/* ==========================================
   MAIN STYLES & THEME SYSTEM
   ========================================== */

/* CSS Custom Properties for Theming */
:root {
  /* Light Theme Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-accent: #e2e8f0;
  
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-inverse: #ffffff;
  
  --border-color: #e2e8f0;
  --border-hover: #cbd5e1;
  
  /* Brand Colors */
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --primary-light: #dbeafe;
  --primary-dark: #1e40af;
  
  --secondary: #6366f1;
  --secondary-hover: #4f46e5;
  --secondary-light: #e0e7ff;
  
  --accent: #8b5cf6;
  --accent-hover: #7c3aed;
  --accent-light: #ede9fe;
  
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  
  /* 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;
  
  /* Typography */
  --font-family-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-family-mono: 'SF Mono', Monaco, Inconsolata, 'Roboto Mono', monospace;
  
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  
  /* Animations */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Borders */
  --border-radius-sm: 0.25rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 0.75rem;
  --border-radius-xl: 1rem;
  --border-radius-full: 9999px;
  
  /* Z-Index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal: 1040;
  --z-tooltip: 1050;
}

/* Dark Theme */
[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-accent: #475569;
  
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-inverse: #0f172a;
  
  --border-color: #334155;
  --border-hover: #475569;
  
  --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, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
}

/* Fun Mode Colors */
[data-mode="fun"] {
  --primary: #ff6b6b;
  --primary-hover: #ff5252;
  --primary-light: #ffebee;
  --primary-dark: #d32f2f;
  
  --secondary: #4ecdc4;
  --secondary-hover: #26c6da;
  --secondary-light: #e0f2f1;
  
  --accent: #ffd93d;
  --accent-hover: #ffca28;
  --accent-light: #fff8e1;
  
  --success: #6bcf7f;
  --warning: #ffb74d;
  --error: #ff5722;
}

/* Fun Mode Dark Theme */
[data-theme="dark"][data-mode="fun"] {
  --primary: #ff8a80;
  --primary-hover: #ff7043;
  --secondary: #80cbc4;
  --secondary-hover: #4db6ac;
  --accent: #fff176;
  --accent-hover: #ffeb3b;
}

/* Black and Gold Theme */
[data-theme="gold"] {
  --bg-primary: #000000;
  --bg-secondary: #1a1a1a;
  --bg-tertiary: #2d2d2d;
  --bg-accent: #404040;
  
  --text-primary: #ffffff;
  --text-secondary: #cccccc;
  --text-muted: #888888;
  --text-inverse: #000000;
  
  --border-color: #404040;
  --border-hover: #555555;
  
  --primary: #cc9933;
  --primary-hover: #daa520;
  --primary-light: #1a1611;
  --primary-dark: #a67c1e;
  
  --secondary: #b8860b;
  --secondary-hover: #daa520;
  --secondary-light: #191611;
  
  --accent: #f4e4bc;
  --accent-hover: #f7ead1;
  --accent-light: #1a1915;
  
  --success: #32cd32;
  --warning: #cc9933;
  --error: #dc3545;
  
  --shadow-sm: 0 1px 2px 0 rgba(204, 153, 51, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(204, 153, 51, 0.15), 0 2px 4px -1px rgba(204, 153, 51, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(204, 153, 51, 0.2), 0 4px 6px -2px rgba(204, 153, 51, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(204, 153, 51, 0.25), 0 10px 10px -5px rgba(204, 153, 51, 0.1);
}

/* Black and Gold Fun Mode */
[data-theme="gold"][data-mode="fun"] {
  --primary: #cc9933;
  --primary-hover: #daa520;
  --secondary: #b8860b;
  --secondary-hover: #daa520;
  --accent: #f4e4bc;
  --accent-hover: #f7ead1;
  
  --success: #32cd32;
  --warning: #cc9933;
  --error: #ff6b6b;
}

/* ==========================================
   RESET & BASE STYLES
   ========================================== */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: color var(--transition-normal), background-color var(--transition-normal);
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: var(--line-height-tight);
  color: var(--text-primary);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

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

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

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

a:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Lists */
ul, ol {
  list-style: none;
}

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

/* Buttons */
button {
  background: none;
  border: none;
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  transition: all var(--transition-fast);
}

button:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Form Elements */
input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* ==========================================
   UTILITY CLASSES
   ========================================== */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ==========================================
   BUTTON STYLES
   ========================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius-md);
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
}

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

.btn-primary:hover {
  background-color: var(--primary-hover);
  border-color: var(--primary-hover);
  color: var(--text-inverse);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
  background-color: var(--primary);
  color: var(--text-inverse);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Button Icons */
.btn svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.btn:hover svg {
  transform: translateX(2px);
}

/* ==========================================
   NAVIGATION
   ========================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: var(--z-fixed);
  transition: all var(--transition-normal);
}

[data-theme="dark"] .navbar {
  background-color: rgba(15, 23, 42, 0.95);
}

[data-theme="gold"] .navbar {
  background-color: rgba(0, 0, 0, 0.95);
  border-bottom-color: var(--primary);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 70px;
}

.nav-brand {
  display: flex;
  align-items: center;
}

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

.logo-text {
  font-size: var(--font-size-2xl);
  color: var(--primary);
}

.logo-subtitle {
  color: var(--text-secondary);
  font-size: var(--font-size-lg);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  width: 24px;
  height: 24px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
}

