/* Layout concept: a dark "lab at night" — content floats over a vacuum-black ground,
   lit by the laser colors of a Ba+ experiment. Each page sets its own --accent. */
:root {
  --bg: #06090d;          /* vacuum */
  --bg-2: #0b1117;        /* raised surface */
  --bg-3: #111a22;        /* inset / control */
  --line: #1d2a35;
  --line-2: #2a3a47;
  --fg: #dde7ec;
  --fg-dim: #93a4af;
  --fg-faint: #5d6f7b;
  --ion: #4ff2d2;         /* ~493 nm Ba+ fluorescence */
  --repump: #ff5340;      /* ~650 nm */
  --tube: #ffad55;        /* tube heater glow */
  --ok: #4ade80;
  --warn: #fbbf24;
  --bad: #f87171;
  --accent: var(--ion);

  --f-display: "Fraunces", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --f-body: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  --step--1: 0.85rem;
  --step-0: 1rem;
  --step-1: 1.25rem;
  --step-2: 1.6rem;
  --step-3: 2.2rem;
  --step-4: clamp(2.6rem, 6vw, 4.4rem);

  --radius: 6px;
  --wrap: 1120px;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--f-body);
  font-size: var(--step-0);
  line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
[hidden] { display: none !important; }

h1, h2, h3 { font-family: var(--f-display); font-weight: 500; line-height: 1.15; text-wrap: balance; margin: 0; letter-spacing: -0.01em; }
h1 { font-size: var(--step-4); font-weight: 400; }
h2 { font-size: var(--step-3); }
h3 { font-size: var(--step-1); font-family: var(--f-body); font-weight: 600; letter-spacing: 0; }
p { margin: 0; }
.prose { max-width: 66ch; display: grid; gap: 1em; }
.prose ul, .prose ol { margin: 0; padding-left: 1.2em; display: grid; gap: 0.35em; }
code, kbd, .mono { font-family: var(--f-mono); font-size: 0.92em; }
pre {
  margin: 0; background: var(--bg-3); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 0.9rem 1rem; overflow-x: auto;
  font-family: var(--f-mono); font-size: 0.85rem; line-height: 1.55; color: var(--fg);
}
.label {
  font-family: var(--f-mono); font-size: 0.72rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--fg-dim);
}
.dim { color: var(--fg-dim); }
.faint { color: var(--fg-faint); }

/* ---------- wrapper & header ---------- */
.wrap { max-width: var(--wrap); margin: 0 auto; padding-inline: max(16px, 4vw); }

.site-header {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; gap: 1.5rem; min-height: 60px; }
.brand {
  display: flex; align-items: center; gap: 0.6rem; color: var(--fg); text-decoration: none;
  font-family: var(--f-display); font-size: 1.15rem; white-space: nowrap;
}
.brand .dot {
  width: 9px; height: 9px; border-radius: 50%; background: var(--ion);
  box-shadow: 0 0 10px 2px color-mix(in srgb, var(--ion) 60%, transparent);
}
.nav { display: flex; gap: 0.15rem; margin-left: auto; flex-wrap: wrap; }
.nav a {
  color: var(--fg-dim); text-decoration: none; font-size: 0.9rem;
  padding: 0.35rem 0.6rem; border-radius: 4px;
}
.nav a:hover { color: var(--fg); background: var(--bg-3); }
.nav a[aria-current="page"] { color: var(--fg); box-shadow: inset 0 -2px 0 var(--accent); border-radius: 0; }
.menu-btn {
  display: none; margin-left: auto; background: none; border: 1px solid var(--line-2); color: var(--fg);
  font: inherit; font-size: 0.85rem; padding: 0.35rem 0.7rem; border-radius: 4px; cursor: pointer;
}
@media (max-width: 900px) {
  .menu-btn { display: block; }
  .nav { display: none; position: absolute; left: 0; right: 0; top: 100%; background: var(--bg-2);
         border-bottom: 1px solid var(--line); flex-direction: column; padding: 0.5rem max(16px, 4vw) 1rem; }
  .nav.open { display: flex; }
  .nav a { padding: 0.6rem 0.4rem; }
  .nav a[aria-current="page"] { box-shadow: inset 2px 0 0 var(--accent); padding-left: 0.8rem; }
}

/* ---------- page sections ---------- */
main { display: block; }
.page-head { padding-block: clamp(3rem, 8vw, 5.5rem) 2rem; display: grid; gap: 1rem; }
.page-head .lede { font-size: var(--step-1); color: var(--fg-dim); max-width: 60ch; line-height: 1.5; }
.section { padding-block: 2.5rem; display: grid; gap: 1.5rem; }
.section + .section { border-top: 1px solid var(--line); }
.section-head { display: grid; gap: 0.5rem; }
.two-col { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 2.5rem; align-items: start; }
@media (max-width: 820px) { .two-col { grid-template-columns: minmax(0, 1fr); } }

