/* CloudRING site. Design idea: an open blueprint. Cyanotype paper and Prussian ink,
   DIN for structure (the standards typeface), Charter for reading, evidence in the margin. */

:root {
  --paper: #EDF1F6;
  --paper-deep: #E0E7F0;
  --grid: #DAE2EC;
  --ink: #14213A;
  --ink-soft: #3D4A63;
  --prussian: #1C3F8F;
  --prussian-deep: #102B63;
  --on-deep: #EEF2F8;
  --on-deep-soft: #B9C7E0;
  --line: #B4C0D2;
  --line-strong: #71839F;
  --signal: #985000;
  --ok: #24653F;
  --plan: #4F5E78;
  --blocked: #9A2B2B;
  --focus: #C26A00;

  --font-display: "DIN Alternate", "DIN Next", Bahnschrift, "D-DIN", "Roboto Condensed", "Arial Narrow", sans-serif;
  --font-text: Charter, "Bitstream Charter", "Sitka Text", Cambria, "Noto Serif", Georgia, serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --measure: 37rem;
  --note-w: 15rem;
  --gutter: 2.5rem;
  --page-max: calc(var(--measure) + var(--note-w) + var(--gutter));
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0E1F45;
    --paper-deep: #132958;
    --grid: #16305F;
    --ink: #E9EEF7;
    --ink-soft: #B6C3DA;
    --prussian: #A8C2FF;
    --prussian-deep: #0A1736;
    --on-deep: #E9EEF7;
    --on-deep-soft: #AEBCD6;
    --line: #2F4A7E;
    --line-strong: #6F86B4;
    --signal: #F0B15C;
    --ok: #86D9A5;
    --plan: #A6B3CC;
    --blocked: #FF9F9F;
    --focus: #F0B15C;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html {
  background: var(--paper);
  color: var(--ink);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-text);
  font-size: 1.125rem;
  line-height: 1.62;
  font-kerning: normal;
  font-variant-numeric: oldstyle-nums proportional-nums;
  text-rendering: