/* rungzero.dev — one stylesheet for every page */
:root {
  --bg: #0b1424; --bg2: #0f1b30; --panel: #13223c; --line: #22365a; --rail: #35537f;
  --ink: #e9eef7; --ink2: #b3c0d6; --ink3: #7486a4;
  --accent: #ff7a1a; --accent2: #ffb27a; --live: #3ccf8e; --wip: #f5c542;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.6 var(--sans);
  background-image: linear-gradient(var(--bg2) 1px, transparent 1px), linear-gradient(90deg, var(--bg2) 1px, transparent 1px);
  background-size: 32px 32px; }
a { color: var(--accent2); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }
.wrap { max-width: 1060px; margin: 0 auto; padding: 0 20px; }

/* top bar */
.top { position: sticky; top: 0; z-index: 10; background: rgba(11, 20, 36, .88); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; gap: 18px; height: 58px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font: 700 17px/1 var(--mono); letter-spacing: .02em; }
.brand:hover { text-decoration: none; }
.brand svg { flex: none; }
.brand b { color: var(--accent); font-weight: 700; }
.top nav { margin-left: auto; display: flex; gap: 4px; white-space: nowrap; }
.top nav a { color: var(--ink2); font: 600 13px/1 var(--mono); padding: 8px 10px; border-radius: 6px; }
.top nav a:hover, .top nav a.on { color: var(--ink); background: var(--panel); text-decoration: none; }

/* the ladder: two rails with rungs between them */
.ladder { position: relative; padding: 0 0 0 34px; }
.ladder::before { content: ""; position: absolute; left: 10px; top: 0; bottom: 0; width: 3px; background: var(--rail); border-radius: 2px; }
.rung { position: relative; padding: 56px 0 8px; }
.rung > h2 { display: flex; align-items: center; gap: 12px; margin: 0 0 18px; font: 700 13px/1 var(--mono); text-transform: uppercase;
  letter-spacing: .14em; color: var(--ink2); }
.rung > h2::before { content: ""; width: 22px; height: 3px; background: var(--rail); margin-left: -24px; }
.rung > h2::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.rung > h2 .n { color: var(--accent); font-weight: 600; margin-right: -2px; }

/* hero */
.hero { padding: 72px 0 10px; }
.hero .kicker { font: 600 13px/1 var(--mono); color: var(--accent); letter-spacing: .08em; }
.hero h1 { font-size: clamp(36px, 6vw, 60px); line-height: 1.05; margin: 14px 0 16px; letter-spacing: -.02em; }
.hero p.lead { font-size: clamp(17px, 2.2vw, 20px); color: var(--ink2); max-width: 680px; margin: 0; }
.hero .chips { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 22px; }
.rungline { margin: 34px 0 0; color: var(--rail); }
.rungline text { font: 600 12px var(--mono); fill: var(--ink3); }

.chip { display: inline-block; font: 600 12px/1 var(--mono); color: var(--ink2); border: 1px solid var(--line); background: var(--panel);
  padding: 6px 9px; border-radius: 999px; }

/* about */
.about { display: grid; grid-template-columns: 1.4fr 1fr; gap: 28px; }
.about p { margin: 0 0 14px; color: var(--ink2); }
.about p:first-child { color: var(--ink); }
.facts { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; font-size: 14px; }
.facts dt { font: 600 11px/1 var(--mono); color: var(--ink3); text-transform: uppercase; letter-spacing: .1em; margin-top: 12px; }
.facts dt:first-child { margin-top: 0; }
.facts dd { margin: 5px 0 0; color: var(--ink); }