.panel { background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.25rem; }
.grid-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr)); gap: 1rem; }
.card {
  background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.25rem; display: flex; flex-direction: column; gap: 0.7rem; min-width: 0;
}
.card h3 { font-size: 1.1rem; }
.card .tags { display: flex; flex-wrap: wrap; gap: 0.35rem; margin-top: auto; padding-top: 0.4rem; }
.tag {
  font-family: var(--f-mono); font-size: 0.7rem; color: var(--fg-dim);
  border: 1px solid var(--line-2); border-radius: 3px; padding: 0.1rem 0.4rem;
}
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem; cursor: pointer;
  font: inherit; font-size: 0.9rem; color: var(--bg); background: var(--accent);
  border: 1px solid var(--accent); border-radius: 4px; padding: 0.5rem 0.9rem; text-decoration: none;
}
.btn.ghost { background: transparent; color: var(--fg); border-color: var(--line-2); }
.btn.ghost:hover { border-color: var(--accent); }
.btn:hover { text-decoration: none; filter: brightness(1.08); }

.placeholder {
  border: 1px dashed var(--line-2); border-radius: var(--radius); color: var(--fg-faint);
  font-family: var(--f-mono); font-size: 0.75rem; display: grid; place-items: center; text-align: center;
  padding: 1rem; background: repeating-linear-gradient(135deg, transparent 0 10px, color-mix(in srgb, var(--line) 40%, transparent) 10px 11px);
}
.todo { color: var(--warn); font-family: var(--f-mono); font-size: 0.85em; }

/* controls */
.controls { display: flex; flex-wrap: wrap; gap: 1rem 1.5rem; align-items: center; }
.control { display: grid; gap: 0.25rem; min-width: 0; }
.control label { font-family: var(--f-mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg-dim); }
.control output { font-family: var(--f-mono); color: var(--fg); font-variant-numeric: tabular-nums; }
input[type="range"] { accent-color: var(--accent); width: 180px; max-width: 100%; }
.seg { display: inline-flex; border: 1px solid var(--line-2); border-radius: 4px; overflow: hidden; }
.seg button { font: inherit; font-size: 0.85rem; background: none; color: var(--fg-dim); border: 0; padding: 0.35rem 0.75rem; cursor: pointer; }
.seg button[aria-pressed="true"] { background: var(--accent); color: var(--bg); }
canvas { display: block; width: 100%; max-width: 100%; }

/* footer */
.site-footer { border-top: 1px solid var(--line); margin-top: 4rem; }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 0.5rem 2rem; justify-content: space-between; padding-block: 1.5rem; color: var(--fg-faint); font-size: 0.85rem; }

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

/* ======================================================================
   Markdown content: anything written in content/*.md lands inside .md
   ====================================================================== */
.md { min-width: 0; }
.md > p, .md > ul, .md > ol, .md > blockquote, .md > h3, .md > h4, .md > dl { max-width: 68ch; margin: 0; }
.md > ul, .md > ol { padding-left: 1.2em; display: grid; gap: 0.35em; }
.md > h2 { margin-bottom: 0.25rem; }
.md > h3 { margin-top: 0.75rem; }
.md blockquote { border-left: 2px solid var(--warn); padding: 0.3rem 0 0.3rem 0.9rem; color: var(--fg-dim); }
.md blockquote p { margin: 0; }
.md img { border-radius: var(--radius); }
.md hr { border: 0; border-top: 1px solid var(--line); width: 100%; margin: 0; }
.md li > p { margin: 0; }
.small { font-size: 0.85rem; }
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 0.92rem; }
th, td { text-align: left; padding: 0.55rem 0.75rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-family: var(--f-mono); font-weight: 500; font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg-dim); }
.code { position: relative; }
.code button { position: absolute; top: 0.4rem; right: 0.4rem; font: inherit; font-size: 0.72rem; font-family: var(--f-mono); background: var(--bg-2); color: var(--fg-dim); border: 1px solid var(--line-2); border-radius: 3px; padding: 0.15rem 0.45rem; cursor: pointer; }
.code button:hover { color: var(--fg); }
.btn-row { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 0.5rem; }

