:root {
  --bg: #f4f5f7;
  --card-bg: #ffffff;
  --text: #1c1e21;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --primary: #2563eb;
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14161a;
    --card-bg: #1e2126;
    --text: #f0f1f3;
    --text-muted: #9aa0ab;
    --border: #2c3036;
    --primary: #5b8def;
  }
}

:root[data-theme="dark"] {
  --bg: #14161a;
  --card-bg: #1e2126;
  --text: #f0f1f3;
  --text-muted: #9aa0ab;
  --border: #2c3036;
  --primary: #5b8def;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.page {
  max-width: 560px;
  margin: 0 auto;
  padding: 32px 16px 48px;
}

.header {
  text-align: center;
  margin-bottom: 28px;
}

.header h1 {
  font-size: 1.8rem;
  margin: 0 0 6px;
}

.subtitle {
  color: var(--text-muted);
  margin: 0;
  font-size: 0.95rem;
}

.tool-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.tool-list li {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.tool-list a {
  display: block;
  padding: 14px 18px;
  text-decoration: none;
  color: inherit;
  font-weight: 600;
  font-size: 1rem;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.tool-list a:hover {
  color: var(--primary);
}

.section-title {
  font-size: 1.15rem;
  margin: 32px 0 12px;
}

.footer {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-top: 28px;
}