:root {
  --bg: #ffffff;
  --card: #f8f9fa;
  --text: #1a1a1a;
  --muted: #6c757d;
  --border: #dee2e6;
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --gradient-1: #667eea;
  --gradient-2: #764ba2;
  --shadow: rgba(0, 0, 0, 0.1);
  --shadow-lg: rgba(0, 0, 0, 0.15);
}

[data-theme="dark"] {
  --bg: #0f172a;
  --card: #1e293b;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --border: #334155;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --shadow: rgba(0, 0, 0, 0.3);
  --shadow-lg: rgba(0, 0, 0, 0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f172a;
    --card: #1e293b;
    --text: #f1f5f9;
    --muted: #94a3b8;
    --border: #334155;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-lg: rgba(0, 0, 0, 0.5);
  }
}

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

html {
  scroll-behavior: smooth;
  transition: background-color 0.3s ease;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--card);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 10px var(--shadow);
  z-index: 1000;
  transition: all 0.3s ease;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--accent);
  text-decoration: none;
  background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-link {
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent);
}

.nav-link.active::after {
  width: 100%;
}

.theme-toggle {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: 50px;
  padding: 0.5rem 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.3s ease;
}

.theme-toggle:hover {
  transform: scale(1.05);
  border-color: var(--accent);
}

[data-theme="light"] .moon-icon {
  display: none;
}

[data-theme="dark"] .sun-icon {
  display: none;
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1001;
}

.hamburger-line {
  width: 25px;
  height: 3px;
  background: var(--text);
  border-radius: 3px;
  transition: all 0.3s ease;
}

.mobile-menu-toggle.active .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(7px, 7px);
}

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

.mobile-menu-toggle.active .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

#particles-js {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 2rem;
}

.profile-photo {
  width: 180px;
  height: 180px;
  margin: 0 auto 2rem;
  position: relative;
}

.profile-photo img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--accent);
  box-shadow: 0 10px 30px var(--shadow-lg);
}

.profile-placeholder {
  display: none;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
  color: white;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  font-weight: bold;
  border: 4px solid var(--accent);
  box-shadow: 0 10px 30px var(--shadow-lg);
}

.hero-name {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-title {
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: 1.5rem;
  font-weight: 600;
}

.hero-objective {
  font-size: 1.1rem;
  max-width: 700px;
  margin: 0 auto 2rem;
  color: var(--muted);
  line-height: 1.8;
}

.hero-contact {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

.contact-link {
  padding: 0.75rem 1.5rem;
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: 50px;
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
  transition: all 0.3s ease;
}

.contact-link:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 5px 15px var(--shadow);
}

.stats-section {
  padding: 4rem 0;
  background: var(--card);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.stat-card {
  background: var(--bg);
  padding: 3rem 2rem;
  border-radius: 20px;
  text-align: center;
  border: 2px solid transparent;
  background-image: linear-gradient(var(--bg), var(--bg)), 
                    linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
  background-origin: border-box;
  background-clip: padding-box, border-box;
  transition: all 0.3s ease;
}

.stat-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 40px var(--shadow-lg);
}

.stat-number {
  font-size: 3rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 1.1rem;
  color: var(--muted);
  font-weight: 600;
}

.section {
  padding: 5rem 0;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 3rem;
  text-align: center;
  position: relative;
  display: inline-block;
  left: 50%;
  transform: translateX(-50%);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
  border-radius: 2px;
}

.education-list {
  max-width: 900px;
  margin: 0 auto;
}

.education-item {
  background: var(--card);
  padding: 2rem;
  border-radius: 15px;
  margin-bottom: 2rem;
  border-left: 4px solid var(--accent);
  transition: all 0.3s ease;
}

.education-item:hover {
  transform: translateX(10px);
  box-shadow: 0 5px 20px var(--shadow);
}

.education-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.education-header h3 {
  font-size: 1.3rem;
  color: var(--text);
  flex: 1;
}

.education-year {
  color: var(--accent);
  font-weight: 600;
  white-space: nowrap;
}

.education-institute {
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.education-gpa {
  color: var(--text);
}

.internship-card {
  max-width: 800px;
  margin: 0 auto;
  background: var(--card);
  padding: 30px;
  border-radius: 12px;
  border: 1px solid var(--border);
}

.internship-card h3 {
  font-size: 24px;
  margin-bottom: 20px;
  color: var(--accent);
}

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

.project-card {
  background: var(--card);
  padding: 2.5rem;
  border-radius: 20px;
  border: 2px solid transparent;
  background-image: linear-gradient(var(--card), var(--card)), 
                    linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
  background-origin: border-box;
  background-clip: padding-box, border-box;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.project-card:hover::before {
  transform: scaleX(1);
}

.project-card:hover {
  transform: translateY(-15px);
  box-shadow: 0 20px 50px var(--shadow-lg);
}

.project-number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--border);
  margin-bottom: 1rem;
}

.project-title {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text);
}

.project-description {
  color: var(--muted);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.project-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.tag {
  background: var(--accent);
  color: white;
  padding: 0.4rem 1rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  max-width: 1000px;
  margin: 0 auto;
}