/* ---------- home ---------- */
.hero { padding-block: clamp(2.5rem, 7vw, 5rem) 0; display: grid; gap: 1.25rem; }
.hero h1 { max-width: 16ch; }
.hero h1 em { font-style: italic; color: var(--ion); font-weight: 300; }
.hero .lede { font-size: var(--step-1); color: var(--fg-dim); max-width: 52ch; line-height: 1.5; }
.chain-stage { position: relative; margin-top: 1rem; }
#hero-chain { height: clamp(220px, 34vw, 360px); cursor: crosshair; touch-action: pan-y; }
.chain-caption { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.5rem 1.5rem; border-top: 1px solid var(--line); padding-top: 0.6rem; font-family: var(--f-mono); font-size: 0.75rem; color: var(--fg-faint); }
.chain-caption b { color: var(--fg-dim); font-weight: 500; }
.toc { display: grid; grid-template-columns: minmax(0, 1fr); border-top: 1px solid var(--line); }
@media (min-width: 760px) { .toc { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.toc a { display: grid; grid-template-columns: 7.5rem minmax(0, 1fr); gap: 0.2rem 1rem; align-items: baseline; padding: 1.1rem 0.25rem; border-bottom: 1px solid var(--line); text-decoration: none; color: var(--fg); }
.toc a:hover .toc-title { color: var(--ion); }
.toc-title { font-family: var(--f-display); font-size: 1.3rem; transition: color .15s; }
.toc-desc { color: var(--fg-dim); font-size: 0.92rem; grid-column: 2; }
@media (min-width: 760px) { .toc a:nth-child(odd) { padding-right: 2rem; } .toc a:nth-child(even) { padding-left: 2rem; border-left: 1px solid var(--line); } }
.page-head h1 em { font-style: italic; font-weight: 300; color: var(--accent); }

/* ---------- fact tiles (any page with `facts:`) ---------- */
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.facts div { background: var(--bg-2); padding: 1rem 1.1rem; display: grid; gap: 0.2rem; }
.facts .v { font-family: var(--f-display); font-size: 1.7rem; font-variant-numeric: tabular-nums; }

/* ---------- research widgets ---------- */
.levels { margin: 0; display: grid; gap: 0.4rem; }
.levels svg { width: 100%; height: auto; max-width: 520px; }
.levels text { font-family: var(--f-mono); font-size: 12px; fill: var(--fg-dim); }
.levels .lvl { stroke: var(--fg); stroke-width: 2; }
.levels figcaption { color: var(--fg-faint); font-size: 0.8rem; }
.toy { display: grid; gap: 1rem; }
.toy-body { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 1rem; }
.toy-main { display: grid; gap: 0.75rem; min-width: 0; }
.toy-side { display: grid; gap: 0.5rem; align-content: start; }
@media (max-width: 820px) { .toy-body { grid-template-columns: minmax(0, 1fr); } }
#modes-canvas { height: 220px; background: radial-gradient(ellipse at center, #0c151c, var(--bg) 70%); border: 1px solid var(--line); border-radius: var(--radius); }
#mode-bars { height: 120px; }
#mode-list { display: grid; gap: 2px; max-height: 360px; overflow-y: auto; align-content: start; }
#mode-list button { display: flex; justify-content: space-between; gap: 1rem; font: inherit; font-size: 0.85rem; text-align: left; background: var(--bg-3); color: var(--fg-dim); border: 1px solid transparent; border-radius: 3px; padding: 0.4rem 0.6rem; cursor: pointer; }
#mode-list button[aria-pressed="true"] { border-color: var(--accent); color: var(--fg); }
#mode-info { min-height: 3em; color: var(--fg-dim); font-size: 0.92rem; }
#mode-info b { color: var(--fg); }

/* ---------- projects ---------- */
.proj { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 2rem; padding-block: 2.25rem; border-top: 1px solid var(--line); }
.page-head + .proj { border-top: 0; }
@media (max-width: 820px) { .proj { grid-template-columns: minmax(0, 1fr); gap: 1.25rem; } }
.proj .media { aspect-ratio: 4 / 3; max-width: 100%; }
.proj .media img { width: 100%; height: 100%; object-fit: cover; border-radius: var(--radius); }
.proj-body { display: grid; gap: 0.9rem; align-content: start; min-width: 0; }
.proj-meta { display: flex; flex-wrap: wrap; gap: 0.5rem 1rem; align-items: center; }
.pill { font-family: var(--f-mono); font-size: 0.7rem; letter-spacing: 0.08em; text-transform: uppercase; padding: 0.15rem 0.5rem; border-radius: 99px; border: 1px solid currentColor; }
.pill.live { color: var(--ok); } .pill.wip { color: var(--warn); } .pill.done { color: var(--fg-dim); }
.spec { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 0.3rem 1.25rem; font-size: 0.9rem; margin: 0; }
.spec dt { font-family: var(--f-mono); font-size: 0.75rem; color: var(--fg-faint); padding-top: 0.15rem; }
.spec dd { margin: 0; }
details { border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-2); }
summary { cursor: pointer; padding: 0.6rem 0.9rem; font-size: 0.9rem; color: var(--fg-dim); }
details[open] summary { border-bottom: 1px solid var(--line); }
details .prose { padding: 0.9rem; font-size: 0.93rem; }

