/* ============================================
   Modern Design System for SAT Question Generator
   ============================================ */

/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Color Palette */
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --secondary: #64748b;
  --secondary-dark: #475569;
  --success: #10b981;
  --success-light: #34d399;
  --warning: #f59e0b;
  --error: #ef4444;
  --error-light: #f87171;
  
  /* Neutral Colors */
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--gray-800);
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  background-attachment: fixed;
  min-height: 100vh;
  padding: var(--spacing-lg);
  font-size: 16px;
}

/* Container */
.container {
  max-width: 1680px;
  margin: 0 auto;
  background: white;
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Typography */
h1 {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--spacing-lg);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: var(--spacing-md);
  line-height: 1.3;
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: var(--spacing-md);
}

h4 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: var(--spacing-sm);
}

p {
  color: var(--gray-600);
  margin-bottom: var(--spacing-md);
}

/* Links */
a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-dark);
}

/* Back Link */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--gray-600);
  font-size: 0.9375rem;
  margin-bottom: var(--spacing-lg);
  transition: color var(--transition-fast);
}

.back-link:hover {
  color: var(--primary);
}

/* Forms */

label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
  color: var(--gray-700);
  font-size: 0.9375rem;
}

input[type="text"],
input[type="number"],
input[type="email"],
select,
textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid var(--gray-300);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: inherit;
  color: var(--gray-800);
  background: white;
  transition: all var(--transition-base);
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

input::placeholder,
textarea::placeholder {
  color: var(--gray-400);
}

textarea {
  min-height: 120px;
  resize: vertical;
  line-height: 1.6;
}

/* Form Groups */
.form-group {
  margin-bottom: var(--spacing-lg);
}

select {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3E%3Cpath stroke='%236366f1' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M6 8l4 4 4-4'/%3E%3C/svg%3E");
  background-position: right 0.75rem center;
  background-repeat: no-repeat;
  background-size: 1.25em 1.25em;
  padding-right: 2.75rem;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
}

select:focus {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3E%3Cpath stroke='%236366f1' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M6 8l4 4 4-4'/%3E%3C/svg%3E");
}

/* Checkbox */
.checkbox-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--gray-50);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.checkbox-group:hover {
  background: var(--gray-100);
  border-color: var(--gray-300);
}

.checkbox-group:has(input:focus) {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

input[type="checkbox"] {
  width: 20px;
  height: 20px;
  cursor: pointer;
  accent-color: var(--primary);
  flex-shrink: 0;
  margin: 0;
}

.checkbox-group label {
  margin: 0;
  cursor: pointer;
  font-weight: 500;
  color: var(--gray-700);
  user-select: none;
}

/* Buttons */
.button-group {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

button,
.btn-primary,
.btn-secondary,
.btn-success {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  text-decoration: none;
  box-shadow: var(--shadow-sm);
}

button:disabled,
button:disabled:hover {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
}

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

.btn-secondary {
  background: var(--gray-600);
  color: white;
}

.btn-secondary:hover:not(:disabled) {
  background: var(--gray-700);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-success {
  background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
  color: white;
}

.btn-success:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  background: linear-gradient(135deg, #059669 0%, var(--success) 100%);
}

.btn-error {
  background: linear-gradient(135deg, var(--error) 0%, #dc2626 100%);
  color: white;
}

.btn-error:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  background: linear-gradient(135deg, #dc2626 0%, var(--error) 100%);
}

/* Small button variant */
.btn-sm {
  font-size: 0.875rem;
  padding: 0.5rem 1rem;
  line-height: 1;
}

/* Action buttons container */
.action-buttons {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
  justify-content: flex-start;
}

/* New Prompt Buttons */
.btn-new-prompt {
  cursor: pointer;
  border: none;
  outline: none;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 0.875rem;
  transition: all var(--transition-base);
}

.btn-new-prompt:hover {
  transform: translateY(-2px);
}

.btn-new-prompt:active {
  transform: translateY(0) !important;
}

.btn-new-prompt-generate {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.btn-new-prompt-generate:hover {
  box-shadow: 0 6px 16px rgba(102, 126, 234, 0.4);
}

.btn-new-prompt-training {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  color: white;
  box-shadow: 0 4px 12px rgba(245, 87, 108, 0.3);
}

.btn-new-prompt-training:hover {
  box-shadow: 0 6px 16px rgba(245, 87, 108, 0.4);
}

/* Cards */
.card {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--gray-300);
}

