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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #ffffff;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 1000;
  padding: 0.9rem 0;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.08);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo a {
  font-size: 1.6rem;
  font-weight: 800;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  letter-spacing: -0.5px;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 0.25rem;
}

.nav-link {
  color: #4b5563;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.4rem 0.85rem;
  border-radius: 8px;
  transition: color 0.2s ease, background 0.2s ease;
  position: relative;
}

.nav-link:hover {
  color: #2563eb;
  background: rgba(37, 99, 235, 0.07);
}

.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #2563eb, #7c3aed);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.nav-link:hover::after {
  width: 60%;
}

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 5px;
  padding: 4px;
}

.bar {
  width: 22px;
  height: 2px;
  background-color: #374151;
  border-radius: 2px;
  transition: 0.3s;
}

/* Hero Section */
.hero {
  padding: 130px 0 90px;
  background: linear-gradient(135deg, #1e1b4b 0%, #312e81 30%, #4c1d95 65%, #6d28d9 100%);
  color: white;
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 70% 50%, rgba(124, 58, 237, 0.25) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 20% 80%, rgba(37, 99, 235, 0.2) 0%, transparent 60%);
  pointer-events: none;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #a78bfa;
  background: rgba(167, 139, 250, 0.12);
  border: 1px solid rgba(167, 139, 250, 0.3);
  padding: 0.3rem 0.85rem;
  border-radius: 20px;
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: 3.6rem;
  font-weight: 800;
  margin-bottom: 1rem;
  line-height: 1.15;
  letter-spacing: -1px;
}

.highlight {
  background: linear-gradient(90deg, #fbbf24, #f97316);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.35rem;
  font-weight: 500;
  margin-bottom: 1rem;
  color: rgba(255, 255, 255, 0.75);
  letter-spacing: 0.01em;
}

.hero-description {
  font-size: 1.05rem;
  margin-bottom: 2.25rem;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.75;
  max-width: 520px;
}

.hero-buttons {
  display: flex;
  gap: 0.875rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 12px 26px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.25s ease;
  border: none;
  cursor: pointer;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
}

.btn-primary {
  background: linear-gradient(135deg, #f59e0b, #f97316);
  color: #1f2937;
  box-shadow: 0 4px 20px rgba(245, 158, 11, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(245, 158, 11, 0.5);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.4);
  transform: translateY(-2px);
}

.btn-small {
  padding: 8px 16px;
  font-size: 0.875rem;
}

.btn-outline {
  background: transparent;
  color: #2563eb;
  border: 2px solid #2563eb;
}

.btn-outline:hover {
  background: #2563eb;
  color: white;
}

.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.profile-image {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.profile-image::before {
  content: '';
  position: absolute;
  inset: -12px;
  border-radius: 50%;
  background: conic-gradient(from 0deg, #7c3aed, #2563eb, #06b6d4, #7c3aed);
  animation: spin-ring 6s linear infinite;
  opacity: 0.6;
}

.profile-image::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1e1b4b, #4c1d95);
}

@keyframes spin-ring {
  to { transform: rotate(360deg); }
}

.profile-photo {
  width: 300px;
  height: 300px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center center;
  position: relative;
  z-index: 1;
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.5);
  transition: transform 0.3s ease;
  -webkit-transform: translateZ(0);
  transform: translateZ(0);
}

.profile-photo:hover {
  -webkit-transform: scale(1.04) translateZ(0);
  transform: scale(1.04) translateZ(0);
}

/* Section Styles */
section {
  padding: 90px 0;
}

.section-title {
  text-align: center;
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
  padding-bottom: 1.75rem;
  color: #111827;
  position: relative;
  letter-spacing: -0.5px;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  width: 48px;
  height: 4px;
  background: linear-gradient(90deg, #2563eb, #7c3aed);
  border-radius: 2px;
}

/* About Section */
.about {
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}

.about-content {
  max-width: 820px;
  margin: 0 auto;
  text-align: center;
}

.about-text p {
  font-size: 1.08rem;
  margin-bottom: 1.5rem;
  color: #4b5563;
  line-height: 1.8;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.stat {
  text-align: center;
  padding: 2rem 1.5rem;
  background: white;
  border-radius: 16px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.07);
  border: 1px solid rgba(0, 0, 0, 0.04);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}

.stat::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #2563eb, #7c3aed);
}

.stat:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.12);
}

.stat h3 {
  font-size: 2.75rem;
  font-weight: 800;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.4rem;
  letter-spacing: -1px;
}

.stat p {
  color: #6b7280;
  font-weight: 500;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Skills Section */
.skills {
  background: #f8fafc;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.75rem;
  margin-top: 3rem;
}

.skill-category {
  background: white;
  padding: 2rem;
  border-radius: 16px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.07);
  border: 1px solid rgba(0, 0, 0, 0.04);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}

.skill-category::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, #2563eb, #7c3aed);
}