/* ---------- hi-fi ---------- */
.chains { display: grid; gap: 1rem; }
.chain { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.chain > div { padding: 1.1rem 1.2rem; background: var(--bg-2); display: grid; gap: 0.35rem; align-content: start; position: relative; min-width: 0; }
.chain > div + div { border-left: 1px solid var(--line); }
.chain > div + div::before { content: "→"; position: absolute; left: -0.6rem; top: 1.1rem; background: var(--bg); color: var(--accent); font-family: var(--f-mono); width: 1.2rem; text-align: center; }
.chain h3 { font-family: var(--f-display); font-weight: 500; font-size: 1.25rem; }
.chain .why { grid-column: 1 / -1; border-left: 0; border-top: 1px solid var(--line); background: var(--bg); color: var(--fg-dim); font-size: 0.92rem; display: block; }
.chain .why b { color: var(--fg); }
.chain .why::before { display: none; }
@media (max-width: 720px) {
  .chain { grid-template-columns: minmax(0, 1fr); }
  .chain > div + div { border-left: 0; border-top: 1px solid var(--line); }
  .chain > div + div::before { content: "↓"; left: 1.2rem; top: -0.75rem; }
}
.gear { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 220px), 1fr)); gap: 1rem; }
.gear .media { aspect-ratio: 4/3; max-width: 100%; width: 100%; object-fit: cover; border-radius: var(--radius); }
.kv { display: grid; grid-template-columns: max-content minmax(0,1fr); gap: 0.2rem 1rem; font-size: 0.88rem; margin: 0; }
.kv dt { color: var(--fg-faint); font-family: var(--f-mono); font-size: 0.75rem; padding-top: 0.1rem; }
.kv dd { margin: 0; }
.calc { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 1.5rem; }
@media (max-width: 820px) { .calc { grid-template-columns: minmax(0, 1fr); } }
.calc-inputs { align-content: start; }
.calc-out { display: grid; gap: 0.75rem; align-content: start; }
.calc input[type="number"], .calc select { font: inherit; font-family: var(--f-mono); background: var(--bg-3); color: var(--fg); border: 1px solid var(--line-2); border-radius: 4px; padding: 0.35rem 0.5rem; width: 9rem; max-width: 100%; }
.readout { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.readout div { background: var(--bg-2); padding: 1rem; display: grid; gap: 0.2rem; }
.readout .v { font-family: var(--f-display); font-size: 1.8rem; font-variant-numeric: tabular-nums; color: var(--accent); }
@media (max-width: 480px) { .readout { grid-template-columns: minmax(0, 1fr); } }

/* ---------- guides ---------- */
.guides-layout { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 3rem; align-items: start; }
@media (max-width: 860px) { .guides-layout { grid-template-columns: minmax(0, 1fr); gap: 1.5rem; } }
.side { position: sticky; top: calc(env(safe-area-inset-top, 0px) + 80px); display: grid; gap: 0.4rem; }
@media (max-width: 860px) { .side { position: static; } }
.side .label { margin-bottom: 0.4rem; }
.side a { color: var(--fg-dim); text-decoration: none; font-size: 0.92rem; padding: 0.25rem 0 0.25rem 0.75rem; border-left: 1px solid var(--line-2); }
.side a:hover { color: var(--fg); border-left-color: var(--accent); }
.guide { display: grid; gap: 1rem; padding-block: 2rem; border-top: 1px solid var(--line); scroll-margin-top: 80px; }
.guide:first-child { border-top: 0; padding-top: 0; }
.guide > h2 { font-size: var(--step-2); }
.guide > h3 { font-size: 1rem; }
.meta { display: flex; flex-wrap: wrap; gap: 0.4rem; }

