/* ===== CSS Variables ===== */
:root {
  /* Color Palette - Dark Theme */
  --bg-primary: #0f0f23;
  --bg-secondary: #1a1a35;
  --bg-tertiary: #242449;
  --text-primary: #ffffff;
  --text-secondary: #b8b8d4;
  --text-muted: #8888aa;
  --accent-primary: #6366f1;
  --accent-secondary: #8b5cf6;
  --accent-tertiary: #06b6d4;
  
  /* Glass Morphism */
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: rgba(0, 0, 0, 0.3);
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --gradient-secondary: linear-gradient(135deg, #06b6d4 0%, #10b981 100%);
  --gradient-accent: linear-gradient(135deg, #f97316 0%, #ef4444 100%);
  --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --gradient-warning: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  --gradient-info: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
  
  /* Spacing */
  --spacing-unit: 8px;
  --border-radius: 12px;
  --border-radius-lg: 16px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-muted: #64748b;
  
  --glass-bg: rgba(255, 255, 255, 0.25);
  --glass-border: rgba(255, 255, 255, 0.3);
  --glass-shadow: rgba(0, 0, 0, 0.1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  overflow-x: hidden;
  transition: var(--transition);
}

/* ===== WebGL Canvas ===== */
#webgl-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
}

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

.text-accent {
  color: var(--accent-primary);
}

/* ===== Glass Morphism Components ===== */
.glass-morphism {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  box-shadow: 0 8px 32px var(--glass-shadow);
}

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius);
  box-shadow: 0 8px 32px var(--glass-shadow);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--glass-border), transparent);
}

.glass-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 48px var(--glass-shadow);
}

.glass-input {
  background: var(--glass-bg) !important;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border) !important;
  color: var(--text-primary) !important;
  transition: var(--transition);
}

.glass-input:focus {
  background: var(--glass-bg) !important;
  border-color: var(--accent-primary) !important;
  box-shadow: 0 0 0 0.2rem rgba(99, 102, 241, 0.25) !important;
  color: var(--text-primary) !important;
}

.glass-input::placeholder {
  color: var(--text-muted) !important;
}

/* ===== Header & Navigation ===== */
.navbar {
  transition: var(--transition);
  padding: 1rem 0;
}

.navbar-brand {
  font-size: 1.5rem;
  font-weight: 700;
}

.navbar-nav .nav-link {
  font-weight: 500;
  margin: 0 0.5rem;
  padding: 0.5rem 1rem !important;
  border-radius: var(--border-radius);
  transition: var(--transition);
  position: relative;
}

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

.navbar-nav .nav-link:hover::before {
  width: 80%;
}

.navbar-nav .nav-link:hover {
  color: var(--accent-primary) !important;
}

.theme-toggle,
.theme-toggle-footer {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  transition: var(--transition);
}

.theme-toggle:hover,
.theme-toggle-footer:hover {
  background: var(--accent-primary);
  color: white;
  transform: scale(1.1);
}

/* ===== Buttons ===== */
.btn {
  font-weight: 500;
  border-radius: var(--border-radius);
  padding: 0.75rem 2rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.btn-gradient {
  background: var(--gradient-primary);
  border: none;
  color: white;
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
}

.btn-gradient:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4);
  color: white;
}

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

.btn-outline-primary {
  border: 1px solid var(--accent-primary);
  color: var(--accent-primary);
  background: transparent;
}

.btn-outline-primary:hover {
  background: var(--accent-primary);
  color: white;
  transform: translateY(-2px);
}

/* ===== Hero Section ===== */
.hero-section {
  min-height: 100vh;
  padding-top: 120px;
  position: relative;
}

.hero-content {
  z-index: 2;
  position: relative;
}

.profile-container {
  position: relative;
  z-index: 2;
}

.profile-wrapper {
  position: relative;
  width: 300px;
  height: 300px;
  margin: 0 auto;
}

.profile-ring {
  position: absolute;
  top: -20px;
  left: -20px;
  right: -20px;
  bottom: -20px;
  border: 4px solid;
  border-color: var(--accent-primary);
  border-radius: 50%;
  background: transparent;
  animation: pulse-ring 2s infinite;
  opacity: 0.8;
}

