@font-face { font-family: 'IBM Plex Sans'; font-weight: 400; font-display: swap; src: url('/fonts/ibm-plex-sans-latin-400-normal.woff2') format('woff2'); }
@font-face { font-family: 'IBM Plex Sans'; font-weight: 500; font-display: swap; src: url('/fonts/ibm-plex-sans-latin-500-normal.woff2') format('woff2'); }
@font-face { font-family: 'IBM Plex Mono'; font-weight: 400; font-display: swap; src: url('/fonts/ibm-plex-mono-latin-400-normal.woff2') format('woff2'); }

:root {
  --bg: #141517;        /* charcoal */
  --surface: #1b1d20;   /* graphite */
  --line: #2e3237;      /* concrete seam */
  --text: #e6e4df;      /* off-white */
  --muted: #a3a8ae;     /* steel */
  --dim: #868c93;
  --accent: #c2ab80;    /* muted amber, used as signal only */
  --petrol: #8fb3b5;    /* desaturated petrol, links */
  --sans: 'IBM Plex Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;
  --max: 68rem;
  --prose: 42rem;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 400 1.0625rem/1.65 var(--sans); }
a { color: var(--petrol); text-underline-offset: 0.2em; text-decoration-thickness: 1px; }
a:hover { color: var(--text); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
h1, h2, h3 { font-weight: 500; line-height: 1.2; letter-spacing: -0.01em; margin: 0 0 1rem; }
h1 { font-size: clamp(2.1rem, 5.5vw, 3.6rem); letter-spacing: -0.025em; }
h2 { font-size: clamp(1.4rem, 3vw, 1.85rem); }
h3 { font-size: 1.1rem; }
p, ul, ol, table { margin: 0 0 1.1rem; }
ul, ol { padding-left: 1.25rem; }
li { margin-bottom: 0.4rem; }
code { font: 0.9em var(--mono); color: var(--text); background: var(--surface); padding: 0.1em 0.35em; border: 1px solid var(--line); overflow-wrap: anywhere; }
strong { font-weight: 500; }

.skip { position: absolute; left: -999px; top: 0; background: var(--accent); color: var(--bg); padding: 0.5rem 1rem; }
.skip:focus { left: 1rem; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }

/* header */
.site-header { border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; flex-wrap: wrap; gap: 0.75rem 2rem; align-items: center; justify-content: space-between; padding-top: 1.1rem; padding-bottom: 1.1rem; }
.brand { display: flex; align-items: center; gap: 0.7rem; color: var(--text); text-decoration: none; font-weight: 500; }
.brand img { width: 28px; height: 28px; }
.brand small { display: block; font: 400 0.72rem/1.2 var(--mono); color: var(--dim); letter-spacing: 0.06em; text-transform: uppercase; }
.site-header nav ul { list-style: none; display: flex; flex-wrap: wrap; gap: 0.25rem 1.4rem; margin: 0; padding: 0; }
.site-header nav li { margin: 0; }
.site-header nav a { color: var(--muted); text-decoration: none; font-size: 0.92rem; }
.site-header nav a:hover, .site-header nav a[aria-current="page"] { color: var(--text); }

/* labels */
.eyebrow { font: 400 0.78rem/1.4 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--dim); margin-bottom: 1.1rem; }
.status { display: inline-flex; align-items: center; gap: 0.6rem; font: 400 0.8rem/1.4 var(--mono); color: var(--muted); border: 1px solid var(--line); padding: 0.45rem 0.75rem; }
.status::before { content: ''; width: 7px; height: 7px; background: var(--accent); }

/* hero */
.hero { padding: clamp(4rem, 12vw, 8.5rem) 0 clamp(3rem, 8vw, 6rem); border-bottom: 1px solid var(--line); }
.hero h1 { max-width: 15em; }
.hero .lede { font-size: clamp(1.1rem, 2.2vw, 1.3rem); color: var(--muted); max-width: 36em; margin-bottom: 2rem; }

/* numbered sections: index column + content column */
.section { border-bottom: 1px solid var(--line); padding: clamp(3rem, 7vw, 5rem) 0; }
.section .wrap { display: grid; grid-template-columns: 1fr; gap: 0.5rem 3rem; }
@media (min-width: 52rem) { .section .wrap { grid-template-columns: 11rem minmax(0, 1fr); } }
.idx { font: 400 0.8rem/1.6 var(--mono); color: var(--dim); letter-spacing: 0.08em; padding-top: 0.45rem; }
.body { max-width: var(--prose); }
.body > p:last-child, .body > ul:last-child { margin-bottom: 0; }

/* capability status table */
.table-scroll { overflow-x: auto; margin-bottom: 1.1rem; }
table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
caption { text-align: left; color: var(--dim); font: 400 0.78rem/1.5 var(--mono); padding-bottom: 0.75rem; }
th, td { text-align: left; vertical-align: top; padding: 0.8rem 1rem 0.8rem 0; border-top: 1px solid var(--line); }
thead th { font: 400 0.75rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: 0.08em; color: var(--dim); }
td.state { font: 400 0.8rem/1.5 var(--mono); white-space: nowrap; color: var(--muted); }
td.state.now { color: var(--accent); }

.grid-2 { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); margin: 1.5rem 0 0; }
@media (min-width: 40rem) { .grid-2 { grid-template-columns: 1fr 1fr; } }
.grid-2 > div { background: var(--bg); padding: 1.25rem 1.25rem 0.4rem; }
.grid-2 h3 { font-size: 1rem; }
.grid-2 p { color: var(--muted); font-size: 0.95rem; }

.link-list { list-style: none; padding: 0; border-top: 1px solid var(--line); }
.link-list li { margin: 0; border-bottom: 1px solid var(--line); }
.link-list a { display: flex; justify-content: space-between; gap: 1rem; padding: 0.9rem 0; color: var(--text); text-decoration: none; }
.link-list a span { color: var(--dim); font: 400 0.8rem/1.9 var(--mono); }
.link-list a:hover { color: var(--accent); }

/* legal documents */
.doc { padding: clamp(3rem, 8vw, 5.5rem) 0; }
.doc .wrap { max-width: calc(var(--prose) + 2.5rem); }
.doc h1 { font-size: clamp(2rem, 4.5vw, 2.8rem); }
.doc h2 { font-size: 1.3rem; margin-top: 2.75rem; padding-top: 1.5rem; border-top: 1px solid var(--line); }
.doc h3 { margin-top: 1.75rem; }
.doc .meta { color: var(--dim); font: 400 0.85rem/1.6 var(--mono); }
.doc address { font-style: normal; margin-bottom: 1.1rem; }
.note { border-left: 2px solid var(--accent); background: var(--surface); padding: 1rem 1.25rem; color: var(--muted); font-size: 0.95rem; margin: 1.5rem 0; }
.note p:last-child { margin: 0; }
.toc { border: 1px solid var(--line); padding: 1rem 1.25rem 0.5rem; font-size: 0.95rem; margin: 2rem 0; }
.toc ol { margin: 0 0 0.5rem; }

/* footer */
.site-footer { padding: 2.5rem 0 3rem; color: var(--dim); font-size: 0.88rem; }
.site-footer .wrap { display: grid; gap: 1.25rem; }
.site-footer ul { list-style: none; display: flex; flex-wrap: wrap; gap: 0.25rem 1.5rem; padding: 0; margin: 0; }
.site-footer li { margin: 0; }
.site-footer a { color: var(--muted); }
.site-footer p { margin: 0; max-width: 52rem; }