:root {
  /* Premium Greenish Color Palette */
  --bg-color: #f7faf9;
  --bg-secondary: #ecfdf5;
  --text-primary: #064e3b;
  --text-secondary: #374151;
  --text-tertiary: #6b7280;

  /* Primary Accent - Emerald/Forest Gradient */
  --primary-color: #10b981;
  --primary-gradient: linear-gradient(135deg, #065f46 0%, #10b981 100%);
  --primary-soft: rgba(16, 185, 129, 0.08);

  /* Accent for highlights */
  --accent-color: #34d399;
  --accent-soft: rgba(16, 185, 129, 0.1);

  /* UI Elements */
  --border-color: rgba(6, 78, 59, 0.08);
  --border-hover: #10b981;
  --card-bg: #ffffff;
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.02);
  --shadow-lg: 0 20px 40px -10px rgba(6, 78, 59, 0.1);
  --shadow-hover: 0 30px 60px -15px rgba(6, 78, 59, 0.2);

  --radius-sm: 0.8rem;
  --radius-md: 1.2rem;
  --radius-lg: 2rem;
  --radius-full: 9999px;

  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-serif: 'Fraunces', serif;

  --header-height: 90px;
  --transition-smooth: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base Styles */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-secondary);
  line-height: 1.8;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition-smooth);
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

/* Scroll Progress Bar */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 4px;
  background: var(--primary-gradient);
  z-index: 2000;
}

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

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

::-webkit-scrollbar-thumb {
  background: #ccd7d2;
  border-radius: 10px;
  border: 3px solid var(--bg-color);
}

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

/* Custom Cursor */
.cursor-dot,
.cursor-outline {
  position: fixed;
  top: 0;
  left: 0;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  z-index: 9999;
  pointer-events: none;
}

.cursor-dot {
  width: 6px;
  height: 6px;
  background-color: var(--primary-color);
}

.cursor-outline {
  width: 35px;
  height: 35px;
  border: 1.5px solid var(--primary-color);
  opacity: 0.3;
  transition: transform 0.1s ease-out;
}

@media (max-width: 768px) {

  .cursor-dot,
  .cursor-outline {
    display: none;
  }
}

/* Utilities */
.container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 2.5rem;
}

.ml-container {
  max-width: 1000px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2.25rem;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.95rem;
  transition: var(--transition-smooth);
  cursor: pointer;
  border: none;
  gap: 0.75rem;
  letter-spacing: 0.01em;
}

.btn:active {
  transform: scale(0.96);
}

.btn-primary {
  background: var(--primary-gradient);
  color: #fff;
  box-shadow: 0 10px 25px -5px rgba(16, 185, 129, 0.4);
}

.btn-primary:hover {
  transform: translateY(-4px);
  box-shadow: 0 15px 35px -5px rgba(16, 185, 129, 0.5);
}

.btn-secondary {
  background: white;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--primary-color);
  background: var(--bg-secondary);
  color: var(--primary-color);
  transform: translateY(-4px);
}

.section {
  padding: 10rem 0;
  position: relative;
}

.section-badge {
  display: inline-block;
  padding: 0.6rem 1.4rem;
  background: var(--accent-soft);
  color: var(--primary-color);
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  border-radius: var(--radius-full);
  margin-bottom: 2rem;
  border: 1px solid rgba(16, 185, 129, 0.1);
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  margin-bottom: 4rem;
  color: var(--text-primary);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

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

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

/* Animations */
.hidden-element {
  opacity: 0;
  transform: translateY(50px);
  transition: opacity 1.2s cubic-bezier(0.2, 0, 0.2, 1), transform 1.2s cubic-bezier(0.2, 0, 0.2, 1);
}

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

.delay-100 {
  transition-delay: 150ms;
}

.delay-200 {
  transition-delay: 300ms;
}

.delay-300 {
  transition-delay: 450ms;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(247, 250, 249, 0.7);
  backdrop-filter: blur(25px);
  -webkit-backdrop-filter: blur(25px);
  border-bottom: 1px solid rgba(16, 185, 129, 0.05);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.site-header.scrolled {
  height: 70px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
}

.header-content {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: height 0.4s ease;
}

.site-header.scrolled .header-content {
  height: 70px;
}

.logo {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 2.25rem;
  letter-spacing: -0.05em;
  color: var(--text-primary);
  position: relative;
  display: flex;
  align-items: center;
}

