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

:root {
  --bg: #080e1c;
  --surface: #0d1628;
  --border: #1a2438;
  --text: #e2e2e2;
  --muted: #666;
  --muted-light: #888;
  --accent: #d4a853;
  --accent-dim: rgba(212, 168, 83, 0.08);
  --font-body: 'Inter', system-ui, sans-serif;
  --font-display: 'Syne', system-ui, sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.2s;
}

a:hover {
  opacity: 0.75;
}

/* ── Sidebar ── */
.sidebar-links {
  position: fixed;
  left: 2rem;
  bottom: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  z-index: 20;
}

.sidebar-links a {
  color: var(--muted);
  transition: color 0.2s, transform 0.2s;
}

.sidebar-links a:hover {
  color: var(--accent);
  transform: translateY(-2px);
  opacity: 1;
}

.sidebar-line {
  width: 1px;
  height: 80px;
  background: var(--border);
  margin-top: 0.5rem;
}

/* ── Nav ── */
header {
  position: sticky;
  top: 0;
  background: rgba(8, 14, 28, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}

nav {
  max-width: 900px;
  margin: 0 auto;
  padding: 1.1rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--accent);
  margin-right: auto;
}

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

nav ul a {
  color: var(--muted-light);
  font-size: 0.875rem;
  letter-spacing: 0.02em;
}

nav ul a:hover {
  color: var(--text);
  opacity: 1;
}

.nav-journey {
  font-size: 0.875rem;
  color: var(--accent);
  border: 1px solid rgba(212, 168, 83, 0.3);
  padding: 0.35rem 0.85rem;
  border-radius: 4px;
  transition: background 0.2s;
  white-space: nowrap;
}

.nav-journey:hover {
  background: var(--accent-dim);
  opacity: 1;
}

/* ── Layout ── */
main {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.5rem 0 5rem;
}

section {
  padding: 6rem 0;
  border-bottom: 1px solid var(--border);
}

section:last-child {
  border-bottom: none;
}

.section-label {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 2.5rem;
  font-weight: 500;
}

/* ── Star twinkle animation ── */
@keyframes twinkle {
  0%, 100% { opacity: 0.7; transform: scale(1); }
  50%       { opacity: 0.2; transform: scale(0.6); }
}
.star-twinkle { animation: twinkle 3s ease-in-out infinite; }
.star-twinkle.s1 { animation-duration: 2.8s; }
.star-twinkle.s2 { animation-duration: 3.6s; animation-delay: 1.1s; }
.star-twinkle.s3 { animation-duration: 4.2s; animation-delay: 2.3s; }

/* ── Hero ── */
#hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 2rem;
  padding-top: 5rem;
  padding-bottom: 5rem;
}

.hero-content {
  /* text lives here */
}

.hero-illustration {
  display: flex;
  justify-content: flex-end;
  align-items: center;
}

.hero-illustration svg {
  width: 100%;
  max-width: 480px;
  aspect-ratio: 560 / 440;
  display: block;
  border-radius: 16px;
  border: 1px solid #1a1a1a;
}

.hero-label {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1.5rem;
}

#hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6vw, 5rem);
  font-weight: 800;
  line-height: 1.05;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.highlight {
  color: var(--accent);
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--muted-light);
  margin-bottom: 1.25rem;
  font-weight: 500;
}

.hero-desc {
  max-width: 520px;
  color: var(--muted-light);
  font-size: 0.975rem;
  line-height: 1.8;
  margin-bottom: 2.5rem;
}

.hero-desc strong {
  color: var(--text);
  font-weight: 600;
}

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

.btn-primary {
  background: var(--accent);
  color: #0a0a0a;
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.7rem 1.5rem;
  border-radius: 4px;
  transition: opacity 0.2s;
  letter-spacing: 0.01em;
}

.btn-primary:hover {
  opacity: 0.85;
}

.btn-ghost {
  color: var(--text);
  font-size: 0.875rem;
  padding: 0.7rem 1.5rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  transition: border-color 0.2s;
}

.btn-ghost:hover {
  border-color: var(--muted);
  opacity: 1;
}

/* ── About ── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4rem;
  align-items: start;
}

.about-text p {
  color: var(--muted-light);
  margin-bottom: 1rem;
  font-size: 0.975rem;
  max-width: 540px;
}

.about-text p:last-child {
  margin-bottom: 0;
}

.about-text a {
  color: var(--text);
  border-bottom: 1px solid var(--border);
}

.about-text a:hover {
  border-color: var(--accent);
  opacity: 1;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem 2rem;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ── Timeline ── */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.timeline-item {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 2rem;
  padding: 2rem 0;
  border-bottom: 1px solid var(--border);
  position: relative;
}

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

.timeline-item::before {
  content: '';
  position: absolute;
  left: 176px;
  top: 2.6rem;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.6;
}

.timeline-meta {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding-top: 0.1rem;
}

.timeline-period {
  font-size: 0.8rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.timeline-location {
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.7;
}

.timeline-content h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.timeline-at {
  color: var(--accent);
  font-weight: 500;
}

.timeline-content p {
  font-size: 0.9rem;
  color: var(--muted-light);
  line-height: 1.75;
  margin-bottom: 1rem;
  max-width: 560px;
}

/* ── Tags ── */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tags span {
  font-size: 0.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--muted-light);
  padding: 0.2rem 0.6rem;
  border-radius: 3px;
  letter-spacing: 0.02em;
}

/* ── Skills ── */
.skills-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem 3rem;
}

.skill-group h4 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: 0.75rem;
  font-weight: 500;
}

/* ── Contact ── */
.contact-block {
  max-width: 500px;
}

.contact-block h2 {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.contact-block p {
  color: var(--muted-light);
  font-size: 0.975rem;
  margin-bottom: 2rem;
}

.contact-links {
  display: flex;
  gap: 1.5rem;
  margin-top: 1.5rem;
  font-size: 0.875rem;
}

.contact-links a {
  color: var(--muted-light);
}

.contact-links a:hover {
  color: var(--accent);
  opacity: 1;
}

/* ── Footer ── */
footer {
  text-align: center;
  padding: 2.5rem 1.5rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.8rem;
}

footer a {
  color: var(--muted);
}

footer a:hover {
  color: var(--text);
  opacity: 1;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .sidebar-links {
    display: none;
  }

  main {
    padding: 0 1.25rem;
  }

  nav ul {
    display: none;
  }

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

  .hero-illustration {
    display: none;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

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

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .timeline-item::before {
    display: none;
  }

  .timeline-meta {
    flex-direction: row;
    gap: 1rem;
    align-items: center;
  }

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

  #hero {
    padding-top: 4rem;
  }
}

@media (max-width: 480px) {
  .about-stats {
    grid-template-columns: 1fr 1fr;
  }
}