/* ==================== */
/* Design System        */
/* ==================== */

:root {
  /* Unified Blue Theme - Clean & Professional */
  --color-bg-primary: #0a0f1e;
  --color-bg-secondary: #0f1419;
  --color-bg-tertiary: #151a24;

  /* Blue Accent Colors */
  --color-accent-primary: #0a84ff;
  --color-accent-light: #64a8ff;
  --color-accent-dark: #0066cc;
  --color-accent-glow: rgba(10, 132, 255, 0.5);

  /* Text Colors - Improved Contrast */
  --color-text-primary: #ffffff;
  --color-text-secondary: #d1d5db;
  --color-text-muted: #9ca3af;

  /* Apple-Inspired Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-bg-hover: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-backdrop-blur: blur(40px);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);

  /* Gradients - Blue Focus */
  --gradient-primary: linear-gradient(135deg, #0a84ff 0%, #0066cc 100%);
  --gradient-accent: linear-gradient(135deg, #64a8ff 0%, #0a84ff 100%);
  --gradient-subtle: linear-gradient(135deg, rgba(10, 132, 255, 0.1) 0%, rgba(100, 168, 255, 0.05) 100%);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Outfit', sans-serif;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;

  /* Animation */
  --transition-fast: 0.2s ease;
  --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);

  /* Shadows - Apple Style */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 40px var(--color-accent-glow);
}

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

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

body {
  font-family: var(--font-primary);
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Clean Blue Background */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(circle at 20% 40%, rgba(10, 132, 255, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(100, 168, 255, 0.1) 0%, transparent 50%);
  z-index: -1;
  animation: pulseGlow 20s ease-in-out infinite;
}

@keyframes pulseGlow {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.7;
  }
}

/* ==================== */
/* Typography           */
/* ==================== */

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2.5rem, 8vw, 5rem);
  color: rgba(255, 255, 255, 0.95);
  text-shadow:
    0 0 40px rgba(255, 255, 255, 0.3),
    0 2px 4px rgba(0, 0, 0, 0.2);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--color-accent-primary);
}

p {
  font-size: clamp(1rem, 2vw, 1.125rem);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
}

a {
  color: var(--color-accent-primary);
  text-decoration: none;
  transition: var(--transition-smooth);
  position: relative;
}

a:hover {
  color: var(--color-accent-light);
}

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

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

section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--spacing-xl) 0;
}

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

#hero {
  position: relative;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-xl);
  width: 100%;
  z-index: 2;
}

.hero-main-text {
  flex: 1.2;
  text-align: left;
}

.hero-image {
  flex: 0.8;
  display: flex;
  justify-content: center;
  align-items: center;
  animation: fadeInRight 1s ease-out 0.6s backwards;
}

.profile-frame {
  position: relative;
  width: min(350px, 80vw);
  aspect-ratio: 1;
  border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  background: var(--gradient-primary);
  padding: 5px;
  animation: morphProfile 8s ease-in-out infinite;
  box-shadow: 0 0 50px rgba(10, 132, 255, 0.3);
}

.profile-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: inherit;
  border: 4px solid var(--color-bg-primary);
}

@keyframes morphProfile {
  0% {
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  }

  50% {
    border-radius: 70% 30% 30% 70% / 70% 70% 30% 30%;
  }

  100% {
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  }
}

.hero-title {
  margin-bottom: var(--spacing-sm);
  animation: fadeInUp 1s ease-out 0.2s backwards;
}

.hero-subtitle {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 1s ease-out 0.4s backwards;
}

.hero-description {
  max-width: 700px;
  font-size: clamp(1rem, 2vw, 1.125rem);
  line-height: 1.8;
  margin-bottom: var(--spacing-lg);
  animation: fadeInUp 1s ease-out 0.6s backwards;
}

@media (max-width: 992px) {
  #hero {
    min-height: auto;
    padding: 120px 0 60px;
  }

  .hero-content {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-xl);
  }

  .hero-main-text {
    text-align: center;
    order: 2;
  }

  .hero-image {
    order: 1;
  }

  .hero-description {
    margin: 0 auto var(--spacing-lg);
  }

  .profile-frame {
    width: min(280px, 70vw);
  }
}

.cta-button {
  display: inline-block;
  padding: 1rem 2.5rem;
  background: var(--gradient-primary);
  color: white;
  font-weight: 600;
  font-size: 1.125rem;
  border-radius: 50px;
  cursor: pointer;
  transition: var(--transition-smooth);
  animation: fadeInUp 1s ease-out 0.8s backwards;
  box-shadow: 0 8px 24px rgba(10, 132, 255, 0.4);
  position: relative;
  overflow: hidden;
}

.cta-button::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 ease;
}

.cta-button:hover::before {
  left: 100%;
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(10, 132, 255, 0.6);
  color: white;
}