.logo::after {
  content: '';
  width: 10px;
  height: 10px;
  background: var(--primary-color);
  border-radius: 50%;
  margin-left: 4px;
  margin-top: 10px;
}

.desktop-nav .nav-link {
  margin-left: 3rem;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--text-secondary);
  position: relative;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.desktop-nav .nav-link:hover,
.desktop-nav .nav-link.active {
  color: var(--text-primary);
}

.desktop-nav .nav-link::before {
  content: '';
  position: absolute;
  width: 6px;
  height: 6px;
  background: var(--primary-color);
  border-radius: 50%;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%) scale(0);
  transition: var(--transition-smooth);
}

.desktop-nav .nav-link.active::before {
  transform: translateX(-50%) scale(1);
}

/* Mobile Menu Button */
.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 16px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 2000;
}

.bar {
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  transition: var(--transition-smooth);
  border-radius: 4px;
}

.mobile-toggle.active .bar:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-toggle.active .bar:nth-child(2) {
  opacity: 0;
}

.mobile-toggle.active .bar:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: var(--bg-color);
  z-index: 1500;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-20px);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-menu.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.mobile-menu nav {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  text-align: center;
}

.mobile-link {
  font-size: 2.5rem;
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--text-primary);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 100px;
  position: relative;
  overflow: hidden;
  background: radial-gradient(circle at 80% 20%, rgba(16, 185, 129, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 10% 80%, rgba(16, 185, 129, 0.03) 0%, transparent 40%);
}

/* Background Abstract Blob */
.hero::before {
  content: '';
  position: absolute;
  top: -10%;
  right: -5%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.08) 0%, rgba(255, 255, 255, 0) 70%);
  border-radius: 50%;
  z-index: -1;
}

.hero-container {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 8rem;
  align-items: center;
}

.eyebrow {
  display: block;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 1.5rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-size: 0.8rem;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(3rem, 6vw, 4.5rem);
  line-height: 1.05;
  margin-bottom: 2rem;
  color: var(--text-primary);
  margin-top: 1rem;
}

.hero-bio {
  font-size: 1.35rem;
  color: var(--text-secondary);
  margin-bottom: 4rem;
  max-width: 600px;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: 1.5rem;
}

.hero-stats {
  margin-top: 6rem;
  padding-top: 3rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: 5rem;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-num {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Hero Image & Graphics */
.hero-image {
  position: relative;
  display: flex;
  justify-content: center;
}

.image-wrapper {
  position: relative;
  width: 460px;
  height: 580px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: white;
  transition: var(--transition-smooth);
}

.image-wrapper::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 60%, rgba(6, 78, 59, 0.4));
  z-index: 1;
}

.image-wrapper:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: var(--shadow-hover);
}

.profile-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(120deg, #e0e7ff, #f9fafb);
  color: #4f46e5;
  font-size: 4rem;
  font-weight: 700;
  font-family: var(--font-serif);
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(10%) contrast(105%);
}

.floating-card {
  position: absolute;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(15px);
  padding: 1.5rem 2rem;
  border-radius: 1.5rem;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 1.25rem;
  z-index: 10;
  border: 1px solid rgba(255, 255, 255, 0.5);
  transition: var(--transition-smooth);
}

.card-1 {
  top: 15%;
  left: -60px;
  animation: float 6s ease-in-out infinite;
}

.card-2 {
  bottom: 15%;
  right: -50px;
  animation: float 8s ease-in-out infinite reverse;
}

.floating-card .icon {
  font-size: 1.75rem;
}

.floating-card p {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
  margin: 0;
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: -100px;
  left: 0;
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-tertiary);
  animation: fadeIn 1s 2s both;
}

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

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

.mouse {
  width: 20px;
  height: 35px;
  border: 2px solid var(--border-color);
  border-radius: 10px;
  position: relative;
}

.mouse::before {
  content: '';
  position: absolute;
  width: 3px;
  height: 6px;
  background: var(--primary-color);
  left: 50%;
  transform: translateX(-50%);
  top: 6px;
  border-radius: 2px;
  animation: scrollMouse 2s infinite;
}

@keyframes scrollMouse {
  0% {
    transform: translate(-50%, 0);
    opacity: 1;
  }

  100% {
    transform: translate(-50%, 15px);
    opacity: 0;
  }
}

/* Responsive adjustment for scroll indicator */
@media (max-width: 1024px) {
  .scroll-indicator {
    position: relative;
    bottom: auto;
    justify-content: center;
    margin-top: 3rem;
  }
}

