:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --border: #e3e6ec;
  --text: #1a1f2c;
  --muted: #6b7280;
  --accent: #00897b;
  --accent-dark: #00695c;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 4px 12px rgba(0, 0, 0, 0.04);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 32px 0 24px;
}

.site-header h1 {
  margin: 0;
  font-size: 28px;
  letter-spacing: -0.01em;
}

.subtitle {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 14px;
}

main {
  padding: 32px 0 64px;
}

.tool-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
}

.tool-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: transform 0.08s ease, box-shadow 0.12s ease, border-color 0.12s ease;
  box-shadow: var(--shadow);
}

.tool-card:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
}

.tool-card h2 {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
}

.tool-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.tool-card .meta {
  margin-top: 8px;
  font-size: 12px;
  color: var(--muted);
  display: flex;
  gap: 12px;
}

.tool-card .badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  background: rgba(0, 137, 123, 0.1);
  color: var(--accent-dark);
}

.tool-card .badge.inactive {
  background: rgba(107, 114, 128, 0.12);
  color: var(--muted);
}

.loading, .empty {
  color: var(--muted);
  font-style: italic;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 16px 0;
  color: var(--muted);
}