:root {
  --aws-orange: #ff9900;
  --aws-dark-blue: #232f3e;
  --aws-light-blue: #1a476f;
  --aws-teal: #00a1c9;
  --text-primary: #2c3e50;
  --text-secondary: #7f8c8d;
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
  --border-radius: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  background-attachment: fixed;
  overflow-x: hidden;
  position: relative;
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(15px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

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

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

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

@keyframes slideInFromLeft {
  from {
    opacity: 0;
    transform: translateX(-100px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInFromRight {
  from {
    opacity: 0;
    transform: translateX(100px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes bounceIn {
  0% {
    opacity: 0;
    transform: scale(0.3);
  }
  50% {
    opacity: 1;
    transform: scale(1.05);
  }
  70% {
    transform: scale(0.9);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

/* Container */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 15px;
}
/* Header */
header {
  background: var(--aws-dark-blue);
  color: #fff;
  padding: 20px 0;
  position: relative;
  width: 100%;
  box-shadow: var(--shadow);
}

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

nav h1 {
  font-size: 1.4rem;
  font-weight: 600;
  animation: slideInLeft 0.8s ease-out;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 25px;
}

nav ul li a {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
  position: relative;
  transition: var(--transition);
}

nav ul li a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--aws-orange);
  transition: var(--transition);
}

nav ul li a:hover::after {
  width: 100%;
}

nav ul li a:hover {
  color: var(--aws-orange);
}

.hamburger {
  display: none;
  cursor: pointer;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
}
/* Main Content */
main {
  padding-top: 0;
}

/* Hero Section */
.hero-section {
  background: var(--bg-primary);
  border-radius: var(--border-radius);
  padding: 20px 20px;
  margin: 15px 0;
  box-shadow: var(--shadow);
  animation: fadeInOnly 0.8s ease-out;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--aws-orange), var(--aws-teal));
}

.hero-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 15px;
}

.profile-image {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--aws-orange);
  box-shadow: var(--shadow);
  animation: float 3s ease-in-out infinite;
  transition: var(--transition);
}

.profile-image:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-hover);
}

.hero-text {
  flex: 1;
}

.hero-title {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--aws-dark-blue);
  margin-bottom: 6px;
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--aws-orange);
  font-weight: 600;
  margin-bottom: 6px;
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-description {
  color: var(--text-secondary);
  font-size: 1rem;
  animation: fadeInUp 0.8s ease-out 0.6s both;
}

.certification-badges {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0;
  align-items: center;
}

.certification-badge {
  width: 60px;
  height: auto;
  transition: var(--transition);
  animation: fadeInUp 0.8s ease-out 0.8s both;
}

.certification-badge:hover {
  transform: scale(1.1);
}

.contact-buttons {
  display: flex;
  justify-content: center;
  gap: 15px;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 1s both;
}

.contact-button {
  padding: 10px 20px;
  border: 2px solid var(--aws-dark-blue);
  border-radius: 25px;
  text-decoration: none;
  color: var(--aws-dark-blue);
  font-weight: 600;
  font-size: 0.85rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.contact-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--aws-dark-blue);
  transition: var(--transition);
  z-index: -1;
}

.contact-button:hover::before {
  left: 0;
}

.contact-button:hover {
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

/* Sections */
.section {
  background: var(--bg-primary);
  border-radius: var(--border-radius);
  padding: 20px;
  margin: 12px 0;
  box-shadow: var(--shadow);
  transition: var(--transition);
  animation: fadeInUp 0.6s ease-out;
  scroll-margin-top: 100px;
}

.section:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.section h2 {
  color: var(--aws-dark-blue);
  font-size: 1.8rem;
  font-weight: 600;
  margin-bottom: 15px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--aws-orange);
  position: relative;
}

.section h2::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 50px;
  height: 2px;
  background: var(--aws-teal);
}

/* Skills Grid */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 15px;
}

.skill-category {
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  padding: 18px;
  border-radius: var(--border-radius);
  transition: var(--transition);
  border-left: 4px solid var(--aws-orange);
  opacity: 0;
  animation: bounceIn 0.6s ease-out forwards;
}

.skill-category:nth-child(1) { animation-delay: 0.1s; }
.skill-category:nth-child(2) { animation-delay: 0.2s; }
.skill-category:nth-child(3) { animation-delay: 0.3s; }
.skill-category:nth-child(4) { animation-delay: 0.4s; }
.skill-category:nth-child(5) { animation-delay: 0.5s; }
.skill-category:nth-child(6) { animation-delay: 0.6s; }

.skill-category:hover {
  transform: translateY(-5px) scale(1.02);
  box-shadow: var(--shadow-hover);
}

.skill-category h3 {
  color: var(--aws-dark-blue);
  font-size: 1.1rem;
  margin-bottom: 8px;
  font-weight: 600;
}

.skill-category p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Publications */
.publication {
  background: var(--bg-secondary);
  padding: 20px;
  border-radius: var(--border-radius);
  margin-bottom: 15px;
  border-left: 4px solid var(--aws-teal);
  transition: var(--transition);
}

