:root {
  --primary: #2563eb;
  --secondary: #8b5cf6;
  --accent: #e11d48;
  --dark: #111827;
  --light: #f9fafb;
  --gray: #4b5563;
  --gray-light: #f3f4f6;
  --success: #059669;
  --warning: #d97706;
  --danger: #dc2626;
  --text: #111827;
  --border-radius: 12px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.08);
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-md: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
  --transition: all 0.3s ease;
  --container-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: var(--text);
  line-height: 1.6;
  background-color: var(--light);
}

/* Container */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Navbar Styles */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
  z-index: 1000;
  transition: var(--transition);
}

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

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  transition: transform 0.3s ease;
}

.logo:hover {
  transform: translateY(-2px);
}

.logo-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, #2563eb, #1e40af);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
  position: relative;
  overflow: hidden;
  animation: subtle-rotate 6s ease-in-out infinite alternate;
  transition: all 0.3s ease;
}

@keyframes subtle-rotate {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(5deg);
  }
}

.logo:hover .logo-icon {
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(37, 99, 235, 0.5);
}

.logo-icon::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(
    to bottom right,
    rgba(255, 255, 255, 0.4) 0%,
    rgba(255, 255, 255, 0) 80%
  );
  transform: rotate(30deg);
  pointer-events: none;
  transition: all 0.5s ease;
}

.logo:hover .logo-icon::before {
  transform: rotate(150deg);
}

.logo-icon span {
  color: white;
  font-size: 1.3rem;
  font-weight: 900;
  letter-spacing: -1px;
  text-shadow: 0px 2px 4px rgba(0, 0, 0, 0.25);
  position: relative;
  z-index: 2;
}

.logo-text {
  position: relative;
  font-weight: 800;
  background: linear-gradient(135deg, #2563eb, #1e40af);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-size: 1.6rem;
  letter-spacing: -0.5px;
  transition: all 0.3s ease;
}

.logo:hover .logo-text {
  background: linear-gradient(135deg, #1e40af, #2563eb);
  -webkit-background-clip: text;
  background-clip: text;
}

.logo-text::after {
  content: '';
  position: absolute;
  right: -12px;
  bottom: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--secondary), var(--accent));
  box-shadow: 0 0 10px rgba(225, 29, 72, 0.5);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.2);
    opacity: 0.7;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 2rem;
}

.nav-link {
  position: relative;
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  font-size: 1rem;
  transition: var(--transition);
  padding: 0.5rem 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  transition: width 0.3s ease;
}

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

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

.mobile-menu {
  display: none;
  flex-direction: column;
  cursor: pointer;
}

.mobile-menu span {
  width: 25px;
  height: 3px;
  background-color: var(--text);
  margin: 3px 0;
  border-radius: 3px;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6rem 1rem;
  background-color: var(--light);
  position: relative;
  overflow: hidden;
}

.hero::before, .hero::after {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  z-index: 0;
}

.hero::before {
  background: radial-gradient(circle, rgba(67, 97, 238, 0.1) 0%, rgba(255, 255, 255, 0) 70%);
  top: -300px;
  left: -300px;
}

.hero::after {
  background: radial-gradient(circle, rgba(247, 37, 133, 0.1) 0%, rgba(255, 255, 255, 0) 70%);
  bottom: -300px;
  right: -300px;
}

.hero-content {
  max-width: 800px;
  position: relative;
  z-index: 1;
  animation: fadeIn 1s ease;
}

.profile-image {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  margin: 0 auto 2rem;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  box-shadow: var(--shadow-lg);
  border: 5px solid white;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  background-image: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0px 3px 10px rgba(59, 130, 246, 0.2);
  animation: fadeIn 1.2s ease;
}

.hero p {
  font-size: 1.3rem;
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  color: var(--gray);
  animation: fadeIn 1.4s ease;
}

.hero-description {
  color: var(--dark);
  font-weight: 600;
  text-shadow: 0 1px 2px rgba(255, 255, 255, 0.5);
  font-size: 1.2rem;
}

