:root {
  --bg: #0b1220;
  --bg-muted: #111a2e;
  --card: #162036;
  --card-border: rgba(255, 255, 255, 0.08);
  --text: #e8edf7;
  --text-muted: #9aa8c0;
  --accent: #3b82f6;
  --accent-soft: rgba(59, 130, 246, 0.14);
  --accent-2: #22d3ee;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  --radius: 18px;
  --container: 1120px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Manrope", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

img {
  max-width: 100%;
  display: block;
}

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

ul {
  margin: 0;
  padding-left: 1.2rem;
}

.container {
  width: min(calc(100% - 2rem), var(--container));
  margin: 0 auto;
}

.eyebrow {
  margin: 0 0 0.5rem;
  color: var(--accent-2);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(11, 18, 32, 0.82);
  border-bottom: 1px solid var(--card-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
}

.logo {
  font-weight: 800;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-links a {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--text);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--card-border);
  border-radius: 12px;
  background: transparent;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--text);
}

.hero {
  padding: 5rem 0 3rem;
  background:
    radial-gradient(circle at top right, rgba(59, 130, 246, 0.18), transparent 30%),
    radial-gradient(circle at 20% 20%, rgba(34, 211, 238, 0.08), transparent 25%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: center;
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(2.4rem, 5vw, 4rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.hero-role {
  margin: 0 0 1rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: #cbd5e1;
}

.hero-text {
  margin: 0 0 2rem;
  max-width: 58ch;
  color: var(--text-muted);
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 1.25rem;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #2563eb);
  color: white;
  box-shadow: 0 12px 30px rgba(37, 99, 235, 0.35);
}

.btn-secondary {
  border: 1px solid var(--card-border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
}

.hero-photo-wrap {
  position: relative;
  justify-self: center;
}

.hero-photo {
  width: min(100%, 320px);
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 28px;
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
}

.hero-badge {
  position: absolute;
  left: -1rem;
  bottom: 1.5rem;
  padding: 0.9rem 1rem;
  border-radius: 16px;
  background: rgba(17, 26, 46, 0.92);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(10px);
}

.hero-badge-label {
  display: block;
  color: var(--text-muted);
  font-size: 0.78rem;
  margin-bottom: 0.15rem;
}

.stats {
  padding: 0 0 2rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.stat-card {
  padding: 1.25rem 1.35rem;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--card-border);
}

.stat-card strong {
  display: block;
  font-size: 1.8rem;
  line-height: 1.1;
  margin-bottom: 0.35rem;
}

.stat-card span {
  color: var(--text-muted);
  font-size: 0.92rem;
}

.section {
  padding: 4.5rem 0;
}

.section-muted {
  background: var(--bg-muted);
}

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

.section-head h2 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  letter-spacing: -0.03em;
}

.section-sub {
  margin: 0.75rem 0 0;
  max-width: 62ch;
  color: var(--text-muted);
}

.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.9fr;
  gap: 1.5rem;
}

.about-text p {
  color: var(--text-muted);
  margin-top: 0;
}

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

.about-card,
.info-card,
.contact-card,
.timeline-body {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
}

.about-card {
  padding: 1.5rem;
}

.about-card h3,
.skill-group h3 {
  margin-top: 0;
}

.about-card ul {
  padding-left: 1.1rem;
  color: var(--text-muted);
}

.about-card li + li {
  margin-top: 0.55rem;
}

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

.skill-group-ai {
  margin-bottom: 1rem;
  padding: 1.5rem;
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(59, 130, 246, 0.12), rgba(34, 211, 238, 0.08)),
    var(--card);
  border: 1px solid rgba(59, 130, 246, 0.28);
  box-shadow: 0 16px 40px rgba(37, 99, 235, 0.12);
}

.skill-group-ai h3 {
  margin-top: 0;
  color: #dbeafe;
}

.skills-grid-secondary {
  margin-top: 0;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.project-card {
  padding: 1.35rem 1.5rem;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--card-border);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.project-card:hover {
  transform: translateY(-2px);
  border-color: rgba(34, 211, 238, 0.25);
}

.project-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.project-type,
.project-status {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.project-type {
  color: var(--accent-2);
}

.project-status {
  color: var(--text-muted);
}

.project-card h3 {
  margin: 0 0 0.65rem;
  font-size: 1.15rem;
}

.project-card p {
  margin: 0 0 1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.projects-grid-featured {
  margin-bottom: 2rem;
}

.project-card-hero {
  grid-column: 1 / -1;
}

.project-card-featured {
  border-color: rgba(59, 130, 246, 0.22);
  background:
    linear-gradient(180deg, rgba(59, 130, 246, 0.08), transparent 120px),
    var(--card);
}

.project-type-accent {
  color: #93c5fd;
}

.project-list {
  margin: 0 0 1rem;
  padding-left: 1.1rem;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.project-list li + li {
  margin-top: 0.35rem;
}

