/* Custom CSS for CSV Data Processor */

/* Root variables for consistent theming */
:root {
  --primary-color: #0d6efd;
  --success-color: #198754;
  --warning-color: #ffc107;
  --danger-color: #dc3545;
  --light-bg: #f8f9fa;
  --border-radius: 0.5rem;
  --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  --shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
  --transition: all 0.3s ease;
}

/* Body and general styling */
body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  min-height: 100vh;
}

/* Header styling */
h1 {
  color: var(--primary-color) !important;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.display-5 {
  font-weight: 700;
}

/* Card enhancements */
.card {
  border-radius: var(--border-radius);
  transition: var(--transition);
}

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

.card-body {
  border-radius: var(--border-radius);
}

/* Form styling enhancements */
.form-control {
  border-radius: var(--border-radius);
  border: 2px solid #e9ecef;
  transition: var(--transition);
  font-size: 0.95rem;
}

.form-control:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
  transform: scale(1.02);
}

.form-label {
  color: #495057;
  margin-bottom: 0.75rem;
  font-size: 1rem;
}

.form-text {
  font-size: 0.875rem;
  color: #6c757d;
}

/* Validation styling */
.form-control.is-invalid {
  border-color: var(--danger-color);
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%23dc3545' viewBox='0 0 12 12'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath d='m5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23dc3545' stroke='none'/%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right calc(0.375em + 0.1875rem) center;
  background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
}

.form-control.is-invalid:focus {
  border-color: var(--danger-color);
  box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}

.invalid-feedback {
  width: 100%;
  margin-top: 0.25rem;
  font-size: 0.875rem;
  color: var(--danger-color);
  display: block;
}

/* File input styling */
.input-group {
  border-radius: var(--border-radius);
  overflow: hidden;
}

.input-group-text {
  background: var(--primary-color);
  color: white;
  border: 2px solid var(--primary-color);
  transition: var(--transition);
}

.input-group:hover .input-group-text {
  background: #0b5ed7;
  border-color: #0b5ed7;
}

/* Radio button enhancements */
.form-check {
  padding: 1rem;
  border: 2px solid #e9ecef;
  border-radius: var(--border-radius);
  transition: var(--transition);
  background: white;
  margin-bottom: 0.5rem;
}

.form-check:hover {
  border-color: var(--primary-color);
  background: #f8f9ff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.form-check-input:checked {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
}

.form-check-input:checked ~ .form-check-label {
  color: var(--primary-color);
}

.form-check-label {
  cursor: pointer;
  transition: var(--transition);
  width: 100%;
}

.form-check-label strong {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 1rem;
}

.form-check-label small {
  font-size: 0.825rem;
  line-height: 1.3;
}

/* Button styling */
.btn {
  border-radius: var(--border-radius);
  font-weight: 600;
  transition: var(--transition);
  border-width: 2px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color) 0%, #0b5ed7 100%);
  border: none;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, #0b5ed7 0%, #0a58ca 100%);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.btn-primary:disabled {
  background: #6c757d;
  opacity: 0.65;
  transform: none;
}

.btn-lg {
  padding: 0.75rem 1.5rem;
  font-size: 1.1rem;
}

/* Alert enhancements */
.alert {
  border-radius: var(--border-radius);
  border: none;
  box-shadow: var(--shadow-sm);
}

.alert-info {
  background: linear-gradient(135deg, #d1ecf1 0%, #bee5eb 100%);
  color: #0c5460;
}

.alert-danger {
  background: linear-gradient(135deg, #f8d7da 0%, #f5c6cb 100%);
  color: #721c24;
}

/* Table styling */
.table {
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.table thead th {
  background: var(--primary-color);
  color: white;
  border: none;
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.875rem;
  letter-spacing: 0.5px;
}

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

.table tbody tr:hover {
  background-color: #f8f9ff;
}

.table-warning {
  background-color: #fff3cd !important;
  color: #664d03 !important;
  font-weight: 600;
}

.table-responsive {
  border-radius: var(--border-radius);
}

/* Status cards */
.bg-primary {
  background: linear-gradient(
    135deg,
    var(--primary-color) 0%,
    #0b5ed7 100%
  ) !important;
}

.bg-success {
  background: linear-gradient(
    135deg,
    var(--success-color) 0%,
    #157347 100%
  ) !important;
}

/* Animation for spinner */
.spinner-border-sm {
  width: 1rem;
  height: 1rem;
}

/* Icon styling */
.bi {
  font-size: 1rem;
}

h1 .bi {
  font-size: 1.2em;
}

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

#fileInfo,
#columnSelection,
#dataPreview,
#processingStatus,
#results {
  animation: fadeIn 0.5s ease;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .container {
    padding: 0 15px;
  }

  .display-5 {
    font-size: 2rem;
  }

  .card-body {
    padding: 1.5rem !important;
  }

  .btn-lg {
    padding: 0.675rem 1.25rem;
    font-size: 1rem;
  }

  .form-check {
    padding: 0.75rem;
  }
}

/* Accessibility improvements */
.form-check-input:focus {
  box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

.btn:focus {
  box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

/* Smooth scrolling */
html {
  scroll-behavior: smooth;
}