.skill-category {
  background: var(--card);
  padding: 2rem;
  border-radius: 15px;
  border: 2px solid var(--border);
  transition: all 0.3s ease;
}

.skill-category:hover {
  border-color: var(--accent);
  box-shadow: 0 10px 30px var(--shadow);
}

.skill-category h3 {
  font-size: 1.3rem;
  margin-bottom: 1.5rem;
  color: var(--accent);
}

.skill-items {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.skill-item {
  background: var(--bg);
  padding: 0.75rem 1.25rem;
  border-radius: 10px;
  color: var(--text);
  font-weight: 500;
  transition: all 0.3s ease;
}

.skill-item:hover {
  transform: translateX(10px);
  background: var(--accent);
  color: white;
}

.certifications-scroll {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
  overflow-x: visible;
}

.certification-card {
  background: var(--card);
  padding: 2rem;
  border-radius: 15px;
  text-align: center;
  border: 2px solid var(--border);
  transition: all 0.3s ease;
}

.certification-card:hover {
  transform: translateY(-10px) scale(1.05);
  border-color: var(--accent);
  box-shadow: 0 15px 40px var(--shadow-lg);
}

.cert-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.certification-card h3 {
  color: var(--text);
  font-size: 1.1rem;
}

.achievement-card {
  background: var(--card);
  padding: 3rem;
  border-radius: 20px;
  display: flex;
  gap: 2rem;
  align-items: center;
  border: 2px solid transparent;
  background-image: linear-gradient(var(--card), var(--card)), 
                    linear-gradient(135deg, var(--gradient-1), var(--gradient-2));
  background-origin: border-box;
  background-clip: padding-box, border-box;
  max-width: 900px;
  margin: 0 auto;
  transition: all 0.3s ease;
}

.achievement-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 50px var(--shadow-lg);
}

.achievement-icon {
  font-size: 4rem;
  flex-shrink: 0;
}

.achievement-content h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text);
}

.achievement-content p {
  color: var(--muted);
  line-height: 1.7;
}

.languages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  max-width: 700px;
  margin: 0 auto;
}

.language-card {
  background: var(--card);
  padding: 2rem;
  border-radius: 15px;
  text-align: center;
  border: 2px solid var(--border);
  transition: all 0.3s ease;
}

.language-card:hover {
  border-color: var(--accent);
  transform: scale(1.05);
}

.language-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text);
}

.language-skills {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.language-skills span {
  background: var(--accent);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 600;
}

.interests-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  max-width: 900px;
  margin: 0 auto;
}

.interest-item {
  background: var(--card);
  padding: 1.5rem;
  border-radius: 15px;
  text-align: center;
  font-weight: 600;
  font-size: 1.1rem;
  border: 2px solid var(--border);
  transition: all 0.3s ease;
}

.interest-item:hover {
  background: var(--accent);
  color: white;
  transform: scale(1.05);
  border-color: var(--accent);
}

.declaration-section {
  background: var(--card);
}

.declaration-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.declaration-content p {
  color: var(--text);
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: 2rem;
}

.signature {
  margin-top: 3rem;
  text-align: right;
}

.signature p {
  margin-bottom: 0.5rem;
}

.location {
  color: var(--muted);
  font-size: 0.95rem;
}

.footer {
  background: var(--card);
  padding: 3rem 0;
  border-top: 2px solid var(--border);
}

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

.footer-content p {
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.footer-contact {
  margin-top: 1rem;
}

[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate].animated {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--card);
    flex-direction: column;
    gap: 0;
    padding: 1rem 0;
    box-shadow: 0 10px 30px var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
  }

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

  .nav-menu li {
    width: 100%;
  }

  .nav-link {
    display: block;
    padding: 1rem 2rem;
    width: 100%;
  }

  .nav-link::after {
    display: none;
  }

  .theme-toggle {
    padding: 0.4rem 0.8rem;
  }

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

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

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

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

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

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

  .certifications-scroll {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    gap: 1rem;
    padding-bottom: 1rem;
  }

  .certification-card {
    min-width: 200px;
    scroll-snap-align: center;
  }
}

@media print {
  body {
    background: white;
    color: black;
  }

  #navbar,
  .theme-toggle,
  #particles-js,
  .hero-contact,
  .footer {
    display: none !important;
  }

  .hero {
    min-height: auto;
    padding: 2rem 0;
  }

  .hero-content {
    padding: 0;
  }

  .section {
    padding: 2rem 0;
    page-break-inside: avoid;
  }

  .section-title {
    position: sticky;
    top: 0;
    background: white;
    padding: 1rem 0;
    margin-bottom: 1rem;
    font-size: 1.5rem;
  }

  .project-card,
  .stat-card,
  .education-item,
  .skill-category,
  .certification-card,
  .achievement-card {
    background: white;
    border: 1px solid #ddd;
    box-shadow: none;
    page-break-inside: avoid;
  }

  .profile-photo {
    width: 120px;
    height: 120px;
  }

  .hero-name {
    font-size: 2rem;
    color: black;
  }

  .hero-title {
    color: #333;
  }

  .contact-info {
    display: block;
    text-align: center;
    margin-bottom: 1rem;
  }

  a {
    color: black;
    text-decoration: none;
  }

  @page {
    margin: 1.5cm;
  }
}