/* Empyrean Capital — Direction C "Sovereign".
   The graphic system is the rule, the accent, and drawn figures. No photography,
   no gradients, no illustration-for-decoration: every figure carries meaning. */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--ec-surface);
  color: var(--ec-ink);
  font-family: var(--ec-font-ui);
  font-size: var(--ec-step-0);
  line-height: var(--ec-leading-body);
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--ec-accent); }
:focus-visible { outline: 2px solid var(--ec-accent); outline-offset: 3px; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.measure { max-width: 68ch; }

.skip { position: absolute; left: -9999px; top: 0; background: var(--ec-ink);
        color: var(--ec-surface); padding: 12px 18px; z-index: 100; }
.skip:focus { left: 0; }

/* ---- header ---- */
.site-head { position: sticky; top: 0; z-index: 50; background: var(--ec-surface);
             border-bottom: var(--ec-rule) solid var(--ec-hairline); }
.head-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 78px; }
.brand { display: block; color: var(--ec-ink); }
.brand .wm { display: block; width: 232px; height: auto; }
.site-head nav ul { display: flex; gap: 26px; list-style: none; margin: 0; padding: 0;
                    font-size: var(--ec-step--1); letter-spacing: var(--ec-tracking-label);
                    text-transform: uppercase; }
.site-head nav a { text-decoration: none; }
.site-head nav a[aria-current="page"] { color: var(--ec-accent); }
.nav-toggle { display: none; background: none; border: var(--ec-rule) solid var(--ec-hairline);
              color: inherit; font: inherit; font-size: var(--ec-step--1);
              letter-spacing: var(--ec-tracking-label); text-transform: uppercase;
              padding: 9px 16px; cursor: pointer; }

/* ---- type ---- */
h1, h2, h3 { font-family: var(--ec-font-display); font-weight: 400; line-height: var(--ec-leading-tight); }
h1 { font-size: var(--ec-step-4); margin: 0 0 22px; text-wrap: balance; }
h2 { font-size: var(--ec-step-3); margin: 0 0 28px; }
h3 { font-size: var(--ec-step-1); margin: 0 0 10px; }
p { margin: 0 0 18px; }
.eyebrow { font-size: var(--ec-step--1); letter-spacing: var(--ec-tracking-label);
           text-transform: uppercase; color: var(--ec-accent); margin: 0 0 20px; }
.lead { font-size: var(--ec-step-1); max-width: 58ch; }

/* ---- hero ---- */
.hero { padding: clamp(56px, 8vw, 104px) 0 clamp(40px, 5vw, 72px); }
.hero__inner { display: grid; gap: 40px; align-items: center; }
.hero--fig .hero__inner { grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); }
.hero__fig { color: var(--ec-ink); opacity: .92; }
.hero__fig .fig { width: 100%; height: auto; display: block; }

/* ---- bands ---- */
.band { padding: clamp(52px, 6vw, 88px) 0; border-top: var(--ec-rule) solid var(--ec-hairline); }
.band--alt { background: var(--ec-surface-raised); }
.band--dark { background: var(--ec-ink); color: var(--ec-surface); border-top: 0; }
/* A dark band inverts against the page, so its accent and hairline must invert
   with it. Inheriting the page accent put dark bordeaux on black at 1.77:1 in
   light mode — an eyebrow nobody could read. Light page -> band is black -> use
   the lift; dark page -> band is ivory -> use the base bordeaux. */
.band--dark { --ec-accent: #C25F70; --ec-hairline: rgba(247, 245, 240, 0.20); }
@media (prefers-color-scheme: dark) {
  .band--dark { --ec-accent: #6E1F2A; --ec-hairline: rgba(11, 11, 12, 0.16); }
}
:root[data-theme="light"] .band--dark { --ec-accent: #C25F70; --ec-hairline: rgba(247, 245, 240, 0.20); }
:root[data-theme="dark"]  .band--dark { --ec-accent: #6E1F2A; --ec-hairline: rgba(11, 11, 12, 0.16); }
.band--dark h2, .band--dark h3 { color: var(--ec-surface); }
.band--dark .eyebrow { color: var(--ec-accent); }
.band--dark p { color: color-mix(in srgb, var(--ec-surface) 76%, transparent); }
.band--dark .card { border-color: color-mix(in srgb, var(--ec-surface) 22%, transparent); }
.band--dark .figure { color: var(--ec-surface); }
.band--dark figcaption { color: color-mix(in srgb, var(--ec-surface) 60%, transparent);
                         border-top-color: color-mix(in srgb, var(--ec-surface) 20%, transparent); }
.band--dark .ticks li { color: color-mix(in srgb, var(--ec-surface) 76%, transparent); }

