:root {
  --primary-color: #2563eb;
  --secondary-color: #1e3a8a;
  --accent-color: #d4af37;
  --text-primary: #1a202c;
  --text-secondary: #64748b;
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e3a8a 55%, #2563eb 100%);
  --border-color: #e5e7eb;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 25px -5px rgb(15 23 42 / 0.15);
  --border-radius: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Header & Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: var(--transition);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--secondary-color);
  text-decoration: none;
}

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

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

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

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

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

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
}

.mobile-toggle span {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* Hero Section */
.hero {
  background: var(--bg-gradient);
  min-height: 100vh;
  display: flex;
  align-items: center;
  color: white;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.1'%3E%3Ccircle cx='30' cy='30' r='1'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  animation: float 20s ease-in-out infinite;
  pointer-events: none;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 3rem;
  align-items: center;
  z-index: 2;
}

.hero-text h1 {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.hero-text .subtitle {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 1.5rem;
}

.hero-text p {
  font-size: 1.1rem;
  margin-bottom: 2rem;
  opacity: 0.85;
  max-width: 600px;
}

.hero-image {
  text-align: center;
}

.profile-img {
  width: 280px;
  height: 280px;
  border-radius: var(--border-radius);
  object-fit: cover;
  border: 6px solid rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
}

.profile-img:hover {
  transform: scale(1.05);
  border-color: rgba(212, 175, 55, 0.5);
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  padding: 0.75rem 2rem;
  border: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-primary {
  background: white;
  color: var(--secondary-color);
}

.btn-primary:hover {
  background: var(--bg-secondary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.5);
}

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

/* Sections */
.section {
  padding: 5rem 0;
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 3rem;
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: var(--accent-color);
  border-radius: 2px;
}

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

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

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

.skill-category h3 {
  color: var(--secondary-color);
  margin-bottom: 1.5rem;
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.skill-category h3 i {
  color: var(--primary-color);
}

.skill-list {
  list-style: none;
}

.skill-item {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.skill-item:last-child {
  border-bottom: none;
}

.skill-level {
  background: var(--secondary-color);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
}

/* Experience Section */
.timeline-item {
  background: var(--bg-secondary);
  padding: 2rem;
  border-radius: var(--border-radius);
  margin-bottom: 2rem;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

.timeline-item p {
  margin-bottom: 1.25rem;
  color: var(--text-primary);
}

.timeline-item p:last-of-type {
  margin-bottom: 0;
}

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

.education-card {
  background: var(--bg-secondary);
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border-left: 4px solid var(--accent-color);
}

.education-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

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

.education-institution {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Certifications & Badges Section */
.certifications-display, .badges-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.credly-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.hbp-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

.credly-badges > div,
.credly-badges > iframe,
.credly-badges > a,
.hbp-badges > a {
  display: inline-block;
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.credly-badges > div:hover,
.credly-badges > iframe:hover,
.credly-badges > a:hover,
.hbp-badges > a:hover {
  transform: translateY(-6px) scale(1.06);
  filter: drop-shadow(0 10px 18px rgba(37, 99, 235, 0.35));
}

.credly-badges > a img,
.hbp-badges img {
  display: block;
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.credly-badges > a:hover img,
.hbp-badges > a:hover img {
  box-shadow: 0 10px 22px rgba(212, 175, 55, 0.45);
}

/* Contact Section */
.contact {
  background: var(--bg-gradient);
  color: white;
}

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

.contact-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: white;
  text-decoration: none;
  padding: 1rem 2rem;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.contact-link:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-color);
  transform: translateY(-2px);
}

/* Footer */
.footer {
  background: #0f172a;
  color: rgba(255, 255, 255, 0.7);
  text-align: center;
  padding: 1.75rem 0;
  font-size: 0.9rem;
}

/* Animations */
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}

.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.6s ease forwards;
}

@keyframes fadeInUp {
  to {
      opacity: 1;
      transform: translateY(0);
  }
}

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

  .nav-menu {
      position: fixed;
      top: 100%;
      left: 0;
      right: 0;
      background: white;
      flex-direction: column;
      gap: 1rem;
      padding: 2rem;
      box-shadow: var(--shadow-lg);
      transform: translateY(-100%);
      opacity: 0;
      visibility: hidden;
      transition: var(--transition);
  }

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

  .hero-content {
      grid-template-columns: 1fr;
      text-align: center;
      gap: 2rem;
  }

  .hero-text h1 {
      font-size: 2.5rem;
  }

  .hero-text > div {
      display: flex;
      flex-direction: column;
      gap: 1rem;
      align-items: center;
  }

  .profile-img {
      width: 200px;
      height: 200px;
  }

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

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

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

  .credly-badges,
  .hbp-badges {
      justify-content: center;
  }
}

@media (max-width: 480px) {
  .container {
      padding: 0 0.5rem;
  }

  .hero-text h1 {
      font-size: 2rem;
  }

  .section {
      padding: 3rem 0;
  }

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