* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: #1f2937;
  background: #f8fafc;
  line-height: 1.6;
}

a {
  color: inherit;
}

.site-header {
  background:
    linear-gradient(rgba(15, 23, 42, 0.86), rgba(15, 23, 42, 0.9)),
    radial-gradient(circle at top right, #2563eb, transparent 35%);
  color: white;
  min-height: 90vh;
}

.nav {
  width: min(1120px, 92%);
  margin: 0 auto;
  padding: 1.25rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-weight: 800;
  font-size: 1.25rem;
  text-decoration: none;
  letter-spacing: 0.03em;
}

.nav-links {
  display: flex;
  gap: 1.25rem;
}

.nav-links a {
  text-decoration: none;
  opacity: 0.88;
}

.nav-links a:hover {
  opacity: 1;
}

.nav-toggle {
  display: none;
  border: 0;
  background: transparent;
  color: white;
  font-size: 1.75rem;
  cursor: pointer;
}

.hero {
  width: min(1120px, 92%);
  margin: 0 auto;
  padding: 6rem 0;
  display: grid;
  grid-template-columns: 1.5fr 0.9fr;
  gap: 3rem;
  align-items: center;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: #38bdf8;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  font-weight: 800;
}

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4.9rem);
  line-height: 1.05;
  margin: 0;
}

.hero p {
  font-size: 1.12rem;
  color: #dbeafe;
  max-width: 700px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.button {
  display: inline-block;
  padding: 0.85rem 1.2rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
}

.primary {
  background: #38bdf8;
  color: #0f172a;
}

.secondary {
  border: 1px solid rgba(255, 255, 255, 0.45);
}

.hero-card {
  background: rgba(255, 255, 255, 0.09);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 24px;
  padding: 2rem;
  backdrop-filter: blur(14px);
}

.hero-card h2 {
  margin-top: 0;
}

.hero-card ul {
  padding-left: 1.25rem;
}

.section {
  width: min(1120px, 92%);
  margin: 0 auto;
  padding: 5rem 0;
}

.intro {
  max-width: 860px;
}

.section-heading {
  margin-bottom: 2rem;
}

.section h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin: 0;
  color: #0f172a;
}

.project-grid,
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.project-card,
.timeline-item {
  background: white;
  border: 1px solid #e5e7eb;
  border-radius: 20px;
  padding: 1.5rem;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.06);
}

.project-tag {
  display: inline-block;
  margin-bottom: 1rem;
  background: #e0f2fe;
  color: #075985;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 800;
}

.project-card h3,
.skills-grid h3,
.timeline-item h3 {
  margin-top: 0;
  color: #0f172a;
}

.dark-section {
  width: 100%;
  max-width: none;
  background: #0f172a;
  color: #e5e7eb;
  padding-left: max(4%, calc((100% - 1120px) / 2));
  padding-right: max(4%, calc((100% - 1120px) / 2));
}

.dark-section h2,
.dark-section h3 {
  color: white;
}

.skills-grid {
  grid-template-columns: repeat(4, 1fr);
}

.skills-grid > div {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1.35rem;
  border-radius: 18px;
}

.timeline {
  display: grid;
  gap: 1rem;
}

.date {
  color: #64748b;
  font-weight: 700;
}

.contact {
  text-align: center;
}

.contact-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.5rem;
}

.contact-links a {
  background: #0f172a;
  color: white;
  padding: 0.8rem 1rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
}

footer {
  text-align: center;
  padding: 2rem;
  background: #e5e7eb;
  color: #475569;
}

@media (max-width: 820px) {
  .nav {
    position: relative;
  }

  .nav-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 4.4rem;
    right: 0;
    left: 0;
    background: #0f172a;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 18px;
    padding: 1rem;
    flex-direction: column;
  }

  .nav-links.open {
    display: flex;
  }

  .hero {
    grid-template-columns: 1fr;
    padding: 4rem 0;
  }

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