:root {
  --bg: #f5f7fa;
  --bg-card: #ffffff;
  --bg-input: #f0f2f5;
  --border: #e2e5ea;
  --text: #1a1d27;
  --text-muted: #6b7280;
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-light: #eef2ff;
  --danger: #dc2626;
  --success: #16a34a;
  --warning: #d97706;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

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

/* Layout */
.container { max-width: 1200px; margin: 0 auto; padding: 2rem; }
.header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 1rem 2rem; border-bottom: 1px solid var(--border);
  background: var(--bg-card); box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.header h1 { font-size: 1.2rem; font-weight: 600; color: var(--text); }
.header nav { display: flex; gap: 1.5rem; align-items: center; }
.header nav a { color: var(--text-muted); font-size: 0.9rem; }
.header nav a:hover, .header nav a.active { color: var(--primary); }

/* Cards */
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 8px; padding: 1.5rem; margin-bottom: 1rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.card h2 { font-size: 1.1rem; margin-bottom: 1rem; }

/* Tables */
table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
th { text-align: left; padding: 0.75rem; color: var(--text-muted); border-bottom: 2px solid var(--border); font-weight: 500; }
td { padding: 0.75rem; border-bottom: 1px solid var(--border); }
tr:hover { background: var(--primary-light); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.5rem 1rem; border-radius: 6px; border: none;
  font-size: 0.875rem; cursor: pointer; font-weight: 500;
  transition: all 0.15s;
}
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { opacity: 0.9; }
.btn-sm { padding: 0.3rem 0.6rem; font-size: 0.8rem; }
.btn-outline {
  background: transparent; border: 1px solid var(--border);
  color: var(--text-muted);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }

/* Forms */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.4rem; font-size: 0.85rem; color: var(--text-muted); }
input, select, textarea {
  width: 100%; padding: 0.6rem 0.8rem; border-radius: 6px;
  border: 1px solid var(--border); background: var(--bg-input);
  color: var(--text); font-size: 0.9rem;
}
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
}

/* Tabs */
.tabs {
  display: flex; gap: 0; margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--border);
}
.tab {
  padding: 0.6rem 1.2rem; cursor: pointer; font-size: 0.9rem;
  color: var(--text-muted); border-bottom: 2px solid transparent;
  margin-bottom: -2px; transition: all 0.15s; background: none;
  border-top: none; border-left: none; border-right: none;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 500; }

/* Chips */
.chip {
  display: inline-block; padding: 0.2rem 0.6rem; border-radius: 12px;
  font-size: 0.75rem; font-weight: 500; background: var(--primary-light);
  color: var(--primary); margin: 0.1rem;
}

/* Checkbox grid */
.checkbox-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.5rem; max-height: 300px; overflow-y: auto; padding: 0.5rem;
}
.checkbox-grid label {
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.5rem; border-radius: 6px; cursor: pointer;
  font-size: 0.85rem; border: 1px solid var(--border);
}
.checkbox-grid label:hover { background: var(--primary-light); }
.checkbox-grid input[type="checkbox"] { width: auto; }

/* Modal */
.modal-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,0.3); z-index: 100;
  justify-content: center; align-items: center;
}
.modal-overlay.active { display: flex; }
.modal {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 12px; padding: 2rem; min-width: 400px; max-width: 600px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}
.modal h3 { margin-bottom: 1.5rem; }
.modal-actions { display: flex; gap: 0.75rem; justify-content: flex-end; margin-top: 1.5rem; }

/* Badges */
.badge {
  display: inline-block; padding: 0.15rem 0.5rem; border-radius: 4px;
  font-size: 0.75rem; font-weight: 500;
}
.badge-admin { background: rgba(79, 70, 229, 0.1); color: var(--primary); }
.badge-user { background: rgba(107, 114, 128, 0.1); color: var(--text-muted); }
.badge-read { background: rgba(22, 163, 74, 0.1); color: var(--success); }
.badge-write { background: rgba(217, 119, 6, 0.1); color: var(--warning); }
.badge-success { background: rgba(22, 163, 74, 0.1); color: var(--success); }
.badge-error { background: rgba(220, 38, 38, 0.1); color: var(--danger); }
.badge-mysql { background: rgba(0, 136, 204, 0.1); color: #0088cc; }
.badge-postgresql { background: rgba(51, 103, 145, 0.1); color: #336791; }
.badge-mariadb { background: rgba(0, 136, 204, 0.1); color: #0088cc; }

/* Login */
.login-wrapper {
  display: flex; justify-content: center; align-items: center;
  min-height: 100vh; background: var(--bg);
}
.login-box {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 12px; padding: 2.5rem; width: 400px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}
.login-box h1 { text-align: center; margin-bottom: 0.5rem; font-size: 1.4rem; }
.login-box p { text-align: center; color: var(--text-muted); margin-bottom: 1.5rem; font-size: 0.9rem; }
.login-box .btn { width: 100%; justify-content: center; padding: 0.7rem; }

/* Utility */
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.flex-wrap { flex-wrap: wrap; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.5rem; }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 0.85rem; }
.text-mono { font-family: 'SF Mono', 'Fira Code', monospace; font-size: 0.8rem; }
.hidden { display: none; }
#toast {
  position: fixed; bottom: 2rem; right: 2rem;
  padding: 0.75rem 1.25rem; border-radius: 8px;
  background: var(--bg-card); border: 1px solid var(--border);
  font-size: 0.875rem; z-index: 200; display: none;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
#toast.show { display: block; }
#toast.error { border-color: var(--danger); color: var(--danger); }