/* Modern Effects and Dark Mode for Purav Portfolio */

/* CSS Variables for Theme Switching */
:root {
  /* Light Theme Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #e9ecef;
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --text-muted: #adb5bd;
  --border-color: #dee2e6;
  --shadow-color: rgba(0, 0, 0, 0.1);
  --card-bg: #ffffff;
  --navbar-bg: rgba(255, 255, 255, 0.95);
  --overlay-bg: rgba(0, 0, 0, 0.7);
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --accent-color: #ff7a57;
  --accent-hover: #e65a3a;
}

/* Dark Theme Colors */
[data-theme="dark"] {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --text-primary: #f0f6fc;
  --text-secondary: #c9d1d9;
  --text-muted: #8b949e;
  --border-color: #30363d;
  --shadow-color: rgba(0, 0, 0, 0.3);
  --card-bg: #161b22;
  --navbar-bg: rgba(13, 17, 23, 0.95);
  --overlay-bg: rgba(0, 0, 0, 0.8);
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --accent-color: #ff7a57;
  --accent-hover: #ff8f6b;
}

/* Apply Theme Colors */
body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: background-color 0.3s ease, color 0.3s ease;
}

.navbar {
  background-color: var(--navbar-bg) !important;
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
}

/* Navbar text color for dark mode */
.navbar-nav .nav-link {
  color: var(--text-primary) !important;
  transition: color 0.3s ease;
}

.navbar-brand {
  color: var(--text-primary) !important;
}

.navbar-toggler {
  border-color: var(--border-color) !important;
}

.navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(0, 0, 0, 0.5)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

[data-theme="dark"] .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255, 255, 255, 0.5)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

.card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 6px var(--shadow-color);
  transition: all 0.3s ease;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px var(--shadow-color);
}

/* Dark Mode Toggle - Floating */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1000;
  background: var(--gradient-primary);
  border: none;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  cursor: pointer;
  box-shadow: 0 4px 15px var(--shadow-color);
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 20px;
}

.theme-toggle:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 20px var(--shadow-color);
}

/* Dark Mode Toggle - Navbar */
.theme-toggle-nav {
  background: none !important;
  border: none !important;
  color: var(--text-primary) !important;
  font-size: 18px !important;
  padding: 8px 15px !important;
  cursor: pointer;
  transition: all 0.3s ease;
  border-radius: 20px;
  margin-left: 10px;
}

.theme-toggle-nav:hover {
  background: var(--gradient-primary) !important;
  color: white !important;
  transform: scale(1.1);
}

.theme-toggle-nav:focus {
  outline: none;
  box-shadow: 0 0 0 2px var(--accent-color);
}

/* Scroll Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes slideInFromTop {
  from {
    opacity: 0;
    transform: translateY(-50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Animation Classes */
.animate-on-scroll {
  opacity: 0;
  transition: all 0.6s ease;
}

.animate-on-scroll.animated {
  opacity: 1;
}

.fade-in-up {
  animation: fadeInUp 0.8s ease forwards;
}

.fade-in-left {
  animation: fadeInLeft 0.8s ease forwards;
}

.fade-in-right {
  animation: fadeInRight 0.8s ease forwards;
}

.scale-in {
  animation: scaleIn 0.6s ease forwards;
}

.slide-in-top {
  animation: slideInFromTop 0.8s ease forwards;
}

/* Parallax Background */
.parallax-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  opacity: 0.1;
  background: 
    radial-gradient(circle at 20% 80%, var(--accent-color) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, #667eea 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, #f093fb 0%, transparent 50%);
  animation: float 20s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  33% { transform: translateY(-20px) rotate(1deg); }
  66% { transform: translateY(10px) rotate(-1deg); }
}

/* Modern Button Styles */
.btn-modern {
  background: var(--gradient-primary);
  border: none;
  border-radius: 25px;
  padding: 12px 30px;
  color: white;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px var(--shadow-color);
}