.btn { display: inline-block; margin-top: 8px; padding: 13px 30px;
       border: var(--ec-rule) solid var(--ec-ink); color: var(--ec-ink);
       text-decoration: none; font-size: var(--ec-step--1);
       letter-spacing: var(--ec-tracking-label); text-transform: uppercase; }
.btn:hover { background: var(--ec-ink); color: var(--ec-surface); }

/* ---- editorial split (breaks the eyebrow/h2/p rhythm) ---- */
.split { display: grid; grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr); gap: 40px 56px; }
.split--wide { grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); }
.split__lede h2 { margin: 0; }
.split__body p:last-child { margin-bottom: 0; }

.note { border-left: 2px solid var(--ec-accent); padding: 4px 0 4px 22px; }
.note p { color: var(--ec-muted); }
.note__cta a { text-decoration: none; letter-spacing: var(--ec-tracking-label);
               text-transform: uppercase; font-size: var(--ec-step--1); color: var(--ec-accent); }
/* Same specificity trap as the footer: `.note p` (0,1,1) outranks `.foot-label`
   (0,1,0). On the light aside the accent is the intended colour and clears AA. */
.note .foot-label { color: var(--ec-accent); }

/* ---- grids + cards ---- */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 44px 40px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.card h3 { margin-bottom: 6px; }
.card h3 a { text-decoration: none; }
.card-tag { color: var(--ec-accent); font-size: var(--ec-step--1); margin-bottom: 12px; }
.card > p { color: var(--ec-muted); }
.grid--principles .card { border: var(--ec-rule) solid var(--ec-hairline); padding: 26px 24px; }
.card--mark .fig--mark { width: 64px; height: 56px; color: var(--ec-ink); margin-bottom: 14px; display: block; }

.detail { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
          gap: 12px 48px; padding-top: 38px; border-top: var(--ec-rule) solid var(--ec-hairline);
          margin-top: 38px; }
.detail:first-of-type { border-top: 0; margin-top: 0; padding-top: 0; }
.detail__head h3 { margin-bottom: 4px; }
.detail__body p { color: var(--ec-muted); }
.detail .figure { grid-column: 1 / -1; margin-top: 6px; }

.ticks { list-style: none; margin: 0; padding: 0; }
.ticks li { padding-left: 22px; position: relative; margin-bottom: 7px; color: var(--ec-muted); }
.ticks li::before { content: ""; position: absolute; left: 0; top: 0.72em;
                    width: 12px; height: var(--ec-rule); background: var(--ec-accent); }

.steps, .stages { counter-reset: s; list-style: none; margin: 0 0 22px; padding: 0; }
.steps li, .stages li { padding-left: 46px; position: relative; margin-bottom: 16px; }
.steps li::before, .stages li::before {
  counter-increment: s; content: counter(s, decimal-leading-zero);
  position: absolute; left: 0; top: 0.15em; color: var(--ec-accent);
  font-size: var(--ec-step--1); letter-spacing: .1em; }
.stages li { margin-bottom: 30px; padding-bottom: 26px;
             border-bottom: var(--ec-rule) solid var(--ec-hairline); }
.stages li:last-child { border-bottom: 0; }
.stages p { color: var(--ec-muted); max-width: 66ch; margin: 0; }

/* ---- figures ---- */
/* Wide diagrams scroll inside their own container rather than scaling down with
   the viewport: at 320px a five-stage flow shrank to 22px tall, which makes its
   labels unreadable. The page body still never scrolls horizontally. */
.figure { margin: 26px 0 0; color: var(--ec-ink); overflow-x: auto; }
.figure .fig { width: 100%; height: auto; display: block; }
.figure--wide { margin-top: 34px; }
figcaption { font-size: var(--ec-step--1); color: var(--ec-muted); margin-top: 14px;
             padding-top: 12px; border-top: var(--ec-rule) solid var(--ec-hairline);
             max-width: 62ch; }

/* ---- faq ---- */
.faqs { border-top: var(--ec-rule) solid var(--ec-hairline); max-width: 78ch; }
.faq { border-bottom: var(--ec-rule) solid var(--ec-hairline); }
.faq summary { cursor: pointer; padding: 18px 0; font-family: var(--ec-font-display);
               font-size: var(--ec-step-1); list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; float: right; color: var(--ec-accent); }
.faq[open] summary::after { content: "\2013"; }
.faq p { color: var(--ec-muted); margin: 0 0 20px; max-width: 66ch; }

