:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #93c5fd;
  --primary-bg: #eff6ff;
  --surface: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --border-light: rgba(148, 163, 184, 0.24);
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.07);
  --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.08);
  --shadow-btn: 0 8px 20px rgba(37, 99, 235, 0.25);
  --radius-sm: 0.6rem;
  --radius-md: 0.9rem;
  --radius-lg: 1.2rem;
  --radius-pill: 999px;
  --transition: 0.2s ease;
}

body {
  min-height: 100vh;
  margin: 0;
  display: flex;
  align-items: center;
  background: radial-gradient(ellipse at 20% 10%, #dbeafe 0%, #e0f2fe 35%, #f0f9ff 70%, #f8fafc 100%);
  background-attachment: fixed;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text-primary);
}

.container {
  max-width: 1120px;
}

.card {
  border: none;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(2px);
  transition: box-shadow var(--transition);
}

.card:hover {
  box-shadow: 0 16px 48px rgba(15, 23, 42, 0.1);
}

.card-header {
  background: var(--primary-bg);
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.5rem;
}

.card-body {
  padding: 1.75rem;
}

.form-label {
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.form-control {
  border-radius: var(--radius-md);
  border: 1.5px solid var(--border);
  padding: 0.7rem 1rem;
  font-size: 0.95rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow-sm);
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.btn-primary {
  border-radius: var(--radius-pill);
  padding: 0.75rem 2rem;
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border: none;
  box-shadow: var(--shadow-btn);
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(37, 99, 235, 0.3);
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

.table {
  margin-bottom: 0;
  background: var(--surface);
}

.table thead th {
  border-bottom: 2px solid var(--border-light);
  color: var(--text-secondary);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 700;
  padding: 0.9rem 1rem;
}

.table tbody td {
  padding: 0.8rem 1rem;
  vertical-align: middle;
}

.table tbody tr {
  transition: background var(--transition);
}

.table tbody tr:hover {
  background: rgba(37, 99, 235, 0.05);
}

.table-striped > tbody > tr:nth-of-type(odd) {
  background-color: rgba(241, 245, 249, 0.5);
}

.table-striped > tbody > tr:nth-of-type(odd):hover {
  background-color: rgba(37, 99, 235, 0.06);
}

.text-muted {
  color: var(--text-muted) !important;
}

h1.fw-bold {
  font-size: 2rem;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2.h5 {
  color: var(--text-primary);
  font-weight: 700;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.card {
  animation: fadeIn 0.4s ease both;
}

.card + .card {
  animation-delay: 0.1s;
}

@media (max-width: 767px) {
  .card {
    box-shadow: var(--shadow-md);
    border-radius: var(--radius-md);
  }

  .card-body {
    padding: 1.25rem;
  }

  h1.fw-bold {
    font-size: 1.6rem;
  }
}