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

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --neutral-50: #fafafa;
  --neutral-100: #f5f5f5;
  --neutral-200: #e5e5e5;
  --neutral-400: #a3a3a3;
  --neutral-500: #737373;
  --neutral-600: #525252;
  --neutral-900: #171717;
  --white: #ffffff;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Outfit', 'Inter', system-ui, sans-serif;
  background-color: var(--neutral-50);
  color: var(--neutral-900);
  line-height: 1.6;
}

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

.min-h-screen {
  min-height: 100vh;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(229, 229, 229, 0.5);
}

.nav-container {
  max-width: 80rem;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.025em;
}

.logo-dot {
  color: var(--primary);
}

.desktop-nav {
  display: none;
  gap: 2rem;
}

@media (min-width: 768px) {
  .desktop-nav {
    display: flex;
  }
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--neutral-500);
  transition: color 0.2s;
}

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

.mobile-toggle {
  display: block;
  padding: 0.5rem;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--neutral-600);
}

@media (min-width: 768px) {
  .mobile-toggle {
    display: none;
  }
}

.mobile-nav {
  display: none;
  padding: 1.5rem;
  background: var(--white);
  border-bottom: 1px solid var(--neutral-200);
}

.mobile-nav.active {
  display: block;
}

.mobile-nav-link {
  display: block;
  padding: 0.75rem 0;
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--neutral-600);
}

/* Hero Section */
.hero {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 5rem 1.5rem;
  position: relative;
  overflow: hidden;
}

.hero-content {
  text-align: center;
  z-index: 10;
  max-width: 56rem;
}

.hero-badge {
  display: inline-block;
  padding: 0.375rem 0.75rem;
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--primary);
  background: #eff6ff;
  border-radius: 9999px;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 4rem;
  }
}

.hero-description {
  font-size: 1.25rem;
  color: var(--neutral-600);
  max-width: 42rem;
  margin: 0 auto 2.5rem;
  line-height: 1.75;
}

.hero-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  background: var(--neutral-900);
  color: var(--white);
  font-weight: 600;
  border-radius: 0.75rem;
  transition: background 0.2s;
}

.hero-btn:hover {
  background: var(--neutral-800);
}

.btn-arrow {
  transition: transform 0.2s;
}

.hero-btn:hover .btn-arrow {
  transform: translateX(4px);
}

.hero-bg {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  height: 100%;
  max-width: 56rem;
  opacity: 0.2;
  pointer-events: none;
}

.hero-blob {
  position: absolute;
  border-radius: 9999px;
  filter: blur(120px);
}

.hero-blob-1 {
  top: 0;
  left: 0;
  width: 18rem;
  height: 18rem;
  background: #60a5fa;
}

.hero-blob-2 {
  bottom: 0;
  right: 0;
  width: 18rem;
  height: 18rem;
  background: #c084fc;
}

/* About Section */
.about {
  padding: 6rem 1.5rem;
  background: var(--white);
}

.about-container {
  max-width: 80rem;
  margin: 0 auto;
  display: grid;
  gap: 4rem;
}

@media (min-width: 768px) {
  .about-container {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
}

.about-image-wrapper {
  position: relative;
}

.about-image {
  aspect-ratio: 1;
  border-radius: 1.5rem;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.1);
}

.about-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.experience-badge {
  position: absolute;
  bottom: -1.5rem;
  right: -1.5rem;
  width: 8rem;
  height: 8rem;
  background: var(--primary);
  border-radius: 0.75rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--white);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.exp-number {
  font-size: 1.875rem;
  font-weight: 700;
}

.exp-text {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  text-align: center;
  line-height: 1.2;
}

.about-content h2 {
  font-size: 1.875rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.about-text {
  color: var(--neutral-600);
  line-height: 1.75;
}

.about-text p {
  margin-bottom: 1rem;
}

.social-links {
  display: flex;
  gap: 1rem;
  margin-top: 2.5rem;
}

.social-link {
  padding: 0.75rem;
  background: var(--neutral-100);
  border-radius: 0.5rem;
  transition: background 0.2s;
}

