:root {
  --bg-color: #0f172a;
  --text-color: #e2e8f0;
  --text-secondary: #94a3b8;
  --primary-color: #3b82f6;
  --primary-hover: #2563eb;
  --secondary-bg: #1e293b;
  --card-bg: rgba(30, 41, 59, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);
  --font-main: 'Inter', system-ui, -apple-system, sans-serif;
  --container-width: 1200px;
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
}

ul {
  list-style: none;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

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

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

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.animate-fade-in {
  animation: fadeIn 0.8s ease-out forwards;
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease-out;
}

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

/* Layout */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

section {
  padding: 80px 0;
}

/* Section Title */
.section-title {
  text-align: center;
  margin-bottom: 3rem;
  font-size: 2.5rem;
  font-weight: 800;
  position: relative;
  padding-bottom: 1rem;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(to right, var(--primary-color), #a78bfa);
  border-radius: 2px;
}

/* Header & Nav */
header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(to right, #60a5fa, #a78bfa);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav-links {
  display: flex;
  gap: 30px;
  align-items: center;
}

.nav-links a:not(.btn) {
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
}

.nav-links a:hover:not(.btn) {
  color: var(--primary-color);
}

.nav-links a.active:not(.btn) {
  color: var(--primary-color);
}

.nav-links a:not(.btn)::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--primary-color);
  transition: width 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.burger {
  display: none;
  cursor: pointer;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at top right, rgba(59, 130, 246, 0.1), transparent 40%),
              radial-gradient(circle at bottom left, rgba(167, 139, 250, 0.1), transparent 40%);
  padding-top: 70px;
}

.hero-content {
  text-align: center;
  max-width: 800px;
}

.hero-content h2 {
  font-size: 1.25rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.hero-content h1 {
  font-size: 4rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  line-height: 1.1;
  background: linear-gradient(to right, #f8fafc, #94a3b8);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-content p.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-location {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.hero-location i {
  color: var(--primary-color);
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 2.5rem;
}

.social-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--secondary-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--glass-border);
  transition: all 0.3s ease;
}

.social-icon:hover {
  background: var(--primary-color);
  transform: translateY(-3px);
  border-color: var(--primary-color);
}

.social-icon img {
  width: 20px;
  height: 20px;
  filter: invert(1);
}

.btn {
  display: inline-block;
  padding: 12px 30px;
  border-radius: 50px;
  font-weight: 600;
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
  font-size: 1rem;
}

.btn-primary {
  background: var(--primary-color);
  color: black;
  box-shadow: 0 4px 14px 0 rgba(59, 130, 246, 0.39);
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px 0 rgba(59, 130, 246, 0.5);
}

.btn-outline {
  background: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

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

.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}

/* About Section */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  max-width: 900px;
  margin: 0 auto;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
  line-height: 1.8;
}

.about-highlights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.highlight-item {
  text-align: center;
  padding: 2rem;
  background: var(--card-bg);
  border-radius: 16px;
  border: 1px solid var(--glass-border);
  transition: all 0.3s ease;
}

.highlight-item:hover {
  transform: translateY(-5px);
  border-color: var(--primary-color);
  box-shadow: 0 10px 30px rgba(59, 130, 246, 0.2);
}

.highlight-number {
  font-size: 3rem;
  font-weight: 800;
  background: linear-gradient(to right, var(--primary-color), #a78bfa);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 0.5rem;
}

.highlight-label {
  color: var(--text-secondary);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
}

/* Experience Section - Timeline */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::after {
  content: '';
  position: absolute;
  width: 2px;
  background-color: var(--secondary-bg);
  top: 0;
  bottom: 0;
  left: 20px;
  margin-left: -1px;
}

.timeline-item {
  padding: 10px 40px;
  position: relative;
  background-color: inherit;
  width: 100%;
  margin-bottom: 30px;
}

.timeline-item::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  right: -17px;
  background-color: var(--bg-color);
  border: 4px solid var(--primary-color);
  top: 15px;
  border-radius: 50%;
  z-index: 1;
  left: 12px;
}

.timeline-content {
  padding: 20px 30px;
  background: var(--card-bg);
  position: relative;
  border-radius: 12px;
  border: 1px solid var(--glass-border);
  transition: transform 0.3s ease;
}

.timeline-content:hover {
  transform: translateY(-5px);
  border-color: rgba(59, 130, 246, 0.3);
}

.timeline-date {
  color: var(--primary-color);
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  display: inline-block;
}

.timeline-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.timeline-company {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 1rem;
  font-weight: 500;
}

.timeline-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.timeline-desc ul {
  list-style-type: disc;
  margin-left: 1.5rem;
  margin-top: 0.5rem;
}

/* Skills Section */
.skills-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

.skill-category {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 16px;
  border: 1px solid var(--glass-border);
}

.skill-category h3 {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
  color: var(--text-color);
  border-bottom: 1px solid var(--glass-border);
  padding-bottom: 0.5rem;
}

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

.skill-tag {
  background: rgba(59, 130, 246, 0.15);
  color: var(--primary-color);
  padding: 0.5rem 1rem;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 500;
  border: 1px solid rgba(59, 130, 246, 0.2);
  transition: all 0.3s ease;
  cursor: pointer;
}

.skill-tag:hover {
  background: var(--primary-color);
  color: white;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

/* Projects Section */
.projects-intro {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 3rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.project-category {
  margin-bottom: 4rem;
}

.category-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 2rem;
  color: var(--text-color);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--glass-border);
}

.category-title i {
  color: var(--primary-color);
  font-size: 1.5rem;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.project-card {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 16px;
  border: 1px solid var(--glass-border);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.3);
  border-color: var(--primary-color);
}

