/* Layout: one 1080px column; hero splits copy + roll-bite diagram; content pages are a left label rail + body grid */
:root {
  --bg: #EDF0F1;        /* bright-annealed aluminium */
  --surface: #F8FAFA;
  --ink: #13202A;
  --muted: #55646E;
  --line: #C9D2D6;
  --accent: #1A4F84;    /* logo navy */
  --accent-ink: #FFFFFF;
  --heat: #C24F1B;      /* hot strip, diagram only */
  --roll: #DCE2E5;
  --f-display: "Archivo", "Arial Narrow", Arial, sans-serif;
  --f-body: "IBM Plex Sans", "Segoe UI", Helvetica, Arial, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, Menlo, Consolas, monospace;
  --s-1: 0.8125rem; --s0: 1rem; --s1: 1.1875rem; --s2: 1.5rem; --s3: 2.125rem; --s4: clamp(2.25rem, 5vw, 3.5rem);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0F161B; --surface: #16212A; --ink: #E5EBEE; --muted: #93A3AC; --line: #2A3842;
    --accent: #5BB8F0; --accent-ink: #0F161B; --heat: #EF7A43; --roll: #1E2B33; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0F161B; --surface: #16212A; --ink: #E5EBEE; --muted: #93A3AC; --line: #2A3842;
  --accent: #5BB8F0; --accent-ink: #0F161B; --heat: #EF7A43; --roll: #1E2B33; color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: var(--f-body); font-size: var(--s0); line-height: 1.6;
}
img { max-width: 100%; }
a { color: var(--accent); text-underline-offset: 3px; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

.wrap {
  max-width: 1080px; margin: 0 auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}

/* Header */
.site-head { border-bottom: 1px solid var(--line); }
.site-head .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 32px; padding-block: 18px; }
.mark { display: block; line-height: 0; }
.mark img { height: 56px; width: auto; display: block; }
.nav { display: flex; flex-wrap: wrap; gap: 4px 22px; }
.nav a { color: var(--muted); text-decoration: none; font-size: 0.9375rem; padding-block: 4px; border-bottom: 2px solid transparent; }
.nav a:hover { color: var(--ink); }
.nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--accent); }

/* Type */
h1, h2, h3 { font-family: var(--f-display); text-wrap: balance; margin: 0; line-height: 1.12; }
h1 { font-size: var(--s4); font-weight: 800; font-stretch: 112%; letter-spacing: -0.02em; }
h2 { font-size: var(--s3); font-weight: 700; font-stretch: 110%; letter-spacing: -0.01em; }
h3 { font-size: var(--s1); font-weight: 700; font-stretch: 105%; }
p { margin: 0; max-width: 65ch; }
.label { font-family: var(--f-mono); font-size: 0.75rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }
.lede { font-size: var(--s1); color: var(--muted); }
.stack { display: grid; gap: 16px; align-content: start; min-width: 0; }

/* Hero */
.hero .wrap { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 48px; align-items: center; padding-block: 64px 56px; }
.hero .stack { gap: 22px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 6px; }
.btn { display: inline-block; padding: 11px 20px; font-weight: 600; text-decoration: none; border: 1.5px solid var(--accent); border-radius: 3px; font-size: 0.9375rem; }
.btn.primary { background: var(--accent); color: var(--accent-ink); }
.btn.ghost { color: var(--accent); }
.bite { width: 100%; height: auto; display: block; }
.bite text { font-family: var(--f-mono); font-size: 11px; fill: var(--muted); }
.bite .strip { fill: var(--heat); opacity: 0.85; }
.bite .roll { fill: var(--roll); stroke: var(--ink); stroke-width: 1.2; }
.bite .hill { fill: var(--accent); fill-opacity: 0.22; stroke: var(--accent); stroke-width: 1.6; }
.bite .dim { stroke: var(--ink); stroke-width: 1; fill: none; }
.bite .neutral { stroke: var(--ink); stroke-width: 1; stroke-dasharray: 3 4; }
.bite .tag { fill: var(--ink); }
figcaption { font-size: var(--s-1); color: var(--muted); margin-top: 10px; max-width: 52ch; }