.btn-modern::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.btn-modern:hover::before {
  left: 100%;
}

.btn-modern:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--shadow-color);
}

/* Glassmorphism Cards */
.glass-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 15px;
  padding: 30px;
  box-shadow: 0 8px 32px var(--shadow-color);
}

[data-theme="dark"] .glass-card {
  background: rgba(22, 27, 34, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Floating Elements */
.floating {
  animation: floating 3s ease-in-out infinite;
}

@keyframes floating {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

/* Gradient Text */
.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: bold;
}

/* Hover Effects for Portfolio Items */
.img-wrapper {
  position: relative;
  overflow: hidden;
  border-radius: 15px;
  transition: all 0.3s ease;
}

.img-wrapper:hover {
  transform: scale(1.05);
  box-shadow: 0 15px 35px var(--shadow-color);
}

.img-wrapper .overlay {
  background: var(--overlay-bg);
  backdrop-filter: blur(5px);
  transition: all 0.3s ease;
}

.img-wrapper:hover .overlay {
  opacity: 1;
  transform: scale(1.1);
}

/* Progress Bar Animation */
.progress {
  background: var(--bg-tertiary);
  border-radius: 10px;
  overflow: hidden;
  height: 8px;
}

.progress-bar {
  background: var(--gradient-primary);
  border-radius: 10px;
  transition: width 1.5s ease;
  position: relative;
  overflow: hidden;
}

.progress-bar::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% { left: -100%; }
  100% { left: 100%; }
}

/* Navigation Hover Effects */
.navbar-nav .nav-link {
  position: relative;
  transition: all 0.3s ease;
}

.navbar-nav .nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

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

/* Social Icons Animation */
.socials .social-item {
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.socials .social-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--gradient-primary);
  transition: left 0.3s ease;
  z-index: -1;
}

.socials .social-item:hover::before {
  left: 0;
}

.socials .social-item:hover {
  transform: translateY(-3px) scale(1.1);
  color: white;
}

/* Form Input Styling */
.form-control {
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: 10px;
  color: var(--text-primary);
  transition: all 0.3s ease;
}

.form-control:focus {
  background: var(--bg-primary);
  border-color: var(--accent-color);
  box-shadow: 0 0 0 0.2rem rgba(255, 122, 87, 0.25);
  color: var(--text-primary);
}

/* Contact form specific styling for dark mode */
[data-theme="dark"] .form-control {
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  color: var(--text-primary);
}

[data-theme="dark"] .form-control:focus {
  background: var(--bg-tertiary);
  border-color: var(--accent-color);
  color: var(--text-primary);
}

[data-theme="dark"] .form-control::placeholder {
  color: var(--text-muted);
}

/* Contact form container styling */
.contact-form {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 15px;
  padding: 30px;
  box-shadow: 0 4px 6px var(--shadow-color);
}

[data-theme="dark"] .contact-form {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
}

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

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

::-webkit-scrollbar-thumb {
  background: var(--gradient-primary);
  border-radius: 4px;
}

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

/* Loading Animation */
.loading-spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--border-color);
  border-top: 4px solid var(--accent-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Particle Background */
.particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--accent-color);
  border-radius: 50%;
  animation: particle-float 6s infinite linear;
}

@keyframes particle-float {
  0% {
    transform: translateY(100vh) rotate(0deg);
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    transform: translateY(-100px) rotate(360deg);
    opacity: 0;
  }
}

/* Responsive Adjustments */
@media (max-width: 768px) {
  .theme-toggle {
    top: 15px;
    right: 15px;
    width: 45px;
    height: 45px;
    font-size: 18px;
  }
  
  .glass-card {
    padding: 20px;
  }
  
  .btn-modern {
    padding: 10px 25px;
    font-size: 14px;
  }
}

/* Smooth Transitions for Theme Switching */
* {
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* Enhanced Section Styling */
.section {
  position: relative;
  overflow: hidden;
  background-color: var(--bg-primary);
  transition: background-color 0.3s ease;
}