.project-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: linear-gradient(135deg, var(--primary-color), #a78bfa);
  color: white;
  padding: 0.4rem 1rem;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.project-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-color);
  line-height: 1.3;
}

.project-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1rem;
  line-height: 1.6;
  flex-grow: 1;
}

.project-tech {
  background: rgba(59, 130, 246, 0.05);
  padding: 0.75rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  border-left: 3px solid var(--primary-color);
}

.project-tech strong {
  color: var(--primary-color);
  display: block;
  margin-bottom: 0.25rem;
}

/* Mini Projects */
.mini-projects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.mini-project-card {
  background: var(--card-bg);
  padding: 1.5rem;
  border-radius: 12px;
  border: 1px solid var(--glass-border);
  transition: all 0.3s ease;
}

.mini-project-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-color);
  box-shadow: 0 10px 25px rgba(59, 130, 246, 0.15);
}

.mini-project-card h5 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-color);
}

.mini-project-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
  line-height: 1.5;
}

.mini-tag {
  display: inline-block;
  background: rgba(59, 130, 246, 0.15);
  color: var(--primary-color);
  padding: 0.3rem 0.75rem;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid rgba(59, 130, 246, 0.2);
}

/* Education Section */
.education-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  max-width: 900px;
  margin: 0 auto 4rem;
}

.education-card {
  display: flex;
  gap: 1.5rem;
  padding: 2rem;
  background: var(--card-bg);
  border-radius: 16px;
  border: 1px solid var(--glass-border);
  transition: all 0.3s ease;
}

.education-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-color);
  box-shadow: 0 10px 30px rgba(59, 130, 246, 0.2);
}

.education-icon {
  width: 60px;
  height: 60px;
  min-width: 60px;
  border-radius: 12px;
  background: rgba(59, 130, 246, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--primary-color);
}

.education-content {
  flex: 1;
}

.education-degree {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-color);
}

.education-school {
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  font-size: 1rem;
}

.education-year {
  color: var(--primary-color);
  font-weight: 600;
  font-size: 0.9rem;
}

.internship-section {
  max-width: 900px;
  margin: 0 auto;
}

.internship-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--text-color);
}

.internship-card {
  padding: 2rem;
  background: var(--card-bg);
  border-radius: 16px;
  border: 1px solid var(--glass-border);
  transition: all 0.3s ease;
}

.internship-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-color);
  box-shadow: 0 10px 30px rgba(59, 130, 246, 0.2);
}

.internship-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.internship-header h4 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-color);
}

.internship-date {
  color: var(--primary-color);
  font-weight: 600;
  font-size: 0.9rem;
}

.internship-company {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-weight: 500;
}

.internship-desc {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Contact Section */
.contact-section {
  text-align: center;
  background: linear-gradient(to top, #1e293b, transparent);
}

.contact-box {
  background: var(--card-bg);
  padding: 3rem;
  border-radius: 20px;
  max-width: 700px;
  margin: 0 auto;
  border: 1px solid var(--glass-border);
}

.contact-label {
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-size: 1.1rem;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.contact-item {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 1rem;
  background: rgba(59, 130, 246, 0.05);
  border-radius: 12px;
  transition: all 0.3s ease;
}

.contact-item:hover {
  background: rgba(59, 130, 246, 0.1);
  transform: translateX(5px);
}

.contact-item i {
  font-size: 1.25rem;
  color: var(--primary-color);
  width: 24px;
}

.contact-link {
  color: var(--text-color);
  font-size: 1.1rem;
  text-decoration: none;
  transition: color 0.3s ease;
}

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

.contact-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem 0;
  border-top: 1px solid var(--glass-border);
  color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
  .hero-content h1 {
    font-size: 2.5rem;
  }

  .hero-content p.hero-subtitle {
    font-size: 1rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .nav-links {
    display: none;
  }

  .burger {
    display: block;
    color: var(--text-color);
    font-size: 1.5rem;
  }

  .about-highlights {
    grid-template-columns: 1fr;
  }

  .highlight-number {
    font-size: 2.5rem;
  }

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

  .timeline-item {
    padding: 10px 30px;
  }

  .timeline-item::after {
    left: 2px;
  }

  .skills-container {
    grid-template-columns: 1fr;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .mini-projects {
    grid-template-columns: 1fr;
  }

  .category-title {
    font-size: 1.5rem;
  }

  .project-badge {
    font-size: 0.7rem;
    padding: 0.3rem 0.75rem;
  }

  .projects-intro {
    font-size: 1rem;
    margin-bottom: 2rem;
  }

  .education-container {
    grid-template-columns: 1fr;
  }

  .education-card {
    flex-direction: column;
    text-align: center;
  }

  .education-icon {
    margin: 0 auto;
  }

  .contact-box {
    padding: 2rem;
  }

  .contact-item {
    flex-direction: column;
    text-align: center;
  }

  .contact-link {
    font-size: 1rem;
  }

  .cta-buttons,
  .contact-buttons {
    flex-direction: column;
    width: 100%;
  }

  .cta-buttons .btn,
  .contact-buttons .btn {
    width: 100%;
  }

  .internship-header {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 2rem;
  }

  .section-title {
    font-size: 1.75rem;
  }

  section {
    padding: 60px 0;
  }

  .project-card {
    padding: 1.5rem;
  }

  .project-title {
    font-size: 1.2rem;
  }

  .category-title {
    font-size: 1.35rem;
    flex-direction: column;
    align-items: flex-start;
  }

  .project-tech {
    font-size: 0.8rem;
  }

  .mini-project-card {
    padding: 1.25rem;
  }
}