/* Floating Animation for decorative elements */
.floating-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.3;
  animation: float 20s ease-in-out infinite;
}

.orb-1 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--color-accent-primary), var(--color-accent-dark));
  top: 10%;
  left: 10%;
  animation-delay: 0s;
}

.orb-2 {
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, var(--color-accent-light), var(--color-accent-primary));
  bottom: 20%;
  right: 15%;
  animation-delay: 5s;
}

@keyframes float {

  0%,
  100% {
    transform: translate(0, 0) rotate(0deg);
  }

  33% {
    transform: translate(30px, -50px) rotate(120deg);
  }

  66% {
    transform: translate(-20px, 20px) rotate(240deg);
  }
}

/* ==================== */
/* About Section        */
/* ==================== */

#about {
  background: var(--color-bg-secondary);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

.about-text {
  animation: fadeInLeft 1s ease-out;
}

.about-text p {
  margin-bottom: var(--spacing-md);
  line-height: 1.8;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
  animation: fadeInRight 1s ease-out;
}

.stat-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop-blur);
  -webkit-backdrop-filter: var(--glass-backdrop-blur);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: var(--spacing-md);
  text-align: center;
  min-height: 160px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  transition: var(--transition-smooth);
  box-shadow: var(--glass-shadow);
  position: relative;
  overflow: hidden;
}



.stat-card:hover {
  transform: translateY(-5px);
  border-color: rgba(10, 132, 255, 0.3);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4), var(--shadow-glow);
  background: var(--glass-bg-hover);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ==================== */
/* Experience Section   */
/* ==================== */

#experience {
  background: var(--color-bg-primary);
}

.experience-timeline {
  position: relative;
  padding-left: 50px;
  margin-top: var(--spacing-lg);
}

.experience-timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--gradient-accent);
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: var(--spacing-lg);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop-blur);
  -webkit-backdrop-filter: var(--glass-backdrop-blur);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: var(--spacing-md);
  transition: var(--transition-smooth);
  animation: fadeInRight 1s ease-out;
  box-shadow: var(--glass-shadow);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -58px;
  top: 30px;
  width: 14px;
  height: 14px;
  background: var(--color-accent-primary);
  border-radius: 50%;
  border: 3px solid var(--color-bg-primary);
  box-shadow: 0 0 20px var(--color-accent-glow);
  transition: var(--transition-smooth);
}

.timeline-item:hover::before {
  transform: scale(1.2);
  box-shadow: 0 0 30px rgba(10, 132, 255, 1);
}

.timeline-item:hover {
  transform: translateX(10px);
  border-color: rgba(10, 132, 255, 0.3);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
  background: var(--glass-bg-hover);
}

.timeline-company {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent-primary);
  margin-bottom: var(--spacing-xs);
}

.timeline-role {
  font-size: 1.125rem;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-xs);
}

.timeline-period {
  position: absolute;
  left: -120px;
  top: 25px;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  font-weight: 600;
  text-align: right;
  width: 60px;
}

.timeline-description {
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* ==================== */
/* Publications Section */
/* ==================== */

#publications {
  background: var(--color-bg-secondary);
}

.publications-content {
  text-align: center;
}

.publication-highlight {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop-blur);
  -webkit-backdrop-filter: var(--glass-backdrop-blur);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  padding: var(--spacing-lg);
  max-width: 800px;
  margin: var(--spacing-lg) auto;
  transition: var(--transition-smooth);
  box-shadow: var(--glass-shadow);
  position: relative;
  overflow: hidden;
}

.publication-highlight::before {
  content: '';
  position: absolute;
  inset: -2px;
  background: var(--gradient-primary);
  border-radius: 32px;
  opacity: 0;
  transition: var(--transition-smooth);
  z-index: -1;
}

.publication-highlight:hover::before {
  opacity: 0.4;
}

.publication-highlight:hover {
  transform: translateY(-5px);
  border-color: rgba(10, 132, 255, 0.3);
  box-shadow: 0 16px 50px rgba(0, 0, 0, 0.5), var(--shadow-glow);
  background: var(--glass-bg-hover);
}

.publication-count {
  font-size: 4rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
  margin-bottom: var(--spacing-sm);
}

.publication-description {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
}

.scholar-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 1rem 2rem;
  background: var(--gradient-primary);
  color: white;
  font-weight: 600;
  border-radius: 50px;
  transition: var(--transition-smooth);
  box-shadow: 0 8px 24px rgba(10, 132, 255, 0.4);
  position: relative;
  overflow: hidden;
}

.scholar-link::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 ease;
}

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

.scholar-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(10, 132, 255, 0.6);
  color: white;
}

.publication-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  max-width: 900px;
  margin: var(--spacing-lg) auto;
  text-align: left;
}

.pub-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop-blur);
  -webkit-backdrop-filter: var(--glass-backdrop-blur);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: var(--spacing-md);
  transition: var(--transition-smooth);
  box-shadow: var(--glass-shadow);
  position: relative;
}