.publication:hover {
  transform: translateX(5px);
}

.publication h3 {
  color: var(--aws-orange);
  font-size: 1rem;
  margin-bottom: 8px;
}

.publication p {
  margin-bottom: 5px;
  font-size: 0.95rem;
}

.publication-link {
  color: var(--aws-teal);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
}

.publication-link:hover {
  text-decoration: underline;
}

/* Experience */
.experience-item {
  background: var(--bg-secondary);
  padding: 20px;
  border-radius: var(--border-radius);
  margin-bottom: 15px;
  border-left: 4px solid var(--aws-orange);
  transition: var(--transition);
}

.experience-item:hover {
  transform: translateX(8px) translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.experience-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.experience-header h3 {
  color: var(--aws-dark-blue);
  font-size: 1.2rem;
  font-weight: 600;
}

.experience-duration {
  background: var(--aws-orange);
  color: white;
  padding: 4px 12px;
  border-radius: 15px;
  font-size: 0.8rem;
  font-weight: 600;
}

.company {
  color: var(--aws-teal);
  font-weight: 600;
  margin-bottom: 10px;
}

.experience-highlights {
  list-style: none;
  padding-left: 0;
}

.experience-highlights li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 5px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.experience-highlights li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--aws-orange);
  font-weight: bold;
}

/* Education */
.education-item {
  background: var(--bg-secondary);
  padding: 18px;
  border-radius: var(--border-radius);
  border-left: 4px solid var(--aws-teal);
  margin-bottom: 12px;
  transition: var(--transition);
}

.education-item:hover {
  transform: translateX(5px) translateY(-2px);
  box-shadow: var(--shadow);
}

.education-item h3 {
  color: var(--aws-dark-blue);
  font-size: 1.2rem;
  margin-bottom: 5px;
}

.institution {
  color: var(--aws-orange);
  font-weight: 600;
  margin-bottom: 10px;
}

.education-details {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
}

.year {
  background: var(--aws-teal);
  color: white;
  padding: 4px 12px;
  border-radius: 15px;
  font-weight: 600;
}

.achievement {
  color: var(--text-secondary);
}

/* Certifications */
.certifications-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 15px;
}

.certification-card {
  background: linear-gradient(135deg, var(--aws-dark-blue) 0%, var(--aws-light-blue) 100%);
  color: white;
  padding: 20px;
  border-radius: var(--border-radius);
  text-decoration: none;
  transition: var(--transition);
  display: block;
}

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

.certification-card h3 {
  margin-bottom: 8px;
  font-size: 1.1rem;
}

.certification-card p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.9rem;
}

/* Community */
.community-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.community-item {
  background: var(--bg-secondary);
  padding: 20px;
  border-radius: var(--border-radius);
  border-left: 4px solid var(--aws-orange);
  transition: var(--transition);
}

.community-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.community-item h3 {
  color: var(--aws-dark-blue);
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.community-item p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 10px;
}

.community-link {
  color: var(--aws-teal);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
}

.community-link:hover {
  text-decoration: underline;
}

/* Medium sections */
#medium-blogs {
  background: var(--bg-primary);
  border-radius: var(--border-radius);
  padding: 25px;
  margin: 15px 0;
  box-shadow: var(--shadow);
}

.medium-post {
  background: var(--bg-secondary);
  padding: 15px;
  border-radius: 8px;
  margin-bottom: 10px;
  border-left: 3px solid var(--aws-teal);
  transition: var(--transition);
}

.medium-post:hover {
  transform: translateX(5px);
}

.medium-post a {
  color: var(--aws-dark-blue);
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
}

.medium-post a:hover {
  color: var(--aws-orange);
}

/* Footer */
footer {
  background: var(--aws-dark-blue);
  color: #fff;
  text-align: center;
  padding: 18px 0;
  margin-top: 25px;
}

footer a {
  color: var(--aws-orange);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 0 10px;
  }

  .hamburger {
    display: block;
  }

  nav ul {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--aws-dark-blue);
    flex-direction: column;
    align-items: center;
    padding: 20px 0;
    gap: 10px;
  }

  nav ul.show {
    display: flex;
  }

  .hero-content {
    flex-direction: column;
    text-align: center;
    gap: 15px;
  }

  .certification-badges {
    flex-direction: row;
    gap: 15px;
    justify-content: center;
  }

  .hero-title {
    font-size: 1.8rem;
  }

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

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

  .contact-button {
    width: 200px;
    text-align: center;
  }

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

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

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

  .experience-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 5px;
  }

  .education-details {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .section {
    padding: 15px;
    margin: 8px 0;
  }
}

@media (max-width: 480px) {
  .hero-section {
    padding: 15px;
  }

  .profile-image {
    width: 100px;
    height: 100px;
  }

  .hero-title {
    font-size: 1.6rem;
  }

  .section {
    padding: 15px;
  }
}

/* Scroll animations */
.section {
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition);
}

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