.hero-contact {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 2rem;
  font-size: 1.1rem;
  color: var(--text);
  animation: fadeIn 1.6s ease;
}

.hero-contact span {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.contact-item-dark {
  color: var(--dark);
  font-weight: 700;
  text-shadow: 0 1px 2px rgba(255, 255, 255, 0.5);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.contact-item-dark i {
  color: var(--primary);
  font-size: 1.2rem;
}

.contact-item-dark a {
  color: var(--dark);
  font-weight: 700;
  text-decoration: none;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.contact-item-dark a:hover {
  color: var(--secondary);
  transform: translateY(-2px);
}

.contact-item-dark a i {
  color: var(--primary);
  transition: var(--transition);
}

.contact-item-dark a:hover i {
  color: var(--secondary);
}

.hero-contact a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
}

.hero-contact a:hover {
  color: var(--secondary);
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: linear-gradient(135deg, #2563eb, #1e40af);
  color: white;
  padding: 1rem 2.5rem;
  border-radius: 50px;
  font-size: 1.1rem;
  font-weight: 700;
  text-decoration: none;
  transition: var(--transition);
  box-shadow: 0 5px 15px rgba(37, 99, 235, 0.3);
  border: none;
  cursor: pointer;
  animation: fadeIn 1.8s ease;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.cta-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background: linear-gradient(135deg, #1e40af, #2563eb);
  transition: width 0.3s ease;
  z-index: -1;
}

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

.cta-button:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.4);
}

/* Section Styles */
.section {
  padding: 7rem 2rem;
  position: relative;
  transition: all 0.5s ease;
}

.section:nth-child(even) {
  background-color: var(--gray-light);
}

/* Add section entrance animations */
@keyframes sectionFadeIn {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.section {
  animation: sectionFadeIn 0.8s ease-out forwards;
  opacity: 0;
}

.section-title {
  font-size: 2.8rem;
  margin-bottom: 3rem;
  text-align: center;
  position: relative;
  font-weight: 800;
  color: var(--dark);
  letter-spacing: -0.5px;
}

.section-title span {
  background-image: linear-gradient(135deg, #2563eb, #1e40af);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  position: relative;
  z-index: 1;
  text-shadow: 0 2px 10px rgba(37, 99, 235, 0.2);
}

.section-title span::before {
  content: '';
  position: absolute;
  bottom: 5px;
  left: 0;
  width: 100%;
  height: 10px;
  background: linear-gradient(90deg, rgba(37, 99, 235, 0.15), rgba(225, 29, 72, 0.15));
  z-index: -1;
  border-radius: 4px;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 4px;
  background: linear-gradient(to right, #2563eb, #e11d48);
  border-radius: 4px;
  box-shadow: 0 3px 8px rgba(37, 99, 235, 0.4);
}

/* About Section */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  max-width: var(--container-width);
  margin: 0 auto;
}

.about-image {
  height: 400px;
  border-radius: var(--border-radius);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-lg);
}

.about-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.about-image:hover img {
  transform: scale(1.05);
}

.about-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.about-text h3 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  position: relative;
}

.about-text h3::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  border-radius: 2px;
}

.about-text p {
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--gray);
}

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

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 100%;
  background: linear-gradient(to bottom, var(--primary), var(--secondary));
  border-radius: 2px;
}

.timeline-item {
  display: flex;
  justify-content: flex-start;
  position: relative;
  margin-bottom: 4rem;
}

.timeline-item:nth-child(even) {
  flex-direction: row-reverse;
}

.timeline-dot {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 20px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 50%;
  z-index: 2;
}

.timeline-content {
  width: 45%;
  background-color: white;
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  position: relative;
  transition: var(--transition);
}

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

.timeline-content h3 {
  font-size: 1.4rem;
  margin-bottom: 1rem;
  color: var(--primary);
}

.timeline-date {
  font-weight: 600;
  color: var(--secondary);
  margin-bottom: 0.5rem;
}

.timeline-place {
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.timeline-description {
  margin-bottom: 0.5rem;
  color: var(--gray);
}