.profile-ring::before {
  content: '';
  position: absolute;
  top: -8px;
  left: -8px;
  right: -8px;
  bottom: -8px;
  border: 2px solid;
  border-color: var(--accent-secondary);
  border-radius: 50%;
  background: transparent;
  opacity: 0.6;
  animation: pulse-ring 2s infinite reverse;
}

.profile-ring::after {
  content: '';
  position: absolute;
  top: -16px;
  left: -16px;
  right: -16px;
  bottom: -16px;
  border: 1px solid;
  border-color: var(--accent-tertiary);
  border-radius: 50%;
  background: transparent;
  opacity: 0.4;
  animation: pulse-ring 3s infinite;
}

.profile-image-container {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  overflow: hidden;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 3px solid var(--accent-primary);
  box-shadow: 0 16px 48px var(--glass-shadow);
  position: relative;
  z-index: 2;
}

.profile-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

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

.profile-wrapper:hover .profile-ring {
  border-color: var(--accent-secondary);
  opacity: 1;
  animation-duration: 1s;
}

.profile-wrapper:hover .profile-ring::before {
  border-color: var(--accent-primary);
  opacity: 0.8;
  animation-duration: 1s;
}

.profile-wrapper:hover .profile-ring::after {
  border-color: var(--accent-secondary);
  opacity: 0.6;
  animation-duration: 1.5s;
}
@keyframes pulse-ring {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.05);
    opacity: 0.7;
  }
  100% {
    transform: scale(1.1);
    opacity: 0.3;
  }
}

/* ===== Section Styling ===== */
section {
  position: relative;
  z-index: 1;
}

.section-header {
  margin-bottom: 4rem;
}

.section-divider {
  width: 60px;
  height: 4px;
  background: var(--gradient-primary);
  margin: 0 auto 2rem;
  border-radius: 2px;
}

/* ===== Skills Section ===== */
.skills-grid {
  gap: 1.5rem;
}

.skill-item {
  margin-bottom: 2rem;
}

.skill-icon {
  font-size: 1.5rem;
  width: 24px;
  display: inline-block;
}

.skill-name {
  font-weight: 500;
}

.skill-percentage {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent-primary);
}

.skill-progress {
  height: 8px;
  background: var(--glass-bg);
  border-radius: 4px;
  overflow: hidden;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.skill-progress .progress-bar {
  background: var(--gradient-primary);
  transition: width 1s ease-in-out;
  position: relative;
}

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

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* ===== Projects Section ===== */
.project-card {
  height: 100%;
  transition: var(--transition);
}

.project-image-wrapper {
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius);
  margin-bottom: 1rem;
  aspect-ratio: 16/9;
}

.project-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  opacity: 0;
  transition: var(--transition);
}

.project-card:hover .project-overlay,
.project-card:focus-within .project-overlay {
  opacity: 1;
}

.project-card:hover .project-image,
.project-card:focus-within .project-image {
  transform: scale(1.1);
}

.project-link {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  text-decoration: none;
  transition: var(--transition);
  font-size: 1.2rem;
}

.project-link:hover {
  background: var(--accent-primary);
  color: white;
  transform: scale(1.2);
}

.project-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.project-description {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 0.95rem;
  line-height: 1.5;
}

.project-buttons .btn {
  font-size: 0.9rem;
  padding: 0.5rem 1rem;
}

/* ===== Certificates Section ===== */
.certificate-card {
  transition: var(--transition);
}

.certificate-image-wrapper {
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius);
}

.certificate-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: var(--transition);
}

.certificate-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}

.certificate-card:hover .certificate-overlay,
.certificate-card:focus-within .certificate-overlay {
  opacity: 1;
}

.certificate-card:hover .certificate-image,
.certificate-card:focus-within .certificate-image {
  transform: scale(1.05);
}

/* ===== Contact Section ===== */
.contact-links {
  display: flex;
  flex-direction: column;
}