/* project cards */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.card { position: relative; display: flex; flex-direction: column; background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  padding: 18px 18px 16px; color: var(--ink); transition: border-color .15s, transform .15s; }
a.card:hover { border-color: var(--accent); transform: translateY(-2px); text-decoration: none; }
.card.feature { grid-column: 1 / -1; display: grid; grid-template-columns: 1.1fr 1fr; gap: 22px; padding: 22px; }
.card h3 { margin: 6px 0 8px; font-size: 19px; line-height: 1.25; }
.card.feature h3 { font-size: 26px; }
.card p { margin: 0 0 14px; color: var(--ink2); font-size: 15px; }
.card .tags { margin-top: auto; display: flex; gap: 6px; flex-wrap: wrap; }
.card .tags span { font: 600 11px/1 var(--mono); color: var(--ink3); border: 1px solid var(--line); padding: 4px 7px; border-radius: 5px; }
.card .more { font: 600 13px/1 var(--mono); color: var(--accent); margin-top: 14px; }
.status { display: inline-flex; align-items: center; gap: 7px; font: 600 11px/1 var(--mono); text-transform: uppercase; letter-spacing: .1em; color: var(--ink3); }
.status::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--ink3); box-shadow: 0 0 0 3px rgba(116, 134, 164, .15); }
.status.live { color: var(--live); } .status.live::before { background: var(--live); box-shadow: 0 0 0 3px rgba(60, 207, 142, .18); }
.status.wip { color: var(--wip); } .status.wip::before { background: var(--wip); box-shadow: 0 0 0 3px rgba(245, 197, 66, .16); }
.art { border-radius: 10px; border: 1px solid var(--line); background: #08101d; overflow: hidden; min-height: 220px; display: flex; }
.art svg { width: 100%; height: 100%; display: block; }

/* project page */
.page-hero { padding: 56px 0 6px; }
.page-hero .crumb { font: 600 13px/1 var(--mono); color: var(--ink3); }
.page-hero h1 { font-size: clamp(32px, 5vw, 50px); line-height: 1.08; margin: 12px 0 14px; letter-spacing: -.015em; }
.page-hero p.lead { font-size: 19px; color: var(--ink2); max-width: 720px; margin: 0 0 22px; }
.btn { display: inline-flex; align-items: center; gap: 8px; font: 700 14px/1 var(--mono); padding: 12px 16px; border-radius: 8px;
  background: var(--accent); color: #1a0d02; border: 1px solid var(--accent); }
.btn:hover { text-decoration: none; filter: brightness(1.08); }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btns { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.note { font-size: 13px; color: var(--ink3); }
.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }
.box { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 18px; }
.box h3 { margin: 0 0 8px; font-size: 17px; }
.box p, .box li { color: var(--ink2); font-size: 15px; }
.box p { margin: 0; }
.box ul { margin: 0; padding-left: 18px; }
.prose { max-width: 760px; color: var(--ink2); }
.prose p { margin: 0 0 14px; }
.prose strong { color: var(--ink); }
.stack { display: grid; grid-template-columns: 160px 1fr; gap: 8px 18px; font-size: 15px; max-width: 760px; }
.stack dt { font: 600 12px/1.9 var(--mono); color: var(--ink3); text-transform: uppercase; letter-spacing: .08em; }
.stack dd { margin: 0; color: var(--ink2); }

/* embedded simulators */
.wrap.wide { max-width: 1360px; }
.labframe { display: block; width: 100%; height: 1100px; border: 0; margin: 8px 0 0; background: transparent; }

footer { margin-top: 70px; border-top: 1px solid var(--line); padding: 26px 0 40px; color: var(--ink3); font: 13px/1.6 var(--mono); }
footer .wrap { display: flex; gap: 16px; flex-wrap: wrap; justify-content: space-between; }

@media (max-width: 760px) {
  .about, .card.feature { grid-template-columns: 1fr; }
  .stack { grid-template-columns: 1fr; gap: 2px; }
  .stack dd { margin-bottom: 10px; }
  .top .wrap { gap: 10px; }
  .top nav { gap: 0; }
  .top nav a { padding: 8px 6px; font-size: 12px; }
  .ladder { padding-left: 24px; }
  .ladder::before { left: 4px; }
}