/* Puzzle Engine V2 - Global Styles */

/* CSS Custom Properties */
:root {
  --color-primary: #6b46c1;
  --color-primary-dark: #553c9a;
  --color-primary-light: #9f7aea;
  --color-accent: #ed8936;
  --color-bg: #f7fafc;
  --color-bg-white: #ffffff;
  --color-text: #1a202c;
  --color-text-light: #718096;
  --color-border: #e2e8f0;
  --color-border-dark: #cbd5e0;
  --color-success: #48bb78;
  --color-error: #f56565;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --transition: 0.2s ease-in-out;
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Header */
.header {
  background: var(--color-bg-white);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header__content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  color: var(--color-primary);
  font-weight: 700;
  font-size: var(--spacing-lg);
}

.header__logo-icon {
  font-size: 1.5rem;
}

.header__nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.header__nav-link {
  padding: var(--spacing-xs) var(--spacing-sm);
  text-decoration: none;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  transition: var(--transition);
}

.header__nav-link:hover {
  background: var(--color-bg);
  color: var(--color-primary);
}

.header__nav-link.active {
  background: var(--color-primary);
  color: white;
}

/* Main Content */
.main-content {
  flex: 1;
  padding: var(--spacing-lg) 0;
}

/* Page Title */
.page-title {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.page-title h1 {
  margin: 0 0 var(--spacing-sm);
  color: var(--color-primary);
  font-size: 2rem;
}

.page-title p {
  margin: 0;
  color: var(--color-text-light);
  font-size: 1.1rem;
}

/* Controls Panel */
.controls {
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
}

.controls-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  align-items: flex-end;
}

.controls-row:last-child {
  margin-bottom: 0;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.control-group label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-light);
}

.control-group select,
.control-group input[type="number"],
.control-group input[type="text"] {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  background: var(--color-bg-white);
  color: var(--color-text);
  min-width: 120px;
  cursor: pointer;
  transition: var(--transition);
}

.control-group select:hover,
.control-group input:hover {
  border-color: var(--color-primary);
}

.control-group select:focus,
.control-group input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(107, 70, 193, 0.1);
}

.control-group select:disabled {
  background: var(--color-bg);
  cursor: not-allowed;
  opacity: 0.7;
}

.control-group--checkbox {
  flex-direction: row;
  align-items: center;
  gap: var(--spacing-sm);
}

.control-group--checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--color-primary);
}

.control-group--checkbox label {
  cursor: pointer;
  font-weight: 500;
}

/* Actions Row */
.controls-row--actions {
  justify-content: flex-start;
  gap: var(--spacing-sm);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
}

.btn--primary {
  background: var(--color-primary);
  color: white;
}

.btn--primary:hover {
  background: var(--color-primary-dark);
}

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

.btn--secondary {
  background: var(--color-bg-white);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn--secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn--accent {
  background: var(--color-accent);
  color: white;
}

.btn--accent:hover {
  background: #dd6b20;
}

/* Bulk Section */
.bulk-section {
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border);
}

.bulk-section summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--color-text-light);
  padding: var(--spacing-sm) 0;
}

.bulk-section summary:hover {
  color: var(--color-primary);
}

.bulk-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--color-bg);
  border-radius: var(--radius-sm);
}

.progress-container {
  flex: 1;
  min-width: 200px;
}

.progress-bar {
  height: 8px;
  background: var(--color-border);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: 4px;
  transition: width 0.3s ease;
  width: 0%;
}

.progress-text {
  display: block;
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-top: var(--spacing-xs);
}

/* Puzzle Display */
.puzzle-display {
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 400px;
}

.puzzle-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xl);
}

.puzzle-grid-wrapper {
  background: white;
  padding: var(--spacing-lg);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
}

/* Solution Section */
.solution-section {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-xl);
  border-top: 2px dashed var(--color-border);
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.solution-section h2 {
  color: var(--color-text-light);
  font-size: 1.25rem;
  margin-bottom: var(--spacing-lg);
}

/* Theme Selection */
.controls-row--themes {
  flex-direction: column;
  align-items: flex-start;
}

.theme-checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.theme-checkbox {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.875rem;
  transition: var(--transition);
}

.theme-checkbox:hover {
  background: var(--color-border);
}

.theme-checkbox input {
  accent-color: var(--color-primary);
}

.theme-checkbox.selected {
  background: var(--color-primary-light);
  color: white;
}

/* Custom Words Textarea */
.controls-row--custom-words {
  flex-direction: column;
  align-items: stretch;
  width: 100%;
}

.controls-row--custom-words label {
  margin-bottom: var(--spacing-xs);
}

#custom-words {
  width: 100%;
  min-height: 120px;
  padding: var(--spacing-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  resize: vertical;
}

#custom-words:focus {
  outline: none;
  border-color: var(--color-primary);
}

/* Footer */
.footer {
  background: var(--color-bg-white);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-lg) 0;
  margin-top: auto;
}

.footer__content {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
}

.footer__links {
  display: flex;
  gap: var(--spacing-lg);
}

.footer__links a {
  color: var(--color-text-light);
  text-decoration: none;
  font-size: 0.875rem;
}

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

.footer__license {
  color: var(--color-text-light);
  font-size: 0.875rem;
  margin: 0;
}

/* Homepage Cards */
.puzzle-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.puzzle-card {
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-xl);
  text-decoration: none;
  color: var(--color-text);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

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

.puzzle-card__icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.puzzle-card__title {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 var(--spacing-sm);
  color: var(--color-primary);
}

.puzzle-card__desc {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin: 0;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: var(--spacing-2xl) 0;
}

.hero h1 {
  font-size: 2.5rem;
  color: var(--color-primary);
  margin: 0 0 var(--spacing-md);
}

.hero p {
  font-size: 1.25rem;
  color: var(--color-text-light);
  margin: 0 0 var(--spacing-xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero__features {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.hero__feature {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-text-light);
}

.hero__feature-icon {
  color: var(--color-success);
}

/* Large Print Mode */
.large-print-mode {
  font-size: 18pt;
}

.large-print-mode .puzzle-grid td {
  min-width: 14mm;
  min-height: 14mm;
  font-size: 18pt;
}

.large-print-mode .puzzle-grid {
  max-width: 100%;
}

/* Print Styles */
@media print {
  .header,
  .footer,
  .controls,
  .bulk-section,
  .bulk-progress,
  .btn {
    display: none !important;
  }
  
  .puzzle-display {
    border: none;
    padding: 0;
    margin: 0;
    min-height: auto;
  }
  
  .puzzle-container {
    page-break-inside: avoid;
  }
  
  body {
    background: white;
    font-size: 12pt;
  }
  
  .puzzle-grid-wrapper {
    box-shadow: none;
    border: 1px solid #000;
  }
}

/* Responsive */
@media (max-width: 768px) {
  .header__content {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .header__nav {
    width: 100%;
    justify-content: flex-start;
  }
  
  .controls-row {
    flex-direction: column;
    align-items: stretch;
  }
  
  .control-group {
    width: 100%;
  }
  
  .control-group select,
  .control-group input {
    width: 100%;
  }
  
  .controls-row--actions {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
  
  .bulk-controls {
    flex-direction: column;
    align-items: stretch;
  }
  
  .footer__content {
    flex-direction: column;
    text-align: center;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .puzzle-grid {
    grid-template-columns: 1fr;
  }
}