.timeline-courses {
  font-size: 0.9rem;
  color: var(--gray);
  line-height: 1.6;
}

/* Skills Section */
.skills-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2.5rem;
  max-width: var(--container-width);
  margin: 0 auto;
}

.skill-category {
  background-color: white;
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.skill-category:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.skill-category h3 {
  font-size: 1.4rem;
  margin-bottom: 1.5rem;
  color: var(--primary);
  position: relative;
  padding-bottom: 10px;
}

.skill-category h3::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  border-radius: 2px;
}

.skills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.skill-tag {
  padding: 0.6rem 1.2rem;
  background: rgba(37, 99, 235, 0.08);
  border: 1px solid rgba(37, 99, 235, 0.15);
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.skill-tag::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 0%;
  height: 100%;
  background: linear-gradient(to right, #2563eb, #1e40af);
  transition: width 0.3s ease;
  z-index: -1;
}

.skill-tag:hover {
  color: white;
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(37, 99, 235, 0.2);
  border-color: transparent;
}

.skill-tag:hover::before {
  width: 100%;
}

/* Projects Section */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2.5rem;
  max-width: var(--container-width);
  margin: 0 auto;
}

.project-card {
  background-color: white;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  cursor: pointer;
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.project-image {
  height: 200px;
  position: relative;
  overflow: hidden;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.project-card:hover .project-image img {
  transform: scale(1.1);
}

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  transition: var(--transition);
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.project-preview {
  color: white;
  font-weight: 600;
  padding: 0.8rem 1.5rem;
  border: 2px solid white;
  border-radius: 50px;
  transform: translateY(20px);
  transition: var(--transition);
}

.project-card:hover .project-preview {
  transform: translateY(0);
}

.project-content {
  padding: 1.5rem;
}

.project-category {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--secondary);
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.project-content h3 {
  font-size: 1.4rem;
  margin-bottom: 0.75rem;
  transition: var(--transition);
}

.project-card:hover .project-content h3 {
  color: var(--primary);
}

.project-content p {
  font-size: 0.95rem;
  color: var(--gray);
  margin-bottom: 1rem;
  line-height: 1.6;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.project-links {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.project-link {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

.project-link:hover {
  color: var(--secondary);
}

.link-icon {
  transition: transform 0.3s ease;
}

.project-link:hover .link-icon {
  transform: translateX(3px) translateY(-3px);
}

/* Project Filter */
.project-filter {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.filter-btn {
  padding: 0.6rem 1.2rem;
  background: rgba(67, 97, 238, 0.1);
  border: 1px solid rgba(67, 97, 238, 0.2);
  border-radius: 50px;
  color: var(--text);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn.active, 
.filter-btn:hover {
  background: linear-gradient(to right, var(--primary), var(--secondary));
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* Certifications Section */
.certifications-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2.5rem;
  max-width: var(--container-width);
  margin: 0 auto;
}

.certification-card {
  background-color: white;
  border-radius: var(--border-radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.certification-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.certification-logo {
  height: 100px;
  padding: 1rem;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: var(--gray-light);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.certification-logo img {
  max-width: 80%;
  max-height: 80%;
  object-fit: contain;
}

.certification-content {
  padding: 1.5rem;
  flex: 1;
}

.certification-content h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.certification-issuer {
  font-size: 0.95rem;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.certification-date {
  font-size: 0.9rem;
  color: var(--gray);
}

/* Resume Section */
.resume-download {
  text-align: center;
  padding: 6rem 0;
  background: var(--gray-light);
  position: relative;
  overflow: hidden;
}

.resume-download::before {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(67, 97, 238, 0.1) 0%, rgba(255, 255, 255, 0) 70%);
  top: -150px;
  left: -150px;
  z-index: 0;
}

.resume-download::after {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(247, 37, 133, 0.1) 0%, rgba(255, 255, 255, 0) 70%);
  bottom: -150px;
  right: -150px;
  z-index: 0;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.2rem 2.5rem;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  color: white;
  text-decoration: none;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: 0.5px;
  transition: var(--transition);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.download-btn::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0%;
  height: 100%;
  background: linear-gradient(to right, var(--secondary), var(--primary));
  transition: width 0.4s ease;
  z-index: -1;
}