.nav-toggle span {
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  transition: all var(--transition-fast);
  transform-origin: center;
}

.nav-toggle span:not(:last-child) {
  margin-bottom: 4px;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

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

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  text-decoration: none;
  transition: color var(--transition-fast);
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary);
  transition: width var(--transition-fast);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

/* Theme Selector */
.theme-selector {
  position: relative;
}

.theme-selector-button {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-md);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-width: 80px;
}

.theme-selector-button:hover {
  background-color: var(--bg-accent);
  transform: translateY(-1px);
}

.theme-text {
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-transform: capitalize;
}

.theme-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
  z-index: var(--z-dropdown);
  min-width: 120px;
}

.theme-selector.active .theme-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.theme-option {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  background: transparent;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: var(--font-size-sm);
}

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

.theme-option:first-child {
  border-radius: var(--border-radius-md) var(--border-radius-md) 0 0;
}

.theme-option:last-child {
  border-radius: 0 0 var(--border-radius-md) var(--border-radius-md);
}

.theme-option.active {
  background-color: var(--primary-light);
  color: var(--primary);
}

/* Theme-specific adjustments */
[data-theme="gold"] .theme-selector-button {
  background-color: var(--bg-secondary);
  border-color: var(--primary);
  color: var(--primary);
}

[data-theme="gold"] .theme-dropdown {
  background: var(--bg-secondary);
  border-color: var(--primary);
}

/* Gold theme specific text styling */
[data-theme="gold"] .logo {
  color: var(--primary);
}

[data-theme="gold"] .logo-text {
  color: var(--primary);
}

[data-theme="gold"] .logo-subtitle {
  color: var(--text-primary);
  font-weight: 600;
}

[data-theme="gold"] .nav-link {
  color: var(--text-primary);
  font-weight: 500;
}

[data-theme="gold"] .nav-link:hover {
  color: var(--primary);
}

[data-theme="gold"] .section-title,
[data-theme="gold"] .hero-title,
[data-theme="gold"] h1, [data-theme="gold"] h2, 
[data-theme="gold"] h3, [data-theme="gold"] h4, 
[data-theme="gold"] h5, [data-theme="gold"] h6 {
  color: var(--text-primary);
  font-weight: 700;
}

[data-theme="gold"] .hero-subtitle {
  color: var(--primary);
  font-weight: 600;
}

[data-theme="gold"] .product-title,
[data-theme="gold"] .feature-title,
[data-theme="gold"] .contact-text h3 {
  color: var(--text-primary);
  font-weight: 600;
}

[data-theme="gold"] .footer-logo .logo-text {
  color: var(--primary);
}

[data-theme="gold"] .footer-logo .logo-subtitle {
  color: var(--text-primary);
  font-weight: 600;
}

[data-theme="gold"] .footer-section h4 {
  color: var(--text-primary);
  font-weight: 600;
}

/* Mode Toggle */
.mode-toggle {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-lg);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.mode-toggle:hover {
  background-color: var(--bg-accent);
}

.mode-text {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.mode-slider {
  width: 40px;
  height: 20px;
  background-color: var(--bg-accent);
  border-radius: var(--border-radius-full);
  position: relative;
  transition: background-color var(--transition-fast);
}

.mode-slider-track {
  width: 16px;
  height: 16px;
  background-color: var(--primary);
  border-radius: var(--border-radius-full);
  position: absolute;
  top: 2px;
  left: 2px;
  transition: all var(--transition-fast);
}

[data-mode="fun"] .mode-slider-track {
  transform: translateX(20px);
}

[data-mode="fun"] .mode-text:last-child {
  color: var(--primary);
}

[data-mode="pro"] .mode-text:first-child {
  color: var(--primary);
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */

/* Mobile Navigation */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }
  
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    flex-direction: column;
    padding: var(--spacing-lg);
    gap: var(--spacing-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
  }
  
  .nav-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  
  .nav-list {
    flex-direction: column;
    gap: var(--spacing-lg);
  }
  
  .nav-controls {
    justify-content: center;
  }
}

/* Tablet */
@media (min-width: 769px) and (max-width: 1024px) {
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .nav-list {
    gap: var(--spacing-md);
  }
}

/* Desktop */
@media (min-width: 1025px) {
  .container {
    padding: 0 var(--spacing-xl);
  }
}

/* Large Desktop */
@media (min-width: 1440px) {
  .container {
    max-width: 1400px;
  }
}

/* ==========================================
   ANIMATIONS & TRANSITIONS
   ========================================== */

/* Smooth scrolling for all elements */
* {
  scroll-behavior: smooth;
}

/* Reduced motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Page load animation */
body {
  opacity: 0;
  animation: fadeIn 0.5s ease-out forwards;
}

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

/* Focus animations */
:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Selection styles */
::selection {
  background-color: var(--primary-light);
  color: var(--text-primary);
}

/* Scrollbar styles */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: var(--border-radius-sm);
}

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

/* ==========================================
   PRINT STYLES
   ========================================== */

@media print {
  * {
    background: transparent !important;
    color: black !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }
  
  a, a:visited {
    text-decoration: underline;
  }
  
  .navbar, .nav-controls, .cursor-trail, .confetti-container {
    display: none !important;
  }
  
  .container {
    max-width: none !important;
    padding: 0 !important;
  }
}