.pub-card:hover {
  transform: translateY(-5px);
  border-color: rgba(10, 132, 255, 0.3);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
  background: var(--glass-bg-hover);
}

.pub-year {
  font-size: 0.7em;
  color: var(--color-accent-light);
  margin-left: 4px;
}

.pub-title {
  font-size: 1.25rem;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-xs);
  line-height: 1.4;
}

.pub-authors {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xs);
}

.pub-venue {
  font-size: 0.95rem;
  color: var(--color-accent-light);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.pub-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-accent-primary);
  text-decoration: none;
  display: inline-block;
  margin-top: var(--spacing-xs);
}

.pub-link:hover {
  color: var(--color-accent-light);
  text-decoration: underline;
}

.view-more {
  margin-top: var(--spacing-lg);
}

/* ==================== */
/* Contact Section      */
/* ==================== */

/* ==================== */
/* Video Section        */
/* ==================== */

#videos {
  background: var(--color-bg-primary);
  text-align: center;
}

.video-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  max-width: 900px;
  margin: var(--spacing-lg) auto;
}

.video-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop-blur);
  -webkit-backdrop-filter: var(--glass-backdrop-blur);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: var(--spacing-md);
  text-decoration: none;
  transition: var(--transition-smooth);
  box-shadow: var(--glass-shadow);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  text-align: left;
  position: relative;
  overflow: hidden;
}

.video-card:hover {
  border-color: rgba(10, 132, 255, 0.3);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
  background: var(--glass-bg-hover);
}

.video-thumbnail {
  position: relative;
  width: 320px;
  flex-shrink: 0;
  aspect-ratio: 16 / 9;
  border-radius: 12px;
  overflow: hidden;
  display: block;
}

.video-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-smooth);
}

.video-thumbnail:hover img {
  transform: scale(1.1);
}

.play-button {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 36px;
  height: 36px;
  background: rgba(10, 132, 255, 0.9);
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  color: white;
  font-size: 0.9rem;
  opacity: 1;
  transition: var(--transition-smooth);
  z-index: 2;
  box-shadow: 0 0 15px rgba(10, 132, 255, 0.5);
}

.video-thumbnail:hover .play-button {
  background: var(--color-accent-primary);
  transform: translate(-50%, -50%) scale(1.1);
  box-shadow: 0 0 20px rgba(10, 132, 255, 0.8);
}

.video-info {
  flex: 1;
}

.video-title {
  font-size: 1.3rem;
  color: var(--color-text-primary);
  margin-bottom: 0;
  line-height: 1.4;
  font-weight: 700;
}

#contact {
  background: var(--color-bg-primary);
  text-align: center;
  padding-bottom: 80px;
  /* Ensure space for social links */
}

.contact-content h2 {
  margin-bottom: var(--spacing-sm);
}

.contact-content p {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-lg);
}

.social-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.social-link {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop-blur);
  -webkit-backdrop-filter: var(--glass-backdrop-blur);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  font-size: 1.5rem;
  transition: var(--transition-smooth);
  box-shadow: var(--glass-shadow);
  position: relative;
}

.social-link::before {
  content: '';
  position: absolute;
  inset: -2px;
  background: var(--gradient-primary);
  border-radius: 50%;
  opacity: 0;
  transition: var(--transition-smooth);
  z-index: -1;
}

.social-link:hover::before {
  opacity: 1;
}

.social-link:hover {
  background: var(--color-accent-primary);
  border-color: var(--color-accent-primary);
  transform: translateY(-5px) rotate(360deg);
  box-shadow: 0 8px 24px rgba(10, 132, 255, 0.6);
}

/* ==================== */
/* 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);
  }
}

/* ==================== */
/* Scroll Reveal        */
/* ==================== */

.reveal {
  opacity: 0;
  transform: translateY(50px);
  transition: all 0.8s ease-out;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 768px) {
  .reveal {
    opacity: 1;
    /* Safety fallback for mobile */
    transform: none;
    transition: none;
  }
}

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

@media (max-width: 768px) {
  section {
    min-height: auto;
    padding: var(--spacing-lg) 0;
  }

  .about-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
  }

  .experience-timeline {
    padding-left: 30px;
  }

  .timeline-item::before {
    left: -36px;
  }
}

/* ==================== */
/* Smooth Scrolling     */
/* ==================== */

html {
  scroll-behavior: smooth;
}

@media (max-width: 768px) {
  .video-card {
    flex-direction: column;
    align-items: flex-start;
  }

  .video-thumbnail {
    width: 100%;
  }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--gradient-primary);
  border-radius: 10px;
  border: 2px solid var(--color-bg-primary);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gradient-accent);
  box-shadow: 0 0 10px rgba(10, 132, 255, 0.5);
}