.commits { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px;
            margin-top: clamp(44px, 5vw, 66px); padding-top: 34px;
            border-top: var(--ec-rule) solid var(--ec-hairline); }
.commit h3 { font-size: var(--ec-step-0); margin-bottom: 6px; }
.commit p { color: var(--ec-muted); font-size: var(--ec-step--1); margin: 0; }

/* The address is one unbreakable token; at 1.5rem it forced a 345px column
   inside a 320px viewport. Fluid size plus a break rule keeps it on screen. */
.mail { font-family: var(--ec-font-display); overflow-wrap: anywhere;
        font-size: clamp(1.0625rem, 5.2vw, 1.5rem); }

/* ---- footer ---- */
/* A fixed black-and-ivory block in BOTH themes. It overrides the inverting brand
   tokens locally rather than following them: --ec-ink/--ec-surface swap with the
   theme, so inheriting them would flip the footer to ivory-on-black in dark mode.
   Overriding the tokens (rather than every rule) leaves the footer rules below
   working unchanged. The accent takes its lifted variant — the pair that holds
   contrast on near-black. */
.site-foot {
  background: #0B0B0C;
  color: #F7F5F0;
  --ec-ink: #F7F5F0;
  --ec-accent: #C25F70;   /* footer is always dark — use the lift */
  --ec-muted: #9A958C;
  --ec-hairline: rgba(247, 245, 240, 0.16);
  /* the last band is dark on some pages; the hairline keeps that seam visible */
  border-top: var(--ec-rule) solid rgba(247, 245, 240, 0.16);
  padding: 62px 0 44px;
}
.foot-top { display: flex; justify-content: space-between; align-items: flex-start;
            gap: 32px; margin-bottom: 40px; }
.foot-brand { color: var(--ec-ink); }
.foot-brand .wm { width: 268px; height: auto; display: block; }
.foot-nav ul { list-style: none; margin: 0; padding: 0; display: grid;
               grid-template-columns: repeat(2, auto); gap: 6px 32px;
               font-size: var(--ec-step--1); letter-spacing: var(--ec-tracking-label);
               text-transform: uppercase; }
.foot-nav a { text-decoration: none; color: var(--ec-muted); }
.foot-cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; margin-bottom: 42px; }
.foot-label--spaced { margin-top: 22px; }
.foot-label { font-size: var(--ec-step--1); letter-spacing: var(--ec-tracking-label);
              text-transform: uppercase; color: var(--ec-accent); margin-bottom: 8px; }
.foot-cols p { color: var(--ec-muted); margin: 0; }
/* `.foot-cols p` (0,1,1) outranks `.foot-label` (0,1,0), so the labels silently
   lost their colour. Restored with matching specificity — but in ivory, not the
   accent: bordeaux-lift on near-black measures ~3.1:1, which fails AA for text
   this small. Ivory gives the hierarchy and passes comfortably. */
.site-foot .foot-label { color: var(--ec-ink); }
.foot-note { font-size: var(--ec-step--1); color: var(--ec-muted); max-width: 90ch;
             padding-top: 26px; border-top: var(--ec-rule) solid var(--ec-hairline); }
.foot-copy { font-size: var(--ec-step--1); color: var(--ec-muted); margin: 0; }

/* ---- responsive ---- */
@media (max-width: 1040px) {
  .site-head nav ul { gap: 18px; }
  .brand .wm { width: 200px; }
}
@media (max-width: 900px) {
  .hero--fig .hero__inner { grid-template-columns: 1fr; }
  .hero__fig { order: -1; }
  .split, .split--wide { grid-template-columns: 1fr; gap: 28px; }
  .detail { grid-template-columns: 1fr; gap: 18px; }
  .grid-3, .commits { grid-template-columns: repeat(2, 1fr); }
  .foot-top { flex-direction: column; }
}
@media (max-width: 860px) {
  .fig--flow { min-width: 560px; }
  .fig--structure { min-width: 620px; }
  .figure { padding-bottom: 6px; }
}
@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .site-head nav { display: none; width: 100%; }
  .site-head nav.open { display: block; }
  .head-inner { flex-wrap: wrap; padding-bottom: 14px; }
  .site-head nav ul { flex-direction: column; gap: 14px; padding: 12px 0 4px; }
  .brand .wm { width: 196px; }
  .grid-2, .grid-3, .foot-cols, .commits { grid-template-columns: 1fr; }
  .grid-2 { gap: 36px; }
  .foot-nav ul { grid-template-columns: 1fr; }
}