.section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--gradient-primary);
  opacity: 0.3;
}

/* Modern gradient overlays for sections */
.section::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.02) 50%, transparent 70%);
  pointer-events: none;
  z-index: 1;
}

/* Alternating section backgrounds for dark mode */
[data-theme="dark"] .section:nth-child(odd) {
  background-color: var(--bg-secondary);
}

[data-theme="dark"] .section:nth-child(even) {
  background-color: var(--bg-primary);
}

/* Light mode alternating backgrounds with gradients */
.section:nth-child(odd) {
  background: linear-gradient(135deg, 
    rgba(102, 126, 234, 0.05) 0%, 
    rgba(118, 75, 162, 0.05) 50%, 
    rgba(240, 147, 251, 0.05) 100%);
  position: relative;
}

.section:nth-child(odd)::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 80%, rgba(255, 122, 87, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(102, 126, 234, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(240, 147, 251, 0.1) 0%, transparent 50%);
  z-index: -1;
  opacity: 0.6;
  animation: section-float 20s ease-in-out infinite;
}

@keyframes section-float {
  0%, 100% { 
    transform: translateY(0px) rotate(0deg);
    opacity: 0.6;
  }
  33% { 
    transform: translateY(-10px) rotate(0.5deg);
    opacity: 0.8;
  }
  66% { 
    transform: translateY(5px) rotate(-0.5deg);
    opacity: 0.7;
  }
}

.section:nth-child(even) {
  background-color: var(--bg-primary);
}

/* Header Enhancement */
.header {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, 
    rgba(102, 126, 234, 0.05) 0%, 
    rgba(118, 75, 162, 0.05) 50%, 
    rgba(240, 147, 251, 0.05) 100%) !important;
}

.header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 80%, rgba(255, 122, 87, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(102, 126, 234, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(240, 147, 251, 0.1) 0%, transparent 50%);
  z-index: -1;
  opacity: 0.6;
  animation: section-float 20s ease-in-out infinite;
}

/* Header text colors for dark mode */
.header .title,
.header .subtitle,
.header p {
  color: var(--text-primary);
}

/* Widget styling for dark mode */
.header .widget {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
}

.header .widget .widget-item {
  border-color: var(--border-color);
}

/* Footer Enhancement */
.page-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  position: relative;
}

.page-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--gradient-primary);
  opacity: 0.3;
}

/* Additional dark mode improvements */
[data-theme="dark"] .subtitle {
  color: var(--text-secondary);
}

[data-theme="dark"] .section-title {
  color: var(--text-primary);
}

[data-theme="dark"] .card-body h5,
[data-theme="dark"] .card-body h6 {
  color: var(--text-primary);
}

[data-theme="dark"] .testmonial-card .title {
  color: var(--text-primary);
}

[data-theme="dark"] .testmonial-card .subtitle {
  color: var(--text-secondary);
}

[data-theme="dark"] .contact-infos .item h6 {
  color: var(--text-primary);
}

[data-theme="dark"] .contact-infos .item p {
  color: var(--text-secondary);
}

/* Contact section background for dark mode */
[data-theme="dark"] .contact {
  background-color: var(--bg-primary);
}

/* Form labels and text for dark mode */
[data-theme="dark"] .form-label,
[data-theme="dark"] label {
  color: var(--text-primary);
}

/* Textarea specific styling for dark mode */
[data-theme="dark"] textarea.form-control {
  background: var(--bg-secondary);
  color: var(--text-primary);
  resize: vertical;
}

[data-theme="dark"] textarea.form-control:focus {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

/* Light mode gradient text effects */
.section-title {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: bold;
}

.title {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: bold;
}

/* Dark mode overrides for gradient text */
[data-theme="dark"] .section-title,
[data-theme="dark"] .title {
  background: none;
  -webkit-background-clip: unset;
  -webkit-text-fill-color: unset;
  background-clip: unset;
  color: var(--text-primary);
}