.skill-category:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.11);
}

.skill-category h3 {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #9ca3af;
  margin-bottom: 1.25rem;
  text-align: left;
}

.skill-items {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.skill-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.9rem;
  background: #f0f4ff;
  border: 1px solid #e0e7ff;
  border-radius: 8px;
  transition: background 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
  cursor: default;
}

.skill-item:hover {
  background: #e0e7ff;
  border-color: #c7d2fe;
  transform: translateY(-2px);
}

.skill-item i {
  font-size: 1rem;
  color: #4f46e5;
  width: auto;
}

.skill-item span {
  font-weight: 600;
  font-size: 0.875rem;
  color: #3730a3;
}

/* Projects Section */
.projects {
  background: #f8fafc;
}

.projects-subtitle {
  text-align: center;
  color: #6b7280;
  font-size: 1.1rem;
  margin-top: -2rem;
  margin-bottom: 3rem;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.project-card {
  background: white;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid rgba(0, 0, 0, 0.05);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.14);
  border-color: rgba(37, 99, 235, 0.15);
}

/* Category-based banner gradients */
.project-image {
  height: 160px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.project-card[data-category="web"] .project-image {
  background: linear-gradient(135deg, #0f766e 0%, #0284c7 100%);
}

.project-card[data-category="tool"] .project-image {
  background: linear-gradient(135deg, #334155 0%, #1e293b 100%);
}

.project-card[data-category="ml-ai"] .project-image {
  background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
}

.project-placeholder {
  font-size: 3.5rem;
  color: rgba(255, 255, 255, 0.85);
}

/* Category badge */
.project-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 0.2rem 0.65rem;
  border-radius: 20px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  backdrop-filter: blur(6px);
  background: rgba(255, 255, 255, 0.2);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.project-content {
  padding: 1.75rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.project-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: #111827;
  line-height: 1.3;
}

.project-content p {
  color: #6b7280;
  margin-bottom: 1.25rem;
  line-height: 1.65;
  font-size: 0.95rem;
  flex: 1;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}

.project-tech span {
  background: #f0f4ff;
  color: #3730a3;
  padding: 0.2rem 0.65rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid #e0e7ff;
}

.project-links {
  display: flex;
  gap: 0.75rem;
  margin-top: auto;
}

.btn-github {
  background: #1f2937;
  color: white;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
}

.btn-github:hover {
  background: #111827;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

/* Contact Section */
.contact {
  background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  margin-top: 3rem;
  align-items: start;
}

.contact-info h3 {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 1rem;
  color: #111827;
  letter-spacing: -0.5px;
}

.contact-info p {
  color: #6b7280;
  margin-bottom: 2rem;
  line-height: 1.75;
  font-size: 1.05rem;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.contact-method {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  padding: 0.875rem 1rem;
  background: #f0f4ff;
  border: 1px solid #e0e7ff;
  border-radius: 10px;
}

.contact-method i {
  font-size: 1rem;
  color: #4f46e5;
  width: 18px;
}

.contact-link {
  color: #3730a3;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.contact-link:hover {
  color: #2563eb;
}

.contact-form {
  background: white;
  padding: 2.25rem;
  border-radius: 16px;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.09);
  border: 1px solid rgba(0, 0, 0, 0.04);
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 1.5px solid #e5e7eb;
  border-radius: 10px;
  font-size: 0.95rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  font-family: inherit;
  color: #111827;
  background: #fafafa;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #6366f1;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
  background: white;
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* Footer */
.footer {
  background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
  color: white;
  padding: 3.5rem 0 2.5rem;
  text-align: center;
}

.footer-social {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.social-link {
  width: 46px;
  height: 46px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  backdrop-filter: blur(8px);
}

.social-link:hover {
  background: rgba(99, 102, 241, 0.3);
  border-color: rgba(99, 102, 241, 0.5);
  color: white;
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(99, 102, 241, 0.25);
}

.footer p {
  color: rgba(255, 255, 255, 0.35);
  font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    left: -100%;
    top: 66px;
    flex-direction: column;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(20px);
    width: 100%;
    text-align: center;
    transition: 0.3s;
    box-shadow: 0 10px 27px rgba(0, 0, 0, 0.08);
    padding: 1.5rem 0;
    gap: 0.25rem;
  }

  .nav-menu.active {
    left: 0;
  }

  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2.5rem;
  }

  .hero-content {
    order: 2;
  }

  .hero-image {
    order: 1;
  }

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

  .hero-description {
    max-width: 100%;
  }

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

  .profile-photo {
    width: 220px;
    height: 220px;
  }

  .profile-image::before,
  .profile-image::after {
    inset: -8px;
  }

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

  .contact-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

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

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

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

  .hero-subtitle {
    font-size: 1.15rem;
  }

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

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 260px;
    text-align: center;
  }

  .profile-photo {
    width: 180px;
    height: 180px;
  }
}

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

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

/* Smooth scrolling for older browsers */
@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}