.project-link {
  display: inline-flex;
  margin-bottom: 0.85rem;
  color: var(--accent-2);
  font-weight: 700;
}

.project-link:hover {
  color: #67e8f9;
}

.project-qr {
  display: inline-block;
  margin-bottom: 1rem;
  padding: 0.45rem;
  border-radius: 1rem;
  background: #fff;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.project-qr:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.32);
}

.project-qr img {
  display: block;
  width: 180px;
  height: auto;
  border-radius: 0.75rem;
}

.section-head-compact {
  margin-bottom: 1rem;
}

.section-head-compact h3 {
  margin: 0;
  font-size: 1.2rem;
  color: #cbd5e1;
}

.cert-block {
  margin-top: 2.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--card-border);
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.cert-card {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 1rem;
  padding: 1rem;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--card-border);
}

.cert-image-link {
  display: block;
  overflow: hidden;
  border-radius: 12px;
  border: 1px solid var(--card-border);
  background: #fff;
}

.cert-image-link img {
  width: 100%;
  height: 100%;
  min-height: 280px;
  object-fit: cover;
  object-position: top;
  transition: transform 0.25s ease;
}

.cert-image-link:hover img {
  transform: scale(1.02);
}

.cert-body h3 {
  margin: 0.35rem 0 0.5rem;
}

.cert-body p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.skill-group {
  padding: 1.35rem;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--card-border);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.tags span {
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: #dbeafe;
  font-size: 0.88rem;
  font-weight: 600;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: 1.5rem;
  color: var(--text-muted);
}

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

.timeline-item {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 1.25rem;
}

.timeline-meta {
  padding-top: 1.35rem;
}

.timeline-meta time,
.info-year {
  display: block;
  font-weight: 800;
  color: var(--accent-2);
}

.timeline-meta span,
.timeline-company,
.timeline-note {
  color: var(--text-muted);
  font-size: 0.92rem;
}

.timeline-body {
  padding: 1.35rem 1.5rem;
}

.timeline-body h3 {
  margin: 0 0 0.35rem;
  font-size: 1.25rem;
}

.timeline-role {
  margin: 0 0 0.85rem;
  font-weight: 700;
}

.timeline-body li {
  color: var(--text-muted);
  margin-bottom: 0.45rem;
}

.timeline-note {
  margin: 1rem 0 0;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.cards-grid-chrono {
  counter-reset: edu-step;
}

.cards-grid-chrono .info-card {
  position: relative;
}

.cards-grid-chrono .info-card::before {
  counter-increment: edu-step;
  content: counter(edu-step, decimal-leading-zero);
  position: absolute;
  top: 1.1rem;
  right: 1.2rem;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: rgba(154, 168, 192, 0.45);
}

.info-card {
  padding: 1.35rem 1.5rem;
}

.info-card h3 {
  margin: 0.35rem 0 0.5rem;
}

.info-card p {
  margin: 0;
  color: var(--text-muted);
}

.contact-wrap {
  text-align: left;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.contact-card {
  padding: 1.35rem 1.5rem;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.contact-card:hover {
  transform: translateY(-2px);
  border-color: rgba(59, 130, 246, 0.35);
  background: rgba(59, 130, 246, 0.08);
}

.contact-card span {
  display: block;
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-bottom: 0.35rem;
}

.contact-card-static:hover {
  transform: none;
  background: var(--card);
  border-color: var(--card-border);
}

.footer {
  padding: 1.5rem 0 2rem;
  border-top: 1px solid var(--card-border);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--text-muted);
  font-size: 0.92rem;
}

@media (max-width: 960px) {
  .hero-grid,
  .about-grid,
  .skills-grid,
  .skills-grid-secondary,
  .projects-grid,
  .projects-grid-featured,
  .cert-grid,
  .stats-grid,
  .cards-grid,
  .contact-grid {
    grid-template-columns: 1fr 1fr;
  }

  .cert-card {
    grid-template-columns: 1fr;
  }

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

  .hero-photo-wrap {
    order: -1;
  }

  .timeline-item {
    grid-template-columns: 1fr;
  }

  .timeline-meta {
    padding-top: 0;
  }
}

@media (max-width: 720px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: absolute;
    top: 72px;
    left: 1rem;
    right: 1rem;
    flex-direction: column;
    padding: 1rem;
    border-radius: var(--radius);
    background: var(--card);
    border: 1px solid var(--card-border);
    display: none;
  }

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

  .stats-grid,
  .skills-grid,
  .skills-grid-secondary,
  .projects-grid,
  .projects-grid-featured,
  .cert-grid,
  .cards-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 3rem;
  }

  .hero-badge {
    left: 0.75rem;
    bottom: 0.75rem;
  }
}