weight: 600;
}

.nav a[aria-current="page"] {
  color: var(--text);
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero {
  padding: 18px 16px;
  margin: 18px 0 14px;
}

.hero h1 {
  margin: 0 0 6px;
  font-size: 26px;
  line-height: 1.15;
}

.hero p {
  margin: 0;
  color: var(--muted);
}

.footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  padding: 18px 16px;
  font-size: 14px;
}

.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: space-between;
}

.footer nav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  border-radius: 8px;
  padding: 10px 12px;
  font-weight: 700;
  cursor: pointer;
}

.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--primary-ink);
}

.input {
  width: 100%;
  padding: 12px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 16px;
}

.muted {
  color: var(--muted);
}