.download-btn:hover {
  transform: translateY(-5px) scale(1.03);
  box-shadow: var(--shadow-lg);
}

.download-btn:hover::after {
  width: 100%;
}

/* Contact Section */
.contact-content {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 4rem;
  max-width: var(--container-width);
  margin: 0 auto;
  position: relative;
}

.contact-content::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 10%;
  height: 80%;
  width: 1px;
  background: linear-gradient(to bottom, var(--primary), var(--secondary));
}

.contact-info {
  padding-right: 2rem;
}

.contact-info h3 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  position: relative;
}

.contact-info h3::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  border-radius: 2px;
}

.contact-info p {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--gray);
  margin-bottom: 2rem;
}

.contact-item {
  display: flex;
  align-items: center;
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
  color: var(--text);
  position: relative;
  padding-left: 2rem;
}

.contact-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1.5rem;
  height: 1.5rem;
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" fill="%234361ee" viewBox="0 0 24 24"><path d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm0 18c-4.41 0-8-3.59-8-8s3.59-8 8-8 8 3.59 8 8-3.59 8-8 8zm-1-13h2v6h-2zm0 8h2v2h-2z"/></svg>');
  background-repeat: no-repeat;
  background-size: contain;
}

.contact-item:nth-child(3)::before {
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" fill="%234361ee" viewBox="0 0 24 24"><path d="M20 4H4c-1.1 0-1.99.9-1.99 2L2 18c0 1.1.9 2 2 2h16c1.1 0 2-.9 2-2V6c0-1.1-.9-2-2-2zm0 14H4V8l8 5 8-5v10zm-8-7L4 6h16l-8 5z"/></svg>');
}

.contact-item:nth-child(4)::before {
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" fill="%234361ee" viewBox="0 0 24 24"><path d="M6.62 10.79c1.44 2.83 3.76 5.14 6.59 6.59l2.2-2.2c.27-.27.67-.36 1.02-.24 1.12.37 2.33.57 3.57.57.55 0 1 .45 1 1V20c0 .55-.45 1-1 1-9.39 0-17-7.61-17-17 0-.55.45-1 1-1h3.5c.55 0 1 .45 1 1 0 1.25.2 2.45.57 3.57.11.35.03.74-.25 1.02l-2.2 2.2z"/></svg>');
}

.contact-form {
  background-color: white;
  padding: 2.5rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  position: relative;
}

.contact-form::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 5px;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 1px solid var(--gray-light);
  border-radius: var(--border-radius);
  font-size: 1rem;
  transition: var(--transition);
  background-color: var(--gray-light);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(67, 97, 238, 0.2);
  outline: none;
}

.form-group input:hover,
.form-group textarea:hover {
  border-color: var(--primary);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

.form-group.form-checkbox {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 25px;
}

.form-group.form-checkbox input {
  width: auto;
  height: auto;
  margin: 0;
}

.form-group.form-checkbox label {
  font-size: 0.9rem;
  opacity: 0.8;
  margin: 0;
}

.submit-btn {
  width: 100%;
  padding: 1.1rem;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 1.1rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 5px 20px rgba(67, 97, 238, 0.3);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.btn-icon {
  font-size: 1.2rem;
  transition: transform 0.4s ease;
}

.submit-btn:hover {
  background: linear-gradient(to right, var(--secondary), var(--primary));
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(67, 97, 238, 0.4);
}

.submit-btn:hover .btn-icon {
  transform: translateX(5px);
}

.error {
  color: var(--danger);
  font-size: 0.9rem;
  margin-top: 0.5rem;
  font-weight: 500;
}

/* Footer */
.footer {
  background: var(--dark);
  color: white;
  padding: 3.5rem 0;
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(to right, #2563eb, #e11d48, #2563eb);
  box-shadow: 0 0 20px rgba(37, 99, 235, 0.5);
}

