:root {
  color-scheme: dark;
  --canvas: #101822;
  --panel: #16222e;
  --line: #314254;
  --text: #f1f5f9;
  --muted: #b6c4d2;
  --accent: #76e0d3;
  font-family: system-ui, "Segoe UI", sans-serif;
  line-height: 1.6;
}

*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; background: var(--canvas); color: var(--text); }
h1, h2, h3, p { margin: 0; }
h2, h3 { line-height: 1.2; }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.45rem); letter-spacing: -.035em; }
a { color: inherit; text-underline-offset: .25em; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
[id] { scroll-margin-top: 1.25rem; }

.shell { width: min(100% - 2rem, 71rem); margin-inline: auto; }
.skip-link {
  position: absolute;
  z-index: 2;
  top: .75rem;
  left: 1rem;
  padding: .65rem 1rem;
  background: var(--canvas);
  color: var(--accent);
  transform: translateY(-200%);
}
.skip-link:focus { transform: none; }

.site-header { background: #0d151f; border-bottom: 1px solid var(--line); }
.header-row { display: flex; align-items: center; justify-content: space-between; gap: .6rem 1.25rem; flex-wrap: wrap; min-height: 4.5rem; padding-block: .65rem; }
.brand { display: inline-flex; align-items: center; gap: .65rem; font-size: 1.08rem; font-weight: 750; text-decoration: none; }
.brand-mark { width: 1rem; height: 1rem; border: 2px solid var(--accent); border-radius: 3px; transform: rotate(45deg); }
nav { display: flex; gap: clamp(.65rem, 3vw, 1.75rem); flex-wrap: wrap; }
nav a { display: inline-flex; align-items: center; min-height: 2.75rem; color: var(--muted); text-decoration: none; font-size: .9rem; }
nav a:hover { color: var(--accent); text-decoration: underline; }

.hero {
  border-bottom: 1px solid var(--line);
  background: radial-gradient(ellipse at 92% 30%, #193941, transparent 66%), #111b28;
}
.hero-layout { display: grid; padding-block: clamp(3.25rem, 7vw, 6rem); }
.hero h1 { color: var(--accent); font-family: ui-monospace, Consolas, monospace; font-size: .88rem; font-weight: 700; letter-spacing: .13em; }
.tagline {
  margin-top: .9rem;
  max-width: 17ch;
  font-size: clamp(2.3rem, 5vw, 4.25rem);
  font-weight: 750;
  line-height: 1.05;
  letter-spacing: -.048em;
  text-wrap: balance;
}
.intro { max-width: 57ch; margin-top: 1.4rem; color: var(--muted); }
.button {
  display: inline-flex;
  gap: .8rem;
  align-items: center;
  margin-top: 1.75rem;
  min-height: 2.75rem;
  padding: .65rem 1rem;
  border-radius: .5rem;
  background: var(--accent);
  color: #10232a;
  font-weight: 750;
  text-decoration: none;
}
.button:hover { background: #a0f0e6; }