/* About Section */
.about-section {
  background: white;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10rem;
  align-items: start;
}

.highlight {
  color: var(--primary-color);
  font-weight: 700;
}

.about-content p {
  margin-bottom: 2.5rem;
  font-size: 1.2rem;
}

.skills-wrapper {
  margin-top: 3.5rem;
}

.skills-wrapper h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1.5rem;
  color: var(--text-tertiary);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.tag {
  padding: 0.75rem 1.5rem;
  background: white;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

.tag:hover {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.tools-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.tool-card {
  background: white;
  padding: 2.5rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.tool-card:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
  transform: scale(1.02);
}

.tool-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.tool-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
}


/* Experience Section */
.experience-section {
  background: #f8faf9;
  background-image: radial-gradient(rgba(16, 185, 129, 0.05) 1.5px, transparent 1.5px);
  background-size: 30px 30px;
}

.timeline {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
}

.timeline::before {
  left: 20px;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary-color), transparent);
}

.timeline-item {
  padding-left: 5rem;
  margin-bottom: 6rem;
}

/* Timeline dot */
.timeline-item::after {
  left: 14px;
  top: 10px;
  width: 14px;
  height: 14px;
  border: 4px solid white;
  box-shadow: 0 0 0 4px var(--primary-soft);
}

.timeline-item.active::after {
  background: var(--primary-color);
}

.timeline-date {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 0.75rem;
  display: inline-block;
  font-size: 1.1rem;
}

.timeline-content {
  background: white;
  padding: 3.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.timeline-content:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-5px);
}

.timeline-content h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  font-family: var(--font-serif);
}

.timeline-content .company {
  font-size: 1rem;
  color: var(--text-tertiary);
  font-weight: 600;
  margin-bottom: 1.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.duties {
  list-style-type: disc;
  padding-left: 1.2rem;
}

.duties li {
  font-size: 1.05rem;
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
  position: relative;
  padding-left: 1.5rem;
}

.duties li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: 700;
}


/* Projects Section */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2.5rem;
}

.project-card {
  padding: 4rem;
  border-radius: 2.5rem;
  background: #ffffff;
  border: 1px solid var(--border-color);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  background: var(--text-primary);
  border-color: var(--text-primary);
  transform: translateY(-15px) rotate(1deg);
}

.project-card:hover * {
  color: white !important;
}

.project-category {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--primary-color);
  font-weight: 800;
  margin-bottom: 1.5rem;
}

.project-card h3 {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
  line-height: 1.25;
}

.project-card p {
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  font-size: 1rem;
  line-height: 1.7;
}

.project-meta {
  margin-top: auto;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-tertiary);
  display: flex;
  align-items: center;
}


/* Research Section Improvements */
.research-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.research-item {
  display: grid;
  grid-template-columns: auto 1.5fr auto;
  align-items: center;
  gap: 3.5rem;
  padding: 3rem 4rem;
  background: white;
  border-radius: 2rem;
  border: 1px solid var(--border-color);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.research-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 6px;
  height: 100%;
  background: var(--primary-color);
  transform: scaleY(0);
  transition: var(--transition-smooth);
}

.research-item:hover {
  transform: translateX(10px);
  border-color: var(--primary-color);
}

.research-item:hover::before {
  transform: scaleY(1);
}

.research-year {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary-color);
  opacity: 0.6;
}

.research-info h3 {
  font-size: 1.4rem;
  line-height: 1.3;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.research-info p {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.research-icon {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  border-radius: 50%;
  color: var(--primary-color);
  font-size: 1.25rem;
  transition: var(--transition-smooth);
}

.research-item:hover .research-icon {
  background: var(--primary-color);
  color: white;
  transform: rotate(-45deg);
}

@media (max-width: 900px) {
  .research-item {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 1.5rem;
    padding: 2.5rem;
  }

  .research-icon {
    margin: 0 auto;
  }
}


/* Contact Section */
.contact-section {
  position: relative;
  padding-bottom: 10rem;
  background: white;
}