.footer::after {
  content: '';
  position: absolute;
  bottom: -80px;
  right: -80px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, rgba(0, 0, 0, 0) 70%);
  border-radius: 50%;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 2rem;
  position: relative;
  z-index: 2;
}

.footer p {
  font-size: 1.1rem;
  font-weight: 500;
  opacity: 0.95;
  position: relative;
  z-index: 2;
  margin: 0;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.social-links {
  display: flex;
  gap: 15px;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
  color: white;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.social-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0%;
  height: 100%;
  background: linear-gradient(135deg, #2563eb, #1e40af);
  transition: width 0.3s ease;
  z-index: -1;
  transform: rotate(45deg);
}

.social-link:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
  color: white;
}

.social-link:hover::before {
  width: 200%;
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  z-index: 2000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  animation: fadeIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  perspective: 1000px;
}

.modal-content {
  background-color: white;
  margin: 5% auto;
  padding: 2.5rem;
  border-radius: var(--border-radius);
  width: 90%;
  max-width: 700px;
  position: relative;
  animation: slideIn 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.1);
  overflow: hidden;
}

.modal-content::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 5px;
  background: linear-gradient(to right, var(--primary), var(--secondary));
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideIn {
  from {
    transform: translateY(50px) rotateX(10deg);
    opacity: 0;
  }
  to {
    transform: translateY(0) rotateX(0);
    opacity: 1;
  }
}

.close {
  position: absolute;
  right: 1.5rem;
  top: 1.5rem;
  width: 35px;
  height: 35px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  line-height: 1;
  cursor: pointer;
  color: #666;
  transition: var(--transition);
  transform: rotate(0deg);
}

.close:hover {
  color: var(--secondary);
  background: rgba(0, 0, 0, 0.08);
  transform: rotate(90deg);
}

/* Progress Bar */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  z-index: 9999;
  width: 0%;
  transition: width 0.2s ease;
}

/* Dark Mode Toggle */
.dark-mode-toggle {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: white;
  border: none;
  box-shadow: var(--shadow-md);
  cursor: pointer;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.dark-mode-toggle:hover {
  transform: scale(1.1);
}

body.dark-mode {
  --primary: #6d28d9;
  --secondary: #ec4899;
  --dark: #0f172a;
  --light: #1e293b;
  --gray: #94a3b8;
  --gray-light: #334155;
  --text: #f8fafc;
  --text-light: #cbd5e1;
  background-color: var(--dark);
  color: var(--text);
}

body.dark-mode .navbar {
  background-color: rgba(15, 23, 42, 0.9);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

body.dark-mode .nav-link {
  color: var(--text);
}

body.dark-mode .logo-icon {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: 0 4px 10px rgba(109, 40, 217, 0.4);
}

body.dark-mode .hero-description,
body.dark-mode .contact-item-dark,
body.dark-mode .contact-item-dark a {
  color: var(--text-light);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

body.dark-mode .section {
  background-color: var(--dark);
}

body.dark-mode .section:nth-child(even) {
  background-color: var(--light);
}

body.dark-mode .project-card,
body.dark-mode .certification-card,
body.dark-mode .skill-category,
body.dark-mode .timeline-content,
body.dark-mode .contact-form {
  background-color: var(--light);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

body.dark-mode .form-group input,
body.dark-mode .form-group textarea {
  background-color: var(--gray-light);
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.1);
}

body.dark-mode .footer {
  background-color: #0f172a;
}

body.dark-mode .dark-mode-toggle {
  background-color: var(--gray-light);
  color: var(--text);
}

body.dark-mode .dark-mode-toggle svg {
  fill: white;
}

body.dark-mode .certification-logo {
  background-color: var(--gray-light);
}

body.dark-mode .modal-content {
  background-color: var(--light);
  color: var(--text);
}

body.dark-mode .close {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--text-light);
}

body.dark-mode .skill-tag {
  background: rgba(109, 40, 217, 0.2);
  color: var(--text-light);
}

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

::-webkit-scrollbar-track {
  background: #f1f5f9;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(to bottom, var(--primary), var(--secondary));
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(to bottom, var(--secondary), var(--primary));
}

