:root {
  --bg: #0b0e14;
  --bg-card: #151b26;
  --text: #e6edf3;
  --text-dim: #8b949e;
  --accent: #d4af37;
  --accent-hover: #e8c860;
  --border: #232b3a;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
.container { max-width: 1000px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
  position: sticky; top: 0;
  background: rgba(11,14,20,0.9);
  backdrop-filter: blur(8px);
  z-index: 10;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; }
.logo img { height: 34px; display: block; }
.main-nav a {
  color: var(--text-dim); text-decoration: none;
  margin-left: 24px; font-size: 14px; font-weight: 500;
  transition: color 0.2s;
}
.main-nav a:hover { color: var(--accent); }

/* Hero */
.hero { text-align: center; padding: 56px 0 40px; }
.hero h1 { font-size: 2.2rem; margin-bottom: 12px; }
.hero p { color: var(--text-dim); font-size: 1.05rem; }

/* Tool cards grid */
.tool-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  padding: 20px 0 60px;
}
.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  text-decoration: none;
  color: var(--text);
  transition: transform 0.2s, border-color 0.2s;
}
.tool-card:hover { transform: translateY(-3px); border-color: var(--accent); }
.tool-card h3 { font-size: 1.05rem; margin-bottom: 6px; color: var(--accent); }
.tool-card p { font-size: 0.9rem; color: var(--text-dim); }

/* Tool page */
main { min-height: 60vh; padding: 40px 0; }
.tool-page h1 { color: var(--accent); margin-bottom: 20px; font-size: 1.8rem; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  text-align: center;
  color: var(--text-dim);
  font-size: 13px;
}