/* Root Variables */
:root {
  --primary-color: #024187;
  --primary-light: #0d6efd;
  --success-color: #198754;
  --danger-color: #dc3545;
  --warning-color: #ffc107;
  --info-color: #0dcaf0;
  --bg-gradient: linear-gradient(135deg, #024187 0%, #0d6efd 100%);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
  --border-radius: 12px;
  --transition: all 0.3s ease;
}

/* Body & Container */
body {
  background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 100%);
  color: #2c3e50;
  font-family: "Inter", "Segoe UI", -apple-system, BlinkMacSystemFont, Arial, sans-serif;
  min-height: 100vh;
  padding: 20px 0;
}

.container {
  background: #ffffff;
  padding: 40px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  max-width: 1200px;
  margin: 0 auto;
}

/* Logo Section */
.logo-box {
  background: var(--bg-gradient);
  border-radius: var(--border-radius);
  padding: 30px;
  margin: -40px -40px 30px -40px;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

.logo-box::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  animation: pulse 15s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 0.3; }
}

.logo-image {
  max-width: 280px;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
  transition: var(--transition);
  position: relative;
  z-index: 1;
}

.logo-image:hover {
  transform: scale(1.05);
}

/* Typography */
h1 {
  color: var(--primary-color);
  font-weight: 700;
  letter-spacing: -0.5px;
}

h1 i {
  color: var(--primary-light);
}

/* Alerts */
.alert-modern {
  border: none;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  padding: 16px 24px;
  backdrop-filter: blur(10px);
}

.alert-warning {
  background: linear-gradient(135deg, #fff3cd 0%, #ffe69c 100%);
  border-left: 4px solid var(--warning-color);
}

.alert-info {
  background: linear-gradient(135deg, #cff4fc 0%, #9eeaf9 100%);
  border-left: 4px solid var(--info-color);
}

/* Cards */
.card-modern {
  border: none;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  overflow: hidden;
}

.card-modern:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-header {
  border-bottom: 2px solid #e9ecef;
  padding: 20px 24px;
  font-weight: 600;
}

.bg-gradient {
  background: var(--bg-gradient);
  color: white;
}

.card-body {
  padding: 24px;
}

/* Input Group */
.input-group-modern {
  box-shadow: var(--shadow-sm);
  border-radius: var(--border-radius);
  overflow: hidden;
}

.input-group-modern .input-group-text {
  background: var(--bg-gradient);
  border: none;
  color: white;
  padding: 12px 16px;
}

.input-group-modern .form-control {
  border: 2px solid #e9ecef;
  border-left: none;
  border-right: none;
  padding: 12px 16px;
  font-size: 15px;
  transition: var(--transition);
}

.input-group-modern .form-control:focus {
  border-color: var(--primary-light);
  box-shadow: none;
  background-color: #f8f9fa;
}

.input-group-modern .btn {
  border: none;
  padding: 12px 24px;
  font-weight: 600;
  transition: var(--transition);
}

/* Buttons */
.btn-modern {
  border: none;
  border-radius: var(--border-radius);
  padding: 14px 28px;
  font-weight: 600;
  font-size: 15px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  text-transform: none;
}

.btn-modern:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-modern:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--bg-gradient);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #023570 0%, #0b5ed7 100%);
}

.btn-success {
  background: linear-gradient(135deg, #198754 0%, #20c997 100%);
}

.btn-success:hover {
  background: linear-gradient(135deg, #157347 0%, #1ba87f 100%);
}

.btn-danger {
  background: linear-gradient(135deg, #dc3545 0%, #e85563 100%);
}

.btn-danger:hover {
  background: linear-gradient(135deg, #bb2d3b 0%, #d33947 100%);
}

/* Table */
.table-modern {
  font-size: 14px;
}

.table-modern thead {
  background: var(--bg-gradient);
  color: white;
}

.table-modern thead th {
  border: none;
  padding: 16px;
  font-weight: 600;
  text-transform: uppercase;
  font-size: 13px;
  letter-spacing: 0.5px;
}

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

.table-modern tbody tr:hover {
  background-color: #f8f9fa;
  transform: scale(1.01);
}

.table-modern tbody td {
  padding: 16px;
  vertical-align: middle;
  border-bottom: 1px solid #e9ecef;
}

.table-modern tbody tr:last-child td {
  border-bottom: none;
}

/* Form Labels */
.form-label {
  color: #495057;
  font-size: 15px;
  margin-bottom: 12px;
}

/* Responsive */
@media (max-width: 768px) {
  .container {
    padding: 20px;
    border-radius: 8px;
  }

  .logo-box {
    margin: -20px -20px 20px -20px;
    padding: 20px;
  }

  .logo-image {
    max-width: 200px;
  }

  h1 {
    font-size: 1.75rem;
  }

  .btn-modern {
    padding: 12px 20px;
    font-size: 14px;
  }

  .table-modern {
    font-size: 12px;
  }

  .table-modern thead th,
  .table-modern tbody td {
    padding: 12px 8px;
  }
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.container > * {
  animation: fadeIn 0.6s ease-out backwards;
}

.container > *:nth-child(1) { animation-delay: 0.1s; }
.container > *:nth-child(2) { animation-delay: 0.2s; }
.container > *:nth-child(3) { animation-delay: 0.3s; }
.container > *:nth-child(4) { animation-delay: 0.4s; }
.container > *:nth-child(5) { animation-delay: 0.5s; }