/* ============================================
   JurisDraft Design System
   Minimal/Clean Design with Dark/Light Theme
   ============================================ */

/* ============================================
   1. CSS Custom Properties (Theme Tokens)
   ============================================ */

:root {
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Monaco', 'Consolas', monospace;

  /* Sizing */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;

  /* Shadows (Minimal style) */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);

  /* Shared Accent Colors */
  --accent-primary: #3b82f6;
  --accent-primary-hover: #2563eb;
  --accent-primary-light: rgba(59, 130, 246, 0.1);
  --accent-success: #10b981;
  --accent-success-light: rgba(16, 185, 129, 0.1);
  --accent-warning: #f59e0b;
  --accent-warning-light: rgba(245, 158, 11, 0.1);
  --accent-error: #ef4444;
  --accent-error-light: rgba(239, 68, 68, 0.1);
}

/* Dark Theme (Default) */
[data-theme="dark"],
:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-elevated: #1e293b;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-tertiary: #64748b;
  --text-muted: #475569;

  --border-primary: rgba(255, 255, 255, 0.1);
  --border-secondary: rgba(255, 255, 255, 0.06);
  --border-focus: rgba(59, 130, 246, 0.5);

  --input-bg: #1e293b;
  --input-border: rgba(255, 255, 255, 0.1);

  --card-bg: #1e293b;
  --card-border: rgba(255, 255, 255, 0.06);
  --card-hover-border: rgba(255, 255, 255, 0.1);

  --scrollbar-track: transparent;
  --scrollbar-thumb: #475569;
  --scrollbar-thumb-hover: #64748b;
}

/* Light Theme */
[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-elevated: #ffffff;

  --text-primary: #0f172a;
  --text-secondary: #64748b;
  --text-tertiary: #94a3b8;
  --text-muted: #cbd5e1;

  --border-primary: rgba(0, 0, 0, 0.1);
  --border-secondary: rgba(0, 0, 0, 0.06);
  --border-focus: rgba(59, 130, 246, 0.5);

  --input-bg: #f8fafc;
  --input-border: rgba(0, 0, 0, 0.1);

  --card-bg: #ffffff;
  --card-border: rgba(0, 0, 0, 0.08);
  --card-hover-border: rgba(0, 0, 0, 0.15);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);

  --scrollbar-track: transparent;
  --scrollbar-thumb: #cbd5e1;
  --scrollbar-thumb-hover: #94a3b8;
}

/* ============================================
   2. Base Styles
   ============================================ */

* {
  box-sizing: border-box;
}

html {
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  padding: 0;
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: background var(--transition-base), color var(--transition-base);
}

/* Smooth theme transitions */
*,
*::before,
*::after {
  transition: background-color var(--transition-base),
              border-color var(--transition-base),
              color var(--transition-fast);
}

/* Exclude certain elements from transition */
iframe,
video,
canvas,
.no-transition,
.no-transition * {
  transition: none !important;
}

/* ============================================
   3. Typography
   ============================================ */

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.text-muted { color: var(--text-muted); }
.text-accent { color: var(--accent-primary); }
.text-success { color: var(--accent-success); }
.text-warning { color: var(--accent-warning); }
.text-error { color: var(--accent-error); }

.font-mono { font-family: var(--font-mono); }

.text-xs { font-size: var(--text-xs); }
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }
.text-2xl { font-size: var(--text-2xl); }

/* ============================================
   4. Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1.5;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--border-focus);
}

/* Primary Button - Solid blue */
.btn-primary {
  background: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-primary-hover);
  border-color: var(--accent-primary-hover);
}

/* Secondary Button - Outlined/Ghost */
.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-primary);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-tertiary);
  border-color: var(--card-hover-border);
}

/* Ghost Button */
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

/* Success Button */
.btn-success {
  background: var(--accent-success);
  color: #ffffff;
  border-color: var(--accent-success);
}

.btn-success:hover:not(:disabled) {
  background: #059669;
  border-color: #059669;
}

