/* Design Tokens & CSS Variables */
:root {
  --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Color Palette */
  --primary: #FF7A00;
  --primary-hover: #E06B00;
  --primary-light: rgba(255, 122, 0, 0.15);
  
  --bg-color: #FAFAFB;
  --surface-color: #FFFFFF;
  --border-color: #E5E7EB;
  
  --text-primary: #1F2937;
  --text-secondary: #4B5563;
  --text-muted: #9CA3AF;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Theme Variables */
body.dark-theme {
  --bg-color: #0B0F19;
  --surface-color: #151D30;
  --border-color: #24304A;
  
  --text-primary: #F3F4F6;
  --text-secondary: #D1D5DB;
  --text-muted: #6B7280;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

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

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

/* Header Styles */
.app-header {
  background-color: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

body.dark-theme .app-header {
  background-color: rgba(21, 29, 48, 0.8);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 12px;
}

.backeer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-icon {
  animation: float 4s ease-in-out infinite;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 22px;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.separator {
  color: var(--text-muted);
  font-weight: 300;
}

.app-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 16px;
  color: var(--primary);
  letter-spacing: -0.2px;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-link {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 15px;
  color: var(--text-secondary);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--primary);
  background-color: var(--primary-light);
}

.theme-toggle-btn {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

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

/* Hero Section */
.hero-section {
  padding: 60px 24px 40px;
  text-align: center;
}

.hero-container {
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 48px;
  line-height: 1.1;
  letter-spacing: -1.5px;
  margin-bottom: 16px;
}

.hero-title .highlight {
  color: var(--primary);
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  font-weight: 400;
}

/* Shared Section Layouts */
.section-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px;
}

.card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: background-color var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

/* Grid Customizer Layout */
.grid-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 32px;
}

@media (max-width: 900px) {
  .grid-layout {
    grid-template-columns: 1fr;
  }
}

/* Preview Box Styles */
.preview-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.preview-header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-parent;
  align-items: center;
  justify-content: space-between;
}

.preview-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 16px;
}

.canvas-controls {
  display: flex;
  gap: 8px;
}

.canvas-bg-btn {
  background: none;
  border: 2px solid transparent;
  border-radius: 50%;
  cursor: pointer;
  padding: 2px;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition-fast);
}

.canvas-bg-btn.active {
  border-color: var(--primary);
}

.btn-indicator {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 1px solid rgba(0, 0, 0, 0.1);
}

.grid-indicator {
  background-color: #F3F4F6;
  background-image: radial-gradient(#D1D5DB 1px, transparent 0);
  background-size: 4px 4px;
}

.light-indicator {
  background-color: #FFFFFF;
}

.dark-indicator {
  background-color: #1F2937;
}

.brand-indicator {
  background-color: #FF7A00;
}

.canvas-body {
  flex-grow: 1;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  transition: background-color var(--transition-normal);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  overflow: hidden;
}

/* Canvas Background Variants */
.canvas-body.grid-bg {
  background-color: var(--bg-color);
  background-image: 
    linear-gradient(var(--border-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-color) 1px, transparent 1px);
  background-size: 20px 20px;
}

.canvas-body.light-bg {
  background-color: #FFFFFF;
}

.canvas-body.dark-bg {
  background-color: #1F2937;
}

.canvas-body.brand-bg {
  background-color: #FF7A00;
}

.canvas-body svg {
  max-width: 100%;
  max-height: 400px;
  filter: drop-shadow(0 10px 20px rgba(0,0,0,0.1));
  transition: transform var(--transition-normal);
}

.preview-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* Button UI */
.btn {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14px;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.btn:active {
  transform: scale(0.98);
}

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

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

.btn-secondary {
  background-color: var(--surface-color);
  border-color: var(--border-color);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background-color: var(--bg-color);
}

/* Customizer Controls Panel */
.controls-card {
  padding: 32px;
}

.controls-heading {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 24px;
  margin-bottom: 24px;
  letter-spacing: -0.5px;
}

.control-group {
  margin-bottom: 24px;
}

.control-label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14px;
  color: var(--text-secondary);
  display: block;
  margin-bottom: 8px;
}

/* Radio Toggle Group */
.radio-toggle-group {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
  gap: 8px;
  border: 1px solid var(--border-color);
  padding: 4px;
  border-radius: var(--radius-md);
  background-color: var(--bg-color);
}