/* ---------- playground ---------- */
.demo { display: grid; gap: 1rem; }
.stage { background: radial-gradient(ellipse at center, #0c151c, var(--bg) 75%); border: 1px solid var(--line); border-radius: var(--radius); }
#cool-canvas { height: 200px; touch-action: none; user-select: none; }
#crystal-canvas { height: 280px; cursor: copy; }
#rabi-sphere, #rabi-plot { height: 240px; }
.rabi-grid { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 3fr); gap: 1rem; }
@media (max-width: 760px) { .rabi-grid { grid-template-columns: minmax(0, 1fr); } }
.hud { display: flex; flex-wrap: wrap; gap: 0.5rem 2rem; align-items: center; font-family: var(--f-mono); font-size: 0.85rem; color: var(--fg-dim); }
.hud b { color: var(--fg); font-weight: 500; font-variant-numeric: tabular-nums; }
#cool-fire { user-select: none; touch-action: none; }
#cool-fire[aria-pressed="true"] { box-shadow: 0 0 0 3px color-mix(in srgb, var(--ion) 35%, transparent); }
.check { display: inline-flex; gap: 0.45rem; align-items: center; font-size: 0.9rem; color: var(--fg-dim); cursor: pointer; }
.check input { accent-color: var(--accent); }
#cool-msg { color: var(--fg); min-height: 1.6em; margin: 0; }

/* ---------- gallery ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.filters button { font: inherit; font-size: 0.85rem; background: none; color: var(--fg-dim); border: 1px solid var(--line-2); border-radius: 99px; padding: 0.3rem 0.85rem; cursor: pointer; }
.filters button[aria-pressed="true"] { color: var(--bg); background: var(--accent); border-color: var(--accent); }
.masonry { columns: 3 260px; column-gap: 1rem; margin-top: 1.5rem; }
.shot { break-inside: avoid; margin: 0 0 1rem; display: grid; gap: 0.4rem; }
.shot button { all: unset; cursor: zoom-in; display: block; border-radius: var(--radius); overflow: hidden; }
.shot button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.shot img { width: 100%; height: auto; transition: transform .3s; }
.shot button:hover img { transform: scale(1.02); }
.shot .placeholder { width: 100%; }
.shot figcaption { font-size: 0.85rem; color: var(--fg-dim); }
.lightbox { position: fixed; inset: 0; z-index: 50; background: rgba(3,5,8,.94); display: grid; place-items: center; padding: max(16px, 4vw); }
.lightbox figure { margin: 0; display: grid; gap: 0.6rem; max-width: 1100px; }
.lightbox img { max-height: 80vh; width: auto; margin: 0 auto; border-radius: var(--radius); }
.lightbox .ph { width: min(80vw, 800px); max-width: 100%; }
.lightbox figcaption { color: var(--fg-dim); text-align: center; }
.lightbox .close { position: absolute; top: calc(env(safe-area-inset-top, 0px) + 1rem); right: 1rem; }

/* ---------- about ---------- */
.intro { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 2.5rem; align-items: start; }
@media (max-width: 720px) { .intro { grid-template-columns: minmax(0, 1fr); } .intro .portrait { max-width: 220px; } }
.portrait { aspect-ratio: 4 / 5; max-width: 100%; width: 100%; object-fit: cover; border-radius: var(--radius); }
.intro .md > p:first-child { font-size: var(--step-1); line-height: 1.5; color: var(--fg); }
.intro .md > p { color: var(--fg-dim); }
.timeline { display: grid; margin: 0; padding: 0; list-style: none; }
.timeline li { display: grid; grid-template-columns: 9rem minmax(0, 1fr); gap: 1.5rem; padding-block: 1rem; border-top: 1px solid var(--line); }
@media (max-width: 560px) { .timeline li { grid-template-columns: minmax(0, 1fr); gap: 0.25rem; } }
.timeline .when { font-family: var(--f-mono); font-size: 0.8rem; color: var(--fg-faint); padding-top: 0.2rem; font-variant-numeric: tabular-nums; }
.timeline h3 { font-size: 1.02rem; }
.skills { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 230px), 1fr)); gap: 1.5rem; }
.skills ul { margin: 0.5rem 0 0; padding: 0; list-style: none; display: grid; gap: 0.3rem; color: var(--fg-dim); font-size: 0.93rem; }

/* ---------- contact ---------- */
.page-contact .md > ul { list-style: none; padding: 0; gap: 0; max-width: 40rem; }
.page-contact .md > ul li { display: flex; justify-content: space-between; gap: 1rem; padding: 0.8rem 0; border-top: 1px solid var(--line); flex-wrap: wrap; }
.page-contact .md > ul li strong { font-family: var(--f-mono); font-weight: 400; font-size: 0.75rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--fg-dim); }
.guides-layout > div, .guide, .code { min-width: 0; }
.code { max-width: 100%; }