.social-link:hover {
  background: var(--neutral-200);
}

/* Certification Section */
.certification {
  padding: 6rem 1.5rem;
}

.section-header {
  max-width: 80rem;
  margin: 0 auto 4rem;
  text-align: center;
}

.section-header h2 {
  font-size: 1.875rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.section-header p {
  color: var(--neutral-600);
}

.cert-grid {
  max-width: 80rem;
  margin: 0 auto;
  display: grid;
  gap: 2rem;
}

@media (min-width: 640px) {
  .cert-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .cert-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.cert-card {
  padding: 2rem;
  background: var(--white);
  border: 1px solid var(--neutral-200);
  border-radius: 1rem;
  transition: all 0.2s;
}

.cert-card:hover {
  border-color: var(--primary);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.cert-icon {
  width: 3rem;
  height: 3rem;
  background: #eff6ff;
  color: var(--primary);
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

.cert-card:hover .cert-icon {
  background: var(--primary);
  color: var(--white);
}

.cert-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.cert-card p {
  font-size: 0.875rem;
  color: var(--neutral-500);
  margin-bottom: 1rem;
}

.cert-card a {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
}

.cert-card a:hover {
  text-decoration: underline;
}

/* Journey Section */
.journey {
  padding: 6rem 1.5rem;
  background: var(--white);
}

.journey-timeline {
  max-width: 48rem;
  margin: 0 auto;
}

.journey-item {
  position: relative;
  padding-left: 3rem;
  padding-bottom: 3rem;
  border-left: 2px solid var(--neutral-100);
}

.journey-item:last-child {
  padding-bottom: 0;
  border-left: none;
}

.journey-dot {
  position: absolute;
  left: -9px;
  top: 0;
  width: 1rem;
  height: 1rem;
  background: var(--primary);
  border: 4px solid var(--white);
  border-radius: 9999px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.journey-content {
  display: flex;
  flex-direction: column;
}

.journey-year {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--primary);
  background: #eff6ff;
  border-radius: 0.25rem;
  margin-bottom: 0.5rem;
  width: fit-content;
  font-style: italic;
}

.journey-item h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.journey-company {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--neutral-400);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.journey-content p {
  color: var(--neutral-600);
  line-height: 1.75;
}

/* Contact Section */
.contact {
  padding: 6rem 1.5rem;
}

.contact-card {
  max-width: 80rem;
  margin: 0 auto;
  background: var(--neutral-900);
  border-radius: 1.5rem;
  padding: 3rem 1.5rem;
  text-align: center;
  color: var(--white);
  position: relative;
  overflow: hidden;
}

@media (min-width: 768px) {
  .contact-card {
    padding: 5rem;
  }
}

.contact-card h2 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
  .contact-card h2 {
    font-size: 3rem;
  }
}

.contact-card > p {
  color: var(--neutral-400);
  font-size: 1.125rem;
  max-width: 36rem;
  margin: 0 auto 2.5rem;
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
  position: relative;
  z-index: 10;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--white);
  border-bottom: 1px solid var(--neutral-700);
  padding-bottom: 0.25rem;
  transition: color 0.2s;
}

.contact-link:hover {
  color: #60a5fa;
}

.contact-card::before,
.contact-card::after {
  content: '';
  position: absolute;
  border-radius: 9999px;
  filter: blur(100px);
}

.contact-card::before {
  bottom: -6rem;
  left: -6rem;
  width: 24rem;
  height: 24rem;
  background: rgba(37, 99, 235, 0.2);
}

.contact-card::after {
  top: -6rem;
  right: -6rem;
  width: 24rem;
  height: 24rem;
  background: rgba(167, 139, 250, 0.2);
}

/* Footer */
.footer {
  padding: 3rem 1.5rem;
  border-top: 1px solid var(--neutral-200);
}

.footer p {
  max-width: 80rem;
  margin: 0 auto;
  font-size: 0.875rem;
  color: var(--neutral-400);
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-content {
  animation: fadeInUp 0.6s ease-out;
}

/* Active nav link */
.nav-link.active {
  color: var(--primary);
}