:root {
  --bg: #08111f;
  --surface: #0d1828;
  --surface-2: #111f33;
  --text: #f3f7fb;
  --muted: #a9b7c8;
  --line: rgba(255,255,255,.10);
  --accent: #25a9ff;
  --accent-2: #61d1ff;
  --max: 1160px;
  --radius: 18px;
  --shadow: 0 20px 60px rgba(0,0,0,.22);
}

body.light {
  --bg: #f6f9fc;
  --surface: #ffffff;
  --surface-2: #eef4f8;
  --text: #102033;
  --muted: #5d6b7b;
  --line: rgba(16,32,51,.11);
  --accent: #087fd0;
  --accent-2: #0b9fe8;
  --shadow: 0 18px 45px rgba(16,32,51,.10);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font: inherit; }

.container {
  width: min(var(--max), calc(100% - 40px));
  margin-inline: auto;
}

.section { padding: 96px 0; }
.section-muted {
  background:
    radial-gradient(circle at 10% 20%, rgba(37,169,255,.08), transparent 28%),
    var(--surface);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--line);
}
.nav {
  min-height: 72px;
  display: flex;
  align-items: center;
  gap: 30px;
}
.brand {
  font-weight: 900;
  letter-spacing: .08em;
  font-size: 1.05rem;
  margin-right: auto;
}
.brand span { color: var(--accent-2); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}
.nav-links a {
  color: var(--muted);
  font-size: .92rem;
  transition: color .2s ease;
}
.nav-links a:hover { color: var(--text); }

.theme-toggle,
.menu-toggle {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}
.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
}
.menu-toggle {
  display: none;
  padding: 9px;
  border-radius: 10px;
}
.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  margin: 4px;
  background: var(--text);
}

.hero {
  min-height: calc(100vh - 72px);
  display: grid;
  align-items: center;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 75% 35%, rgba(37,169,255,.14), transparent 28%),
    radial-gradient(circle at 10% 80%, rgba(97,209,255,.08), transparent 25%);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.02fr .98fr;
  gap: 64px;
  align-items: center;
}
.eyebrow {
  color: var(--accent-2);
  font-size: .76rem;
  font-weight: 800;
  letter-spacing: .16em;
  margin: 0 0 14px;
}
.hero h1 {
  font-size: clamp(2.6rem, 5.2vw, 5.2rem);
  line-height: .98;
  letter-spacing: -.055em;
  margin: 0 0 24px;
  max-width: 850px;
}
.hero h1 span { color: var(--accent-2); }
.hero-text {
  max-width: 650px;
  font-size: 1.12rem;
  color: var(--muted);
  margin: 0 0 30px;
}
.hero-actions,
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 11px;
  border: 1px solid transparent;
  font-weight: 750;
  transition: transform .2s ease, background .2s ease, border-color .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  color: #04111c;
  background: var(--accent-2);
}
.btn-secondary {
  border-color: var(--line);
  background: var(--surface);
}
.tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 28px;
}
.tech-list span,
.tags span {
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255,255,255,.025);
  font-size: .78rem;
}
.hero-card {
  border: 1px solid var(--line);
  border-radius: 22px;
  overflow: hidden;
  box-shadow: var(--shadow);
  background: var(--surface);
}
.hero-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.two-columns {
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: 90px;
}
h2 {
  font-size: clamp(2rem, 3.5vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: -.04em;
  margin: 0;
}
.section-text {
  color: var(--muted);
  font-size: 1.05rem;
}
.section-text p { margin-top: 0; margin-bottom: 18px; }

.section-heading { margin-bottom: 42px; }
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.skill-card,
.project-card,
.process-step {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.skill-card {
  padding: 26px;
  min-height: 190px;
}
.skill-icon {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: rgba(37,169,255,.10);
  color: var(--accent-2);
  font-weight: 800;
  font-size: .8rem;
  margin-bottom: 22px;
}
.skill-card h3,
.project-card h3,
.process-step h3 {
  margin: 0 0 8px;
  font-size: 1.15rem;
}
.skill-card p,
.project-card p,
.process-step p {
  color: var(--muted);
  margin: 0;
}

.projects-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 30px;
}
.projects-heading > p {
  max-width: 420px;
  color: var(--muted);
}
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.project-card {
  display: grid;
  grid-template-columns: 68px 1fr;
  overflow: hidden;
  min-height: 290px;
}
.project-number {
  padding: 26px 16px;
  color: var(--accent-2);
  font-weight: 900;
  font-size: .8rem;
  border-right: 1px solid var(--line);
}
.project-content { padding: 26px; }
.project-type {
  color: var(--accent-2) !important;
  font-size: .72rem !important;
  font-weight: 800;
  letter-spacing: .12em;
  margin-bottom: 12px !important;
}
.project-content h3 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 22px;
}
.project-link {
  display: inline-block;
  margin-top: 22px;
  color: var(--accent-2);
  font-weight: 800;
}
.github-callout {
  margin-top: 16px;
  padding: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(100deg, rgba(37,169,255,.10), transparent),
    var(--surface);
}
.github-callout h3 { margin: 0; font-size: 1.25rem; }

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.process-step { padding: 26px; }
.process-step > span {
  color: var(--accent-2);
  font-size: .8rem;
  font-weight: 900;
  display: inline-block;
  margin-bottom: 28px;
}

.cta-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  padding: 48px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background:
    radial-gradient(circle at 80% 20%, rgba(37,169,255,.14), transparent 28%),
    var(--surface);
  box-shadow: var(--shadow);
}
.cta-box p:not(.eyebrow) { color: var(--muted); max-width: 650px; }

.footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
}
.footer-inner {
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  font-size: .85rem;
}
.footer a { color: var(--accent-2); }

@media (max-width: 900px) {
  .hero-grid,
  .two-columns {
    grid-template-columns: 1fr;
    gap: 45px;
  }
  .hero { padding-top: 70px; }
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-card { max-width: 720px; }
}

@media (max-width: 700px) {
  .container { width: min(var(--max), calc(100% - 28px)); }
  .section { padding: 72px 0; }
  .nav { gap: 10px; }
  .menu-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    left: 14px;
    right: 14px;
    top: 68px;
    padding: 14px;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--surface);
    box-shadow: var(--shadow);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 11px 12px; }
  .skills-grid,
  .projects-grid,
  .process-grid {
    grid-template-columns: 1fr;
  }
  .projects-heading,
  .github-callout,
  .cta-box {
    align-items: flex-start;
    flex-direction: column;
  }
  .cta-box { padding: 30px; }
  .hero h1 { font-size: clamp(2.5rem, 14vw, 4rem); }
  .hero-card { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}