.hero-art { display: none; }

.portfolio { padding-block: clamp(2.75rem, 6vw, 4.75rem); }
.cards { display: grid; gap: 1rem; margin: 1.45rem 0 0; padding: 0; list-style: none; }
.card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: clamp(1.2rem, 3vw, 1.8rem);
  border: 1px solid var(--line);
  border-radius: .85rem;
  background: var(--panel);
}
.card-icon { display: grid; place-items: center; width: 2.8rem; height: 2.8rem; border: 1px solid #3b696c; border-radius: .65rem; background: #1b363e; color: var(--accent); font: 1.45rem "Segoe UI Symbol", system-ui, sans-serif; }
.card h3 { margin-top: .95rem; font-size: 1.32rem; letter-spacing: -.02em; }
.card p { margin: .5rem 0 1.3rem; color: var(--muted); }
.card-meta { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: .45rem .75rem; width: 100%; margin-top: auto; padding-top: .85rem; border-top: 1px solid var(--line); }
.status { display: inline-flex; align-items: center; gap: .5rem; color: var(--accent); font-size: .83rem; font-weight: 650; }
.status::before { content: ""; width: .4rem; height: .4rem; border: 1px solid currentColor; border-radius: 50%; }
.demo-note { display: flex; align-items: flex-start; gap: .9rem; margin-top: 1.5rem; padding: 1rem 1.15rem; border: 1px solid var(--line); border-radius: .65rem; color: var(--muted); font-size: .92rem; }
.info-icon { flex: 0 0 1.25rem; height: 1.25rem; margin-top: .15rem; border: 1px solid currentColor; border-radius: 50%; color: var(--accent); font: 700 .8rem/1.1rem system-ui, sans-serif; text-align: center; }
.site-footer { padding-block: 2.5rem; background: #0d151f; border-top: 1px solid var(--line); }
.site-footer h2 { font-size: 1.45rem; }
.site-footer p { margin-top: .45rem; color: var(--muted); }

@media (min-width: 44rem) {
  .shell { width: min(100% - 4rem, 71rem); }
  .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 60rem) {
  .hero-layout { grid-template-columns: 1.35fr 1fr; align-items: center; gap: 2rem; }
  .hero-art {
    display: grid;
    position: relative;
    place-items: center;
    min-width: 0;
    aspect-ratio: 1;
    background: radial-gradient(circle, #1a545550 0%, transparent 70%),
      repeating-linear-gradient(0deg, transparent 0 27px, #6ae0d21e 27px 28px),
      repeating-linear-gradient(90deg, transparent 0 27px, #6ae0d21e 27px 28px);
    mask-image: radial-gradient(ellipse, #000 55%, transparent 75%);
  }
  .orbit { position: absolute; aspect-ratio: 1; border: 1px solid #76e0d376; border-radius: 50%; }
  .orbit-outer { width: 75%; border-style: dashed; }
  .orbit-inner { width: 56%; box-shadow: 0 0 2rem #76e0d323; }
  .core {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: .35rem;
    padding: .85rem;
    width: 23%;
    aspect-ratio: 1;
    transform: rotate(45deg);
    border: 1px solid var(--accent);
    background: #1b414a;
    border-radius: 1.15rem;
    box-shadow: 0 0 2rem #76e0d354;
  }
  .core span { background: var(--accent); border-radius: .25rem; }
  .core span:nth-child(2), .core span:nth-child(3) { opacity: .42; }
  .node { position: absolute; width: .65rem; height: .65rem; border: 1px solid var(--accent); border-radius: 50%; background: #1b414a; transform: translate(-50%, -50%); }
  .node-top { top: 12.5%; left: 50%; }
  .node-right { top: 50%; left: 87.5%; }
  .node-bottom { top: 87.5%; left: 50%; }
  .node-left { top: 50%; left: 12.5%; }
}

.intro + .intro { margin-top: .8rem; }
.project-link { display: inline-flex; align-items: center; gap: .4rem; min-height: 2.75rem; color: var(--accent); font-weight: 650; }
.project-link:hover { color: var(--text); }
.skills { padding-bottom: clamp(2.75rem, 6vw, 4.75rem); }
.skills-grid { display: grid; gap: .75rem; margin: 1rem 0 0; }
.skills-grid div { padding: .8rem 1rem; border-left: 2px solid var(--line); }
.skills-grid dt { font-weight: 700; }
.skills-grid dd { margin: 0; color: var(--muted); }
.project-hero { padding-block: clamp(3.25rem, 7vw, 6rem); }
.hero h1.project-title { color: var(--text); font: inherit; font-size: clamp(2.3rem, 5vw, 4.25rem); font-weight: 750; line-height: 1.05; letter-spacing: -.048em; }
.site-footer p { max-width: 70ch; }

@media (min-width: 44rem) {
  .skills-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 60rem) {
  .skills-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}