/* Facts strip */
.facts { border-block: 1px solid var(--line); }
.facts .wrap { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.fact { padding: 22px 20px 22px 0; display: grid; gap: 2px; }
.fact + .fact { padding-left: 20px; border-left: 1px solid var(--line); }
.fact b { font-family: var(--f-display); font-stretch: 112%; font-size: var(--s2); font-weight: 700; font-variant-numeric: tabular-nums; }
.fact span { font-size: var(--s-1); color: var(--muted); }

/* Sections with a label rail */
.section .wrap { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 32px; padding-block: 64px; }
.section + .section .wrap { border-top: 1px solid var(--line); }
.rail { padding-top: 8px; }

.grid3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px 32px; }
.grid2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 40px; }
.item { display: grid; gap: 8px; align-content: start; padding-top: 14px; border-top: 2px solid var(--ink); min-width: 0; }
.item p { color: var(--muted); }
.item ul { margin: 4px 0 0; padding-left: 1.1em; color: var(--muted); }
.item li + li { margin-top: 3px; }

.page-head .wrap { padding-block: 56px 8px; display: grid; gap: 16px; }

/* Course and tool cards: the one place a box is used */
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 4px; padding: 24px; display: grid; gap: 10px; align-content: start; min-width: 0; }
.card .meta { font-family: var(--f-mono); font-size: 0.75rem; color: var(--muted); letter-spacing: 0.04em; }
.card p { color: var(--muted); }
.card .go { font-weight: 600; text-decoration: none; margin-top: 4px; }
.card .go::after { content: " \2192"; }

/* Timeline */
.timeline { list-style: none; margin: 0; padding: 0; display: grid; }
.timeline li { display: grid; grid-template-columns: 130px minmax(0, 1fr); gap: 20px; padding-block: 18px; border-top: 1px solid var(--line); }
.timeline .when { font-family: var(--f-mono); font-size: 0.8125rem; color: var(--muted); font-variant-numeric: tabular-nums; padding-top: 3px; }
.timeline h3 { margin-bottom: 4px; }
.timeline p { color: var(--muted); }

/* Contact band */
.contact { background: var(--ink); color: var(--bg); }
.contact .wrap { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 32px; padding-block: 56px; align-items: end; }
.contact h2 { color: var(--bg); }
.contact p { color: var(--bg); opacity: 0.8; }
.contact dl { margin: 0; display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 10px 18px; }
.contact dt { font-family: var(--f-mono); font-size: 0.75rem; letter-spacing: 0.12em; text-transform: uppercase; opacity: 0.7; padding-top: 3px; }
.contact dd { margin: 0; overflow-wrap: anywhere; }
.contact a { color: var(--bg); }

.site-foot .wrap { padding-block: 22px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; font-size: var(--s-1); color: var(--muted); }

@media (max-width: 860px) {
  .hero .wrap { grid-template-columns: minmax(0, 1fr); gap: 32px; padding-block: 44px; }
  .section .wrap { grid-template-columns: minmax(0, 1fr); gap: 20px; padding-block: 48px; }
  .grid3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .contact .wrap { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 560px) {
  .grid3, .grid2 { grid-template-columns: minmax(0, 1fr); }
  .timeline li { grid-template-columns: minmax(0, 1fr); gap: 4px; }
  .facts .wrap { grid-template-columns: minmax(0, 1fr); }
  .fact + .fact { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); }
}
@media (prefers-reduced-motion: no-preference) {
  .bite .hill { animation: rise 900ms ease-out both; transform-origin: 50% 100%; transform-box: fill-box; }
  @keyframes rise { from { transform: scaleY(0.25); } to { transform: scaleY(1); } }
}

/* Logo is dark blue on transparent: give it a light plate on dark themes */
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .mark { background: #EDF0F1; padding: 6px 10px; } }
:root[data-theme="dark"] .mark { background: #EDF0F1; padding: 6px 10px; }
@media (max-width: 560px) { .mark img { height: 46px; } }

/* Hero screenshot of the shift profile tab */
.shot { margin: 0; min-width: 0; }
.shot img { display: block; width: 100%; height: auto; border: 1px solid var(--line); border-radius: 4px; background: #FFFFFF; }