.radio-toggle-group input[type="radio"] {
  display: none;
}

.radio-toggle-group label {
  text-align: center;
  font-weight: 600;
  font-size: 13px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-secondary);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.radio-toggle-group input[type="radio"]:checked + label {
  background-color: var(--surface-color);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

/* Select wrapper */
.select-wrapper {
  position: relative;
}

.control-select {
  width: 100%;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 14px;
  color: var(--text-primary);
  padding: 12px 16px;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  outline: none;
  cursor: pointer;
  appearance: none;
  transition: border-color var(--transition-fast);
}

.control-select:focus {
  border-color: var(--primary);
}

.select-wrapper::after {
  content: "";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  border-top: 5px solid var(--text-secondary);
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  pointer-events: none;
}

/* Gallery Section Layout */
.section-header {
  text-align: center;
  margin-bottom: 40px;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 36px;
  margin-bottom: 8px;
  letter-spacing: -1px;
}

.section-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 24px;
}

.gallery-tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}

.gallery-tab-btn {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14px;
  padding: 8px 16px;
  border-radius: 30px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.gallery-tab-btn:hover, .gallery-tab-btn.active {
  background-color: var(--primary);
  border-color: var(--primary);
  color: #FFFFFF;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}

/* Gallery Card Styles */
.gallery-card {
  display: flex;
  flex-direction: column;
  padding: 16px;
  border-radius: var(--radius-md);
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.gallery-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.gallery-card-preview {
  height: 180px;
  background-color: var(--bg-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  margin-bottom: 16px;
  overflow: hidden;
}

.gallery-card-preview svg {
  max-height: 100%;
  max-width: 100%;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.05));
}

.gallery-card-info {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 16px;
}

.gallery-card-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.2px;
}

.gallery-card-desc {
  font-size: 13px;
  color: var(--text-secondary);
}

.gallery-card-actions {
  display: flex;
  gap: 8px;
}

.gallery-card-actions .btn {
  flex-grow: 1;
  justify-content: center;
  font-size: 12px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
}

/* Guidelines Styles */
.guidelines-card {
  padding: 40px;
}

.guidelines-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 32px;
  margin-bottom: 12px;
  letter-spacing: -0.8px;
}

.guidelines-intro {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 800px;
  margin-bottom: 32px;
}

.guidelines-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

@media (max-width: 768px) {
  .guidelines-grid {
    grid-template-columns: 1fr;
  }
}

.guideline-card {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  background-color: var(--bg-color);
}

.guideline-card.span-2 {
  grid-column: span 2;
}

@media (max-width: 768px) {
  .guideline-card.span-2 {
    grid-column: span 1;
  }
}

.guideline-card h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  margin-bottom: 16px;
  color: var(--text-primary);
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 8px;
}

/* Color Swatches */
.color-swatches {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.swatch-item {
  display: flex;
  align-items: center;
  gap: 12px;
}

.swatch-color {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

.swatch-info {
  display: flex;
  flex-direction: column;
}

.swatch-name {
  font-weight: 600;
  font-size: 14px;
}

.swatch-hex {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
}

/* Dos and Donts List */
.dos-donts-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.list-do, .list-dont {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
}

.list-do svg {
  color: var(--primary);
  margin-top: 4px;
  flex-shrink: 0;
}

.list-dont svg {
  color: #EF4444;
  margin-top: 4px;
  flex-shrink: 0;
}

/* Code Snippet Box */
.code-snippet-box {
  margin-top: 16px;
  background-color: #1E293B;
  border-radius: var(--radius-sm);
  padding: 16px;
  color: #F8FAFC;
}

.code-box-title {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 8px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.code-snippet-box pre {
  margin: 0;
  overflow-x: auto;
}

.code-snippet-box code {
  font-family: var(--font-mono);
  font-size: 13px;
}

/* Footer Styles */
.app-footer {
  border-top: 1px solid var(--border-color);
  padding: 24px;
  text-align: center;
  margin-top: 60px;
  background-color: var(--surface-color);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
}

.app-footer p {
  font-size: 13px;
  color: var(--text-secondary);
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background-color: #1F2937;
  color: #FFFFFF;
  padding: 10px 20px;
  border-radius: 30px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14px;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  transition: opacity 0.3s ease, bottom 0.3s ease;
}

.toast.hidden {
  opacity: 0;
  bottom: 12px;
  pointer-events: none;
}

/* Utility / Helper Classes */
.hidden {
  display: none !important;
}

/* Keyframes */
@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-5px); }
  100% { transform: translateY(0px); }
}