/* CSS Custom Properties for Theming */
:root {
  /* Default Color Palette - Professional Blue */
  --primary-color: #2563eb;
  --secondary-color: #64748b;
  --background-color: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --border-color: #e2e8f0;
  --hover-color: #3b82f6;
  
  /* Typography */
  --font-family-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-base: 16px;
  --font-size-large: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --line-height-base: 1.6;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  
  /* Layout */
  --container-max-width: 1200px;
  --bio-section-width: 35%;
  --links-section-width: 65%;
  --border-radius: 0.5rem;
  
  /* Transitions */
  --transition-base: all 0.2s ease-in-out;
}

/* Alternative Color Palettes - Uncomment one to use */

/* Palette 2: Emerald Green - Professional & Fresh */
/*
:root {
  --primary-color: #059669;
  --secondary-color: #6b7280;
  --background-color: #ffffff;
  --text-primary: #111827;
  --text-secondary: #6b7280;
  --border-color: #d1fae5;
  --hover-color: #10b981;
}
*/

/* Palette 3: Purple - Creative & Modern */
/*
:root {
  --primary-color: #7c3aed;
  --secondary-color: #6b7280;
  --background-color: #ffffff;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --border-color: #ede9fe;
  --hover-color: #8b5cf6;
}
*/

/* Palette 4: Orange - Energetic & Warm */
/*
:root {
  --primary-color: #ea580c;
  --secondary-color: #6b7280;
  --background-color: #ffffff;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --border-color: #fed7aa;
  --hover-color: #f97316;
}
*/

/* Palette 5: Teal - Calm & Professional */
/*
:root {
  --primary-color: #0d9488;
  --secondary-color: #6b7280;
  --background-color: #ffffff;
  --text-primary: #111827;
  --text-secondary: #6b7280;
  --border-color: #ccfbf1;
  --hover-color: #14b8a6;
}
*/

/* Palette 6: Dark Mode - Sleek & Modern */
/*
:root {
  --primary-color: #60a5fa;
  --secondary-color: #9ca3af;
  --background-color: #111827;
  --text-primary: #f9fafb;
  --text-secondary: #d1d5db;
  --border-color: #374151;
  --hover-color: #93c5fd;
}
*/

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

body {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--text-primary);
  background-color: var(--background-color);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  margin: 0;
  /* Smooth scrolling for better UX */
  scroll-behavior: smooth;
  /* Prevent horizontal scroll on mobile */
  overflow-x: hidden;
}

/* Main Container - Flexbox Two-Column Layout */
.container {
  display: flex;
  max-width: var(--container-max-width);
  margin: 0 auto;
  min-height: 100vh;
  padding: var(--spacing-lg);
  gap: var(--spacing-xl);
  align-items: center;
  justify-content: center;
}

/* Card Container */
.container {
  background: linear-gradient(135deg, var(--background-color), rgba(37, 99, 235, 0.02), var(--background-color));
  border-radius: calc(var(--border-radius) * 2);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  border: 1px solid var(--border-color);
  margin: var(--spacing-lg);
}

/* Vertical Rule Between Sections */
.bio-section::after {
  content: '';
  position: absolute;
  right: 0;
  top: 10%;
  bottom: 10%;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--border-color), transparent);
}

/* Bio Section - Left Column */
.bio-section {
  flex: 0 0 var(--bio-section-width);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--spacing-lg);
  justify-content: center;
  position: relative;
}

/* Profile Photo Container */
.photo-container {
  width: 200px;
  height: 200px;
  margin-bottom: var(--spacing-lg);
  border-radius: 50%;
  overflow: hidden;
  border: 4px solid var(--border-color);
  transition: var(--transition-base);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Loading state for photo container */
.photo-container.loading {
  background: linear-gradient(45deg, #f0f0f0, #e0e0e0);
  background-size: 400% 400%;
  animation: shimmer 1.5s ease-in-out infinite;
}

@keyframes shimmer {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* Fallback photo styling */
.profile-photo-fallback {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-color), var(--hover-color));
  color: white;
  font-size: 3rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.photo-container:hover {
  border-color: var(--primary-color);
  transform: scale(1.05);
  box-shadow: 0 8px 25px rgba(37, 99, 235, 0.15);
}

.profile-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: var(--transition-base);
}

.profile-photo:hover {
  transform: scale(1.1);
}

/* Bio Content Styling */
.bio-content {
  max-width: 400px;
}

.name {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
  transition: var(--transition-base);
}

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

.title {
  font-size: var(--font-size-large);
  font-weight: 500;
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.description {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  line-height: var(--line-height-base);
  margin-bottom: 0;
}

/* Links Section - Right Column */
.links-section {
  flex: 1;
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.links-section h2 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  text-align: center;
  position: relative;
}

.links-section h2::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--hover-color));
  border-radius: 2px;
}

/* Links Container */
.links-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-sm);
  max-width: 400px;
  margin: 0 auto;
  width: 100%;
}

/* Individual Link Items */
.link-item {
  display: flex;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--background-color);
  border: 2px solid var(--border-color);
  border-radius: 50px;
  text-decoration: none;
  color: var(--text-primary);
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.link-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transition: left 0.5s ease;
}

.link-item:hover::before {
  left: 100%;
}

.link-item:hover {
  border-color: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(37, 99, 235, 0.15);
  background: linear-gradient(135deg, var(--background-color), rgba(37, 99, 235, 0.02));
}