/* Empty State */
.empty-state-card {
  padding: var(--spacing-2xl);
  border: 2px dashed var(--gray-300);
  border-radius: var(--radius-xl);
  text-align: center;
  background: linear-gradient(135deg, var(--gray-50) 0%, white 100%);
  transition: all var(--transition-slow);
}

.empty-state-card:hover {
  border-color: var(--primary);
  background: linear-gradient(135deg, #f0f4ff 0%, white 100%);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Tables */
table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  font-size: 0.875rem;
}

thead {
  background: linear-gradient(135deg, var(--gray-100) 0%, var(--gray-50) 100%);
}

th {
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: left;
  font-weight: 600;
  color: var(--gray-700);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--gray-200);
}

td {
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--gray-200);
  color: var(--gray-700);
}

tbody tr {
  transition: background-color var(--transition-fast);
}

tbody tr:hover {
  background: var(--gray-50);
}

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


/* Status Badges */
.status-badge {
  display: inline-block;
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.status-success {
  background: #d1fae5;
  color: #065f46;
}

.status-partial {
  background: #fef3c7;
  color: #92400e;
}

.status-failed {
  background: #fee2e2;
  color: #991b1b;
}

/* Alerts & Messages */
.alert {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
  border-left: 4px solid;
}

.alert-success {
  background: #d1fae5;
  border-color: var(--success);
  color: #065f46;
}

.alert-warning {
  background: #fef3c7;
  border-color: var(--warning);
  color: #92400e;
}

.alert-error {
  background: #fee2e2;
  border-color: var(--error);
  color: #991b1b;
}

.alert-info {
  background: #dbeafe;
  border-color: var(--primary);
  color: #1e40af;
}

/* Output Section */
.output-section {
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-2xl);
  border-top: 2px solid var(--gray-200);
}

.raw-output {
  background: var(--gray-900);
  color: #10b981;
  border: 1px solid var(--gray-700);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  overflow-x: auto;
  font-family: "SF Mono", "Monaco", "Inconsolata", "Roboto Mono", monospace;
  font-size: 0.875rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-wrap: break-word;
  max-height: 600px;
  overflow-y: auto;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Warnings */
.warnings {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: #fef3c7;
  border: 1px solid var(--warning);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--warning);
}

.warnings h3 {
  margin-bottom: var(--spacing-sm);
  color: #92400e;
}

.warnings ul {
  margin-left: var(--spacing-xl);
  color: #92400e;
}

.warnings li {
  margin-bottom: var(--spacing-xs);
}

/* Error */
.error {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: #fee2e2;
  border: 1px solid var(--error);
  border-radius: var(--radius-lg);
  color: #991b1b;
  border-left: 4px solid var(--error);
}

/* Success Message */
.questions-summary {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: #d1fae5;
  border: 1px solid var(--success);
  border-radius: var(--radius-lg);
  color: #065f46;
  border-left: 4px solid var(--success);
}

/* Loading State */
.loading {
  opacity: 0.6;
  pointer-events: none;
  position: relative;
}

.loading::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid var(--primary);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Tabs */
.tabs {
  display: flex;
  gap: var(--spacing-md);
  border-bottom: 2px solid var(--gray-200);
  margin-bottom: var(--spacing-xl);
}

.tab {
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  background: none;
  cursor: pointer;
  font-weight: 500;
  color: var(--gray-600);
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
  position: relative;
  bottom: -2px;
}

.tab:hover {
  color: var(--primary);
}

.tab-active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 600;
}

/* Prompt Cards */
.prompt-card {
  padding: var(--spacing-lg);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-lg);
  background: white;
  transition: all var(--transition-base);
  margin-bottom: var(--spacing-md);
}

.prompt-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.prompt-card-active {
  border-color: var(--success);
  background: #f0fdf4;
}

/* Section Headers */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
}

.section-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--gray-800);
  margin: 0;
}

/* Page Header */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--spacing-2xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--gray-200);
}

/* Form Card */
.form-card {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
  box-shadow: var(--shadow-sm);
}

/* Responsive */
@media (max-width: 768px) {
  body {
    padding: var(--spacing-md);
  }
  
  .container {
    padding: var(--spacing-lg);
  }
  
  h1 {
    font-size: 1.75rem;
  }
  
  .page-header {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .button-group {
    flex-direction: column;
  }
  
  .button-group button,
  .button-group a {
    width: 100%;
  }
  
  table {
    font-size: 0.875rem;
  }
  
  th, td {
    padding: var(--spacing-sm);
  }
}