/* ===================================
   Text Bubble Generator - Main Styles
   =================================== */

/* CSS Variables for Theme */
:root {
  /* Colors - Light Mode */
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-tertiary: #f3f4f6;
  --text-primary: #111827;
  --text-secondary: #6b7280;
  --text-tertiary: #9ca3af;
  --border-color: #e5e7eb;
  --border-hover: #d1d5db;
  --accent-color: #4F46E5;
  --accent-hover: #4338CA;
  --accent-light: #EEF2FF;
  --success-color: #10b981;
  --error-color: #ef4444;
  --warning-color: #f59e0b;
  
  /* 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);
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'Courier New', Courier, monospace;
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 200ms ease-in-out;
  --transition-slow: 300ms ease-in-out;
  
  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --bg-primary: #111827;
  --bg-secondary: #1f2937;
  --bg-tertiary: #374151;
  --text-primary: #f9fafb;
  --text-secondary: #d1d5db;
  --text-tertiary: #9ca3af;
  --border-color: #374151;
  --border-hover: #4b5563;
  --accent-color: #818cf8;
  --accent-hover: #6366f1;
  --accent-light: #312e81;
  --success-color: #34d399;
  --error-color: #f87171;
  --warning-color: #fbbf24;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
}

/* ===================================
   Reset & Base Styles
   =================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color var(--transition-base), color var(--transition-base);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1.125rem; }

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

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

a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

/* ===================================
   Layout Components
   =================================== */

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-narrow {
  max-width: 960px;
}

.container-wide {
  max-width: 1440px;
}

/* ===================================
   Header & Navigation
   =================================== */

.header {
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-lg);
  gap: var(--spacing-lg);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}

.logo:hover {
  text-decoration: none;
  color: var(--accent-color);
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
}

/* Navigation */
.nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  list-style: none;
}

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover {
  color: var(--accent-color);
  background-color: var(--accent-light);
  text-decoration: none;
}

.nav-link.active {
  color: var(--accent-color);
  background-color: var(--accent-light);
}

/* Language Switcher */
.language-switcher {
  position: relative;
}

.language-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  font-weight: 500;
  transition: background-color var(--transition-fast);
}

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

.language-dropdown {
  position: absolute;
  top: calc(100% + var(--spacing-xs));
  right: 0;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 200px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
  z-index: var(--z-dropdown);
}

.language-switcher:hover .language-dropdown,
.language-dropdown:hover {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.language-dropdown a {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-secondary);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.language-dropdown a:hover {
  background-color: var(--accent-light);
  color: var(--accent-color);
  text-decoration: none;
}

/* Theme Toggle */
.theme-toggle {
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  transition: background-color var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
}

.theme-toggle:hover {
  background-color: var(--bg-tertiary);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

/* ===================================
   Hero Section
   =================================== */

.hero {
  padding: var(--spacing-3xl) 0;
  background: linear-gradient(135deg, var(--accent-light) 0%, var(--bg-secondary) 100%);
  text-align: center;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: var(--spacing-lg);
  background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto var(--spacing-xl);
}

/* ===================================
   Generator Tool Section
   =================================== */

.generator-section {
  padding: var(--spacing-3xl) 0;
}

.generator-container {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-lg);
}

.generator-tabs {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
  border-bottom: 2px solid var(--border-color);
}

.generator-tab {
  padding: var(--spacing-md) var(--spacing-lg);
  font-weight: 600;
  color: var(--text-secondary);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color var(--transition-fast), border-color var(--transition-fast);
  cursor: pointer;
}

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

.generator-tab.active {
  color: var(--accent-color);
  border-bottom-color: var(--accent-color);
}

.generator-content {
  display: none;
}

.generator-content.active {
  display: block;
}

/* Input Area */
.input-group {
  margin-bottom: var(--spacing-lg);
}

.input-label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.input-field {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-size: 1rem;
  transition: border-color var(--transition-fast);
}

.input-field:focus {
  outline: none;
  border-color: var(--accent-color);
}

.textarea-field {
  min-height: 120px;
  resize: vertical;
}

/* Style Selector */
.style-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.style-option {
  padding: var(--spacing-lg);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-primary);
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.style-option:hover {
  border-color: var(--accent-color);
  background-color: var(--accent-light);
}

.style-option.selected {
  border-color: var(--accent-color);
  background-color: var(--accent-light);
}

.style-icon {
  font-size: 2rem;
  margin-bottom: var(--spacing-sm);
}

.style-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* Preview Area */
.preview-container {
  background-color: var(--bg-primary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-lg);
}

.preview-canvas {
  max-width: 100%;
  height: auto;
}

.preview-text {
  font-size: 2rem;
  font-weight: 600;
  text-align: center;
  word-break: break-word;
}

/* Action Buttons */
.action-buttons {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.btn {
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  border: none;
}

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

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border: 2px solid var(--border-color);
}

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

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

.btn-success:hover {
  background-color: #059669;
}

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

/* ===================================
   Content Sections
   =================================== */

.section {
  padding: var(--spacing-3xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.section-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
}

/* Feature Grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
}

.feature-card {
  padding: var(--spacing-xl);
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.feature-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}

.feature-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

.feature-description {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Tool Grid */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.tool-card {
  display: block;
  padding: var(--spacing-lg);
  background-color: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-fast), transform var(--transition-fast);
  text-decoration: none;
}

.tool-card:hover {
  border-color: var(--accent-color);
  transform: translateY(-2px);
  text-decoration: none;
}

.tool-card h3 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.tool-card p {
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* FAQ Section */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  margin-bottom: var(--spacing-lg);
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: var(--spacing-lg);
  text-align: left;
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--text-primary);
  background-color: var(--bg-secondary);
  border: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color var(--transition-fast);
}

.faq-question:hover {
  background-color: var(--bg-tertiary);
}

.faq-icon {
  transition: transform var(--transition-fast);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

.faq-answer-content {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===================================
   Footer
   =================================== */

.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
  margin-top: var(--spacing-3xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-column h4 {
  font-size: 1rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.footer-column ul {
  list-style: none;
}

.footer-column li {
  margin-bottom: var(--spacing-sm);
}

.footer-column a {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-column a:hover {
  color: var(--accent-color);
  text-decoration: none;
}

.footer-bottom {
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.regional-links {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

.regional-links a {
  color: var(--accent-color);
  margin: 0 var(--spacing-sm);
}

.copyright {
  color: var(--text-tertiary);
  font-size: 0.875rem;
}

/* ===================================
   Utility Classes
   =================================== */

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

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.hidden { display: none; }
.visible { display: block; }

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 1024px) {
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .generator-tabs {
    flex-direction: column;
  }
  
  .generator-tab {
    text-align: left;
  }
  
  .action-buttons {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.25rem; }
  
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .generator-container {
    padding: var(--spacing-lg);
  }
  
  .style-grid {
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  }
}

/* ===================================
   Print Styles
   =================================== */

@media print {
  .header,
  .footer,
  .action-buttons,
  .ad-container {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
}


/* Generator Specific Styles */
.style-btn {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    min-width: 100px;
}

.style-btn:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

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

.style-btn .style-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.style-btn .style-name {
    font-size: 0.875rem;
    font-weight: 500;
}

.preview-canvas {
    width: 100%;
    max-width: 800px;
    height: auto;
    display: block;
    margin: 0 auto;
}

.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.input-group input[type="color"] {
    width: 100px;
    height: 40px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
}

.input-group input[type="range"] {
    width: 100%;
    max-width: 300px;
}

/* Notification Animation */
@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

.notification {
    animation: slideIn 0.3s ease;
}