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

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.animate-fadeInUp {
  animation: fadeInUp 0.6s ease forwards;
  opacity: 0;
}

.animate-fadeIn {
  animation: fadeIn 0.8s ease forwards;
  opacity: 0;
}

.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }
.delay-400 { animation-delay: 0.4s; }
.delay-500 { animation-delay: 0.5s; }

/* Responsive Design */
@media (max-width: 1200px) {
  .container, .nav-container, .about-content, 
  .skills-container, .projects-grid, .certifications-grid, 
  .contact-content, .timeline {
    max-width: 95%;
  }
}

@media (max-width: 992px) {
  .section-title {
    font-size: 2.5rem;
  }
  
  .about-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .about-image {
    height: 350px;
  }
  
  .timeline::before {
    left: 30px;
  }
  
  .timeline-item, .timeline-item:nth-child(even) {
    flex-direction: row;
  }
  
  .timeline-dot {
    left: 30px;
  }
  
  .timeline-content {
    width: 85%;
    margin-left: 60px;
  }
}

@media (max-width: 768px) {
  .logo {
    font-size: 1.2rem;
    gap: 0.5rem;
  }
  
  .logo-icon {
    width: 30px;
    height: 30px;
  }
  
  .logo-text {
    display: none;
  }
  
  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    background: white;
    box-shadow: var(--shadow);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    transform: translateY(-120%);
    transition: transform 0.3s ease;
    z-index: 100;
  }
  
  @keyframes slideDown {
    from { transform: translateY(-120%); }
    to { transform: translateY(0); }
  }

  .nav-links.active {
    transform: translateY(0);
    animation: slideDown 0.3s ease;
  }
  
  .nav-links a {
    padding: 1rem 0;
    border-bottom: 1px solid rgba(0,0,0,0.05);
  }
  
  .nav-links a::after {
    bottom: auto;
    left: 0;
    height: 100%;
    width: 3px;
    top: 0;
  }

  .mobile-menu {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    border-radius: 5px;
    transition: var(--transition);
  }
  
  .mobile-menu:hover {
    background-color: rgba(0, 0, 0, 0.05);
  }
  
  .mobile-menu span {
    transition: var(--transition);
  }
  
  .nav-links.active + .mobile-menu span:first-child {
    transform: translateY(9px) rotate(45deg);
  }
  
  .nav-links.active + .mobile-menu span:nth-child(2) {
    opacity: 0;
  }
  
  .nav-links.active + .mobile-menu span:last-child {
    transform: translateY(-9px) rotate(-45deg);
  }

  .hero h1 {
    font-size: 2.8rem;
  }

  .hero p {
    font-size: 1.1rem;
    padding: 0 1rem;
  }

  .profile-image {
    width: 160px;
    height: 160px;
    font-size: 3rem;
  }
  
  .contact-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .contact-content::after {
    display: none;
  }
  
  .contact-info h3::after {
    left: 50%;
    transform: translateX(-50%);
  }

  .section {
    padding: 5rem 1.5rem;
  }

  .projects-grid, .certifications-grid {
    grid-template-columns: 1fr;
  }
  
  .section-title {
    font-size: 2.4rem;
  }
  
  .contact-info {
    text-align: center;
    padding-right: 0;
  }
  
  body.dark-mode .nav-links {
    background-color: var(--dark);
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 2.2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .profile-image {
    width: 140px;
    height: 140px;
    font-size: 2.5rem;
  }
  
  .logo-text {
    display: none;
  }
  
  .logo-icon {
    width: 32px;
    height: 32px;
  }

  .section-title {
    font-size: 2rem;
  }
  
  .about-image {
    height: 300px;
  }

  .modal-content {
    margin: 10% auto;
    padding: 1.5rem;
    width: 95%;
  }
  
  .project-card {
    border-radius: 15px;
  }
  
  .download-btn {
    padding: 1rem 2rem;
    font-size: 1rem;
  }
  
  .timeline-content {
    width: 80%;
  }
  
  .hero-contact {
    flex-direction: column;
    gap: 0.8rem;
  }
}