/* Warning Button */
.btn-warning {
  background: var(--accent-warning);
  color: #ffffff;
  border-color: var(--accent-warning);
}

.btn-warning:hover:not(:disabled) {
  background: #d97706;
  border-color: #d97706;
}

/* Button Sizes */
.btn-sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
}

.btn-lg {
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-base);
}

.btn-full {
  width: 100%;
}

/* Icon Button */
.btn-icon {
  padding: var(--space-2);
  width: 36px;
  height: 36px;
}

.btn-icon svg {
  width: 18px;
  height: 18px;
}

/* ============================================
   5. Form Controls
   ============================================ */

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--text-primary);
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-primary-light);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

.form-textarea.code {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.6;
}

.form-label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
}

/* ============================================
   6. Cards & Containers
   ============================================ */

.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.card:hover {
  border-color: var(--card-hover-border);
}

.card-elevated {
  background: var(--bg-elevated);
  box-shadow: var(--shadow-md);
}

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

/* ============================================
   7. Upload Zone
   ============================================ */

.upload-zone {
  border: 1px dashed var(--border-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  background: transparent;
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--accent-primary);
  background: var(--accent-primary-light);
}

.upload-zone-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-4);
  color: var(--text-tertiary);
}

.upload-zone:hover .upload-zone-icon,
.upload-zone.dragover .upload-zone-icon {
  color: var(--accent-primary);
}

.upload-zone-text {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-bottom: var(--space-3);
}

/* File Card */
.file-card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  margin-top: var(--space-2);
}

.file-card:hover {
  box-shadow: var(--shadow-sm);
}

.file-card-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-primary);
  color: #ffffff;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  font-size: var(--text-sm);
}

.file-card-info {
  flex: 1;
  min-width: 0;
}

.file-card-name {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-card-size {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

.file-card-remove {
  padding: var(--space-1) var(--space-2);
  background: none;
  border: none;
  color: var(--accent-error);
  cursor: pointer;
  font-size: var(--text-xs);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.file-card-remove:hover {
  background: var(--accent-error-light);
}

/* ============================================
   8. Status Messages & Badges
   ============================================ */

.status-box {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  margin-top: var(--space-3);
  border: 1px solid transparent;
}

.status-info {
  background: var(--accent-primary-light);
  color: var(--accent-primary);
  border-color: rgba(59, 130, 246, 0.2);
}

.status-success {
  background: var(--accent-success-light);
  color: var(--accent-success);
  border-color: rgba(16, 185, 129, 0.2);
}

.status-warning {
  background: var(--accent-warning-light);
  color: var(--accent-warning);
  border-color: rgba(245, 158, 11, 0.2);
}

.status-error {
  background: var(--accent-error-light);
  color: var(--accent-error);
  border-color: rgba(239, 68, 68, 0.2);
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 500;
  border-radius: var(--radius-full);
}

.badge-primary {
  background: var(--accent-primary-light);
  color: var(--accent-primary);
}

.badge-success {
  background: var(--accent-success-light);
  color: var(--accent-success);
}

.badge-warning {
  background: var(--accent-warning-light);
  color: var(--accent-warning);
}

.badge-error {
  background: var(--accent-error-light);
  color: var(--accent-error);
}

/* Field Stats Badge */
.field-stats {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  background: var(--accent-primary-light);
  color: var(--accent-primary);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
}

/* ============================================
   9. Workflow Stepper
   ============================================ */

.workflow-stepper {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
}

.step {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-tertiary);
  transition: all var(--transition-fast);
}

.step-number {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  font-size: 10px;
  font-weight: 600;
}

.step.active {
  color: var(--accent-primary);
  background: var(--accent-primary-light);
}

.step.active .step-number {
  background: var(--accent-primary);
  color: #ffffff;
}

.step.completed {
  color: var(--accent-success);
}

.step.completed .step-number {
  background: var(--accent-success);
  color: #ffffff;
}

