:root {
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --border: #e2e8f0;
  --text: #1e293b;
  --muted: #64748b;
  --primary: #2563eb;
  --primary-2: #1d4ed8;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px;
  background: #0f172a;
  color: #e2e8f0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.navbar a {
  color: #e2e8f0;
  text-decoration: none;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: 8px;
  transition: background 0.2s;
}

.navbar a:hover {
  background: rgba(255, 255, 255, 0.08);
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 6px 20px rgba(15, 23, 42, 0.06);
  padding: 20px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 16px;
  border: none;
  border-radius: 10px;
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  transition: transform 0.1s ease, box-shadow 0.2s;
}

.btn:active { transform: translateY(1px); }

.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-2)); color: #fff; }
.btn-secondary { background: #475569; color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }

.input, .select, .textarea {
  width: 100%;
  padding: 10px 12px;
  border: 2px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
  transition: border-color 0.2s, box-shadow 0.2s;
  background: #fff;
}

.input:focus, .select:focus, .textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.table-modern {
  width: 100%;
  border-collapse: collapse;
}

.table-modern th {
  background: #f8fafc;
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.5px;
  color: var(--muted);
  padding: 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.table-modern td {
  padding: 12px;
  border-bottom: 1px solid var(--border);
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 12px;
}

.pill.admin { background: #e0e7ff; color: #1e3a8a; }
.pill.reader { background: #dcfce7; color: #166534; }

.modal-base {
  position: fixed;
  inset: 0;
  display: none;
  justify-content: center;
  align-items: center;
  background: rgba(0, 0, 0, 0.45);
  padding: 16px;
  z-index: 1000;
}

.modal-base.active { display: flex; }

.modal-panel {
  background: #fff;
  border-radius: 14px;
  width: 100%;
  max-width: 800px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 20px;
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.18);
}