.link-item:active {
  transform: translateY(0);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.1);
}

/* Link Icon */
.link-icon {
  font-size: 1.5rem;
  margin-right: var(--spacing-md);
  flex-shrink: 0;
  transition: var(--transition-base);
}

.link-item:hover .link-icon {
  transform: scale(1.1) rotate(5deg);
}

/* Link Content */
.link-content {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.link-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
  transition: var(--transition-base);
}

.link-description {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: var(--transition-base);
}

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

.link-item:hover .link-description {
  color: var(--text-primary);
}

/* External Link Indicator */
.link-external {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-left: var(--spacing-xs);
  transition: var(--transition-base);
  opacity: 0.7;
}

.link-item:hover .link-external {
  color: var(--primary-color);
  opacity: 1;
  transform: translateX(2px);
}

/* Focus States for Accessibility */
.link-item:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.link-item:focus:not(:focus-visible) {
  outline: none;
}

.link-item:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

/* Loading State for Links */
.link-item.loading {
  opacity: 0.6;
  pointer-events: none;
}

.link-item.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  right: var(--spacing-md);
  width: 16px;
  height: 16px;
  border: 2px solid var(--border-color);
  border-top: 2px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Page Load Animations */
.fade-in {
  opacity: 0;
  animation: fadeIn 0.8s ease forwards;
}

.fade-in-up {
  opacity: 0;
  animation: fadeInUp 0.6s ease forwards;
}

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

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Touch feedback for mobile */
.link-item.touch-active {
  transform: scale(0.98);
  opacity: 0.8;
}

/* Responsive Breakpoints */

/* Tablet Breakpoint (768px and below) */
@media (max-width: 768px) {
  .container {
    flex-direction: column;
    padding: var(--spacing-md);
    gap: var(--spacing-lg);
    align-items: stretch;
    margin: var(--spacing-md);
    min-height: calc(100vh - 2 * var(--spacing-md));
  }
  
  /* Hide vertical rule on mobile */
  .bio-section::after {
    display: none;
  }
  
  .bio-section {
    flex: none;
    width: 100%;
    padding: var(--spacing-md);
    justify-content: flex-start;
  }
  
  .photo-container {
    width: 150px;
    height: 150px;
    margin-bottom: var(--spacing-md);
  }
  
  .links-section {
    flex: none;
    width: 100%;
    padding: var(--spacing-md);
  }
  
  .links-container {
    max-width: 100%;
  }
  
  .link-item {
    padding: var(--spacing-sm) var(--spacing-md);
    /* Ensure adequate touch targets */
    min-height: 44px;
  }
  
  .links-section h2 {
    font-size: var(--font-size-large);
    margin-bottom: var(--spacing-md);
  }
}

/* Mobile Breakpoint (480px and below) */
@media (max-width: 480px) {
  :root {
    --font-size-base: 14px;
    --font-size-large: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.75rem;
  }
  
  .container {
    padding: var(--spacing-sm);
    gap: var(--spacing-md);
    margin: var(--spacing-sm);
    min-height: 100vh;
  }
  
  .bio-section,
  .links-section {
    padding: var(--spacing-sm);
  }
  
  .photo-container {
    width: 120px;
    height: 120px;
    margin-bottom: var(--spacing-sm);
  }
  
  .bio-content {
    max-width: 100%;
  }
  
  .link-item {
    padding: var(--spacing-xs) var(--spacing-sm);
    /* Larger touch targets for mobile */
    min-height: 48px;
  }
  
  .link-icon {
    font-size: 1.25rem;
    margin-right: var(--spacing-sm);
  }
  
  .link-title {
    font-size: 0.875rem;
  }
  
  .link-description {
    font-size: 0.75rem;
  }
  
  /* Improve touch interaction */
  .link-item:active {
    transform: scale(0.98);
  }
}

/* Large Desktop Breakpoint (1200px and above) */
@media (min-width: 1200px) {
  .container {
    padding: var(--spacing-xl);
  }
}

/* Theme-specific body classes */
body.theme-dark {
  background: linear-gradient(135deg, #0f172a, #1e293b);
}

body.theme-blue {
  background: linear-gradient(135deg, #f8fafc, #f1f5f9);
}

body.theme-emerald {
  background: linear-gradient(135deg, #f0fdf4, #ecfdf5);
}

body.theme-purple {
  background: linear-gradient(135deg, #faf5ff, #f3e8ff);
}

body.theme-orange {
  background: linear-gradient(135deg, #fff7ed, #ffedd5);
}

body.theme-teal {
  background: linear-gradient(135deg, #f0fdfa, #ccfbf1);
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
  .fade-in,
  .fade-in-up,
  .link-item,
  .photo-container,
  .profile-photo {
    animation: none !important;
    transition: none !important;
  }
  
  .link-item {
    opacity: 1;
    transform: none;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .link-item {
    border-width: 3px;
  }
  
  .photo-container {
    border-width: 6px;
  }
  
  .link-item:hover {
    border-width: 3px;
  }
}

/* Print styles */
@media print {
  .container {
    box-shadow: none;
    border: 1px solid #000;
    background: white;
  }
  
  .link-item {
    border: 1px solid #000;
    background: white;
    color: black;
    page-break-inside: avoid;
  }
  
  .link-item::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: #666;
  }
}