.step-connector {
  width: 24px;
  height: 1px;
  background: var(--border-primary);
}

.step-connector.completed {
  background: var(--accent-success);
}

/* ============================================
   10. Theme Toggle
   ============================================ */

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--text-secondary);
}

.theme-toggle:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-color: var(--card-hover-border);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
}

/* Sun icon visible in dark mode, hidden in light mode */
[data-theme="dark"] .theme-toggle .sun-icon,
:root:not([data-theme="light"]) .theme-toggle .sun-icon {
  display: block;
}

[data-theme="dark"] .theme-toggle .moon-icon,
:root:not([data-theme="light"]) .theme-toggle .moon-icon {
  display: none;
}

/* Moon icon visible in light mode, hidden in dark mode */
[data-theme="light"] .theme-toggle .sun-icon {
  display: none;
}

[data-theme="light"] .theme-toggle .moon-icon {
  display: block;
}

/* ============================================
   11. Sidebar Layout
   ============================================ */

.sidebar {
  width: 400px;
  min-width: 400px;
  height: 100vh;
  overflow-y: auto;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-primary);
  display: flex;
  flex-direction: column;
}

.sidebar-section {
  padding: var(--space-5);
  border-bottom: 1px solid var(--border-secondary);
}

.sidebar-section:last-child {
  border-bottom: none;
}

.sidebar-header {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-3);
}

/* Scrollbar Styling */
.sidebar::-webkit-scrollbar {
  width: 6px;
}

.sidebar::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}

.sidebar::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
}

/* ============================================
   12. Main Workspace
   ============================================ */

.main-workspace {
  flex: 1;
  height: 100vh;
  background: var(--bg-primary);
  display: flex;
  flex-direction: column;
}

.pdf-container {
  flex: 1;
  width: 100%;
  height: 100%;
}

.pdf-container iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.pdf-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-tertiary);
}

.pdf-placeholder svg {
  width: 80px;
  height: 80px;
  margin-bottom: var(--space-4);
  opacity: 0.5;
}

/* ============================================
   13. Tip Box
   ============================================ */

.tip-box {
  background: var(--accent-primary-light);
  border-left: 3px solid var(--accent-primary);
  padding: var(--space-3) var(--space-4);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.tip-box strong {
  color: var(--accent-primary);
}

/* ============================================
   14. Header
   ============================================ */

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border-secondary);
}

.app-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}

.app-logo-icon {
  width: 36px;
  height: 36px;
  background: var(--accent-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.app-logo-text {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text-primary);
}

.app-logo-subtitle {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.home-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.home-link:hover {
  background: var(--card-hover-border);
  color: var(--text-primary);
}

/* ============================================
   15. Utilities
   ============================================ */

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }

.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }

.w-full { width: 100%; }
.h-full { height: 100%; }

.text-center { text-align: center; }

.hidden { display: none; }

/* ============================================
   16. Animations
   ============================================ */

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

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

.animate-spin {
  animation: spin 1s linear infinite;
}

.animate-fade-in {
  animation: fadeIn var(--transition-base) ease;
}

.animate-slide-up {
  animation: slideUp var(--transition-base) ease;
}

/* Loading Spinner */
.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ============================================
   17. Responsive
   ============================================ */

@media (max-width: 1024px) {
  .sidebar {
    width: 350px;
    min-width: 350px;
  }
}

@media (max-width: 768px) {
  .sidebar {
    width: 100%;
    min-width: 100%;
    height: auto;
    max-height: 50vh;
    border-right: none;
    border-bottom: 1px solid var(--border-primary);
  }

  .workspace-container {
    flex-direction: column;
  }

  .main-workspace {
    min-height: 50vh;
  }
}

/* ============================================
   18. Print Styles
   ============================================ */

@media print {
  .sidebar,
  .theme-toggle,
  .header-actions {
    display: none;
  }

  .main-workspace {
    width: 100%;
  }
}