.contact-box {
  padding: 8rem 5rem;
  border-radius: 4rem;
  background: var(--primary-gradient);
  color: #fff;
  text-align: center;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.contact-box::before {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  background: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 86c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zm76-78c.552 0 1-.448 1-1s-.448-1-1-1-1 .448-1 1 .448-1 1-1zm-6 73c.552 0 1-.448 1-1s-.448-1-1-1-1 .448-1 1 .448-1 1-1zm-78-4c.552 0 1-.448 1-1s-.448-1-1-1-1 .448-1 1 .448-1 1-1zm78-44c.552 0 1-.448 1-1s-.448-1-1-1-1 .448-1 1 .448-1 1-1zm-56 88c.552 0 1-.448 1-1s-.448-1-1-1-1 .448-1 1 .448-1 1-1zm0-34c.552 0 1-.448 1-1s-.448-1-1-1-1 .448-1 1 .448-1 1-1zM24 42c.552 0 1-.448 1-1s-.448-1-1-1-1 .448-1 1 .448-1 1-1zm44-20c.552 0 1-.448 1-1s-.448-1-1-1-1 .448-1 1 .448-1 1-1z' fill='%23ffffff' fill-opacity='0.05' fill-rule='evenodd'/%3E%3C/svg%3E");
  z-index: 1;
}

.contact-box h2 {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 5vw, 4rem);
  margin-bottom: 1.5rem;
  position: relative;
  z-index: 2;
}

.contact-box p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 4rem;
  font-size: 1.25rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  z-index: 2;
}

.big-btn {
  font-size: 1.75rem;
  padding: 1.75rem 4.5rem;
  border-radius: 2rem;
  text-transform: none;
  letter-spacing: -0.01em;
  background: #fff;
  color: var(--text-primary);
  margin-bottom: 4rem;
  position: relative;
  z-index: 2;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.big-btn:hover {
  background: var(--bg-secondary);
  transform: translateY(-5px);
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  position: relative;
  z-index: 2;
}

.social-links a {
  font-weight: 700;
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.9);
  border-bottom: 2px solid transparent;
}

.social-links a:hover {
  color: white;
  border-color: white;
}


/* Footer */
.site-footer {
  padding: 6rem 0;
  border-top: 1px solid var(--border-color);
  background: var(--bg-color);
}

.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.copyright {
  font-size: 1rem;
  letter-spacing: 0.02em;
  font-weight: 600;
  color: var(--text-tertiary);
}

.back-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: var(--primary-soft);
  border-radius: var(--radius-full);
  font-weight: 700;
  color: var(--primary-color);
}

.back-link:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-5px);
}


/* Responsiveness */
@media (max-width: 1200px) {
  .container {
    padding: 0 2rem;
  }

  .hero-container,
  .about-grid {
    gap: 4rem;
  }
}

@media (max-width: 1024px) {

  .hero-container,
  .about-grid {
    grid-template-columns: 1fr;
    gap: 4rem;
    text-align: center;
  }

  .hero-bio,
  .contact-box p {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
    gap: 3rem;
  }

  .hero-image {
    order: -1;
  }

  .image-wrapper {
    margin: 0 auto;
    width: 400px;
    height: 500px;
  }

  .card-1 {
    left: -20px;
  }

  .card-2 {
    right: -20px;
  }

  .tool-card:hover {
    transform: none;
  }
}

@media (max-width: 768px) {
  .desktop-nav {
    display: none;
  }

  .mobile-toggle {
    display: flex;
  }

  .section {
    padding: 6rem 0;
  }

  .stat-num {
    font-size: 1.5rem;
  }

  .hero-title {
    font-size: 3rem;
  }

  .contact-box {
    padding: 4rem 2rem;
    border-radius: 2rem;
  }

  .research-item {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
    padding: 2rem;
  }

  .timeline-item {
    padding-left: 3rem;
  }

  .timeline::before {
    left: 10px;
  }

  .timeline-item::after {
    left: 4px;
  }

  .timeline-content {
    padding: 2.5rem;
  }

  .project-card {
    padding: 3rem;
  }

  .research-item {
    padding: 2rem;
    gap: 2rem;
  }

  .btn {
    width: 100%;
  }

  .hero-cta {
    flex-direction: column;
  }

  .hero-stats {
    flex-wrap: wrap;
  }
}

.no-scroll {
  overflow: hidden;
}

@media (max-width: 600px) {
  .header-content {
    padding: 0;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .image-wrapper {
    width: 100%;
    height: 400px;
  }

  .floating-card {
    padding: 0.75rem 1rem;
    transform: scale(0.9);
  }

  .research-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .research-icon {
    display: none;
  }

  .contact-box h2 {
    font-size: 2rem;
  }

  .big-btn {
    font-size: 1rem;
    padding: 1rem 1.5rem;
    width: 100%;
  }

  .footer-row {
    flex-direction: column;
    gap: 1rem;
  }
}