:root {
  --bg: #0b0f14;
  --panel: #121821;
  --panel-2: #18212d;
  --text: #eef4fb;
  --muted: #9aa9ba;
  --line: #273241;
  --accent: #7dd3fc;
  --accent-2: #bae6fd;
  --max: 1120px;
}

* { 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;
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(125, 211, 252, 0.08), transparent 30rem),
    var(--bg);
  line-height: 1.6;
}

a { color: inherit; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem max(1.25rem, calc((100vw - var(--max)) / 2));
  border-bottom: 1px solid rgba(255,255,255,0.06);
  background: rgba(11, 15, 20, 0.88);
  backdrop-filter: blur(12px);
}

.brand {
  font-size: 1.45rem;
  font-weight: 800;
  text-decoration: none;
  letter-spacing: -0.04em;
}
.brand span { color: var(--accent); }

nav { display: flex; gap: 1.1rem; flex-wrap: wrap; }
nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}
nav a:hover { color: var(--text); }

.section-shell {
  width: min(var(--max), calc(100% - 2.5rem));
  margin-inline: auto;
}

.hero {
  min-height: 82vh;
  display: grid;
  align-content: center;
  padding-block: 6rem 4rem;
}

.eyebrow {
  margin: 0 0 0.85rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  font-weight: 800;
}

h1, h2, h3 { line-height: 1.08; margin-top: 0; }
h1 {
  max-width: 900px;
  margin-bottom: 1.3rem;
  font-size: clamp(3rem, 8vw, 6.5rem);
  letter-spacing: -0.055em;
}
h1 span { color: var(--accent-2); }
h2 {
  margin-bottom: 0.75rem;
  font-size: clamp(2.2rem, 5vw, 4rem);
  letter-spacing: -0.045em;
}
h3 { font-size: 1.45rem; letter-spacing: -0.025em; }

.hero-copy {
  max-width: 760px;
  margin: 0 0 2rem;
  color: var(--muted);
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
}

.hero-actions { display: flex; gap: 0.85rem; flex-wrap: wrap; }
.button {
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 0.75rem 1rem;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  text-decoration: none;
  font-weight: 700;
}
.button.primary {
  color: #061018;
  border-color: var(--accent);
  background: var(--accent);
}
.button.secondary { background: rgba(255,255,255,0.02); }
.button:hover { transform: translateY(-1px); }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 4rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.hero-stats div { padding: 1.2rem 1rem 1.2rem 0; }
.hero-stats div + div { border-left: 1px solid var(--line); padding-left: 1.2rem; }
.hero-stats strong, .hero-stats span { display: block; }
.hero-stats span { color: var(--muted); font-size: 0.92rem; }

.section-block { padding-block: 6rem; }
.section-heading { max-width: 760px; margin-bottom: 2.3rem; }
.section-heading > p:last-child { color: var(--muted); }

.project-grid { display: grid; gap: 1rem; }
.project-card {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 1rem;
  padding: 1.45rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: linear-gradient(180deg, rgba(255,255,255,0.025), rgba(255,255,255,0.01));
}
.project-card.featured {
  background: linear-gradient(180deg, rgba(125,211,252,0.08), rgba(255,255,255,0.015));
}
.project-index {
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.88rem;
}
.project-type {
  margin: 0 0 0.45rem;
  color: var(--accent);
  font-size: 0.86rem;
  font-weight: 700;
}
.project-body > p:not(.project-type):not(.status) { max-width: 820px; color: var(--muted); }
.tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  padding: 0;
  margin: 1rem 0;
  list-style: none;
}
.tags li {
  padding: 0.35rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: #c7d3df;
  font-size: 0.8rem;
}
.card-links { display: flex; gap: 1rem; flex-wrap: wrap; }
.card-links a { color: var(--accent-2); font-weight: 700; text-decoration: none; }
.status { margin-bottom: 0; color: #718096; font-size: 0.9rem; font-style: italic; }

.skills-section { border-top: 1px solid var(--line); }
.skill-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.skill-group {
  padding: 1.4rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--panel);
}
.skill-group p { margin-bottom: 0; color: var(--muted); }

.about-section { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 4rem; border-top: 1px solid var(--line); }
.about-copy { color: var(--muted); font-size: 1.08rem; }
.about-copy p:first-child { margin-top: 0; }

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 2rem 3rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}
.site-footer a { text-decoration: none; }

.case-hero { padding-block: 6rem 3rem; max-width: 900px; }
.back-link { display: inline-block; margin-bottom: 2rem; color: var(--muted); text-decoration: none; }
.case-content { max-width: 850px; padding-bottom: 6rem; }
.case-content section { margin-top: 3.2rem; }
.case-content h2 { font-size: 2rem; }
.case-content p, .case-content li { color: var(--muted); }
.architecture {
  overflow-x: auto;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: 0.8rem;
  background: #080b0f;
  color: #d8e3ed;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  white-space: pre;
}

@media (max-width: 760px) {
  .site-header { align-items: flex-start; }
  nav { justify-content: flex-end; gap: 0.65rem 0.9rem; }
  .hero { min-height: auto; padding-top: 5rem; }
  .hero-stats, .skill-grid, .about-section { grid-template-columns: 1fr; }
  .hero-stats div + div { border-left: 0; border-top: 1px solid var(--line); padding-left: 0; }
  .project-card { grid-template-columns: 1fr; }
  .about-section { gap: 1rem; }
  .site-footer { flex-direction: column; }
}

@media (prefers-reduced-motion: no-preference) {
  .button, .project-card { transition: transform 160ms ease, border-color 160ms ease; }
  .project-card:hover { transform: translateY(-2px); border-color: #3a4a5e; }
}