.contact-link {
  text-decoration: none;
  color: var(--text-primary);
  transition: var(--transition);
  padding: 1rem;
  border-radius: var(--border-radius);
  border: 1px solid transparent;
}

.contact-link:hover,
.contact-link:focus {
  color: var(--text-primary);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-color: var(--glass-border);
  transform: translateX(8px);
}

.contact-icon {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.2rem;
  margin-right: 1rem;
  flex-shrink: 0;
  transition: var(--transition);
}

.contact-link:hover .contact-icon,
.contact-link:focus .contact-icon {
  transform: rotate(360deg);
  background: var(--gradient-secondary);
}

.contact-info h6 {
  margin-bottom: 0.25rem;
  font-weight: 600;
}

/* ===== Footer ===== */
.footer {
  margin-top: 4rem;
  border-top: 1px solid var(--glass-border);
}

.social-links {
  gap: 0.5rem;
}

.social-link {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  text-decoration: none;
  transition: var(--transition);
}

.social-link:hover,
.social-link:focus {
  background: var(--accent-primary);
  color: white;
  transform: translateY(-2px);
}

/* ===== Quick Facts ===== */
.quick-facts {
  display: flex;
  flex-direction: column;
}

.fact-item {
  display: flex;
  align-items: center;
  font-size: 0.95rem;
}

.badge {
  font-size: 0.8rem;
  padding: 0.5rem;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.bg-primary-gradient {
  background: var(--gradient-primary);
}

.bg-success-gradient {
  background: var(--gradient-success);
}

.bg-warning-gradient {
  background: var(--gradient-warning);
}

.bg-info-gradient {
  background: var(--gradient-info);
}

/* ===== Animations ===== */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s ease-out forwards;
}

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

.smooth-scroll {
  scroll-behavior: smooth;
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
  .section-title {
    font-size: 2.25rem;
  }
  
  .profile-wrapper {
    width: 250px;
    height: 250px;
  }
}

@media (max-width: 768px) {
  #webgl-canvas {
    display: none;
  }
  
  .hero-section {
    padding-top: 100px;
    min-height: auto;
    padding-bottom: 4rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .display-3 {
    font-size: 2.5rem;
  }
  
  .profile-wrapper {
    width: 200px;
    height: 200px;
  }
  
  .hero-buttons .btn {
    display: block;
    width: 100%;
    margin-bottom: 0.5rem;
  }
  
  .hero-buttons .btn:last-child {
    margin-bottom: 0;
  }
  
  .skill-item {
    margin-bottom: 1.5rem;
  }
  
  .contact-info {
    display: none;
  }
  
  .contact-icon {
    margin-right: 0;
  }
  
  .quick-facts {
    margin-top: 2rem;
  }
  
  .fact-item {
    justify-content: center;
    text-align: center;
    margin-bottom: 1rem;
  }
}

@media (max-width: 576px) {
  .display-3 {
    font-size: 2rem;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .profile-wrapper {
    width: 180px;
    height: 180px;
  }
  
  .glass-card {
    margin-bottom: 1rem;
  }
  
  .hero-content .lead {
    font-size: 1rem;
  }
  
  .btn {
    padding: 0.6rem 1.5rem;
  }
}

/* ===== Accessibility Enhancements ===== */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .fade-in-up {
    animation: none;
    opacity: 1;
    transform: none;
  }
}

/* Focus indicators for accessibility */
.btn:focus,
.nav-link:focus,
.contact-link:focus,
.social-link:focus,
.project-link:focus {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --glass-bg: rgba(255, 255, 255, 0.15);
    --glass-border: rgba(255, 255, 255, 0.3);
  }
  
  [data-theme="light"] {
    --glass-bg: rgba(0, 0, 0, 0.15);
    --glass-border: rgba(0, 0, 0, 0.3);
  }
}

/* Print styles */
@media print {
  #webgl-canvas,
  .theme-toggle,
  .theme-toggle-footer,
  .navbar {
    display: none !important;
  }
  
  body {
    background: white !important;
    color: black !important;
  }
  
  .glass-card {
    border: 1px solid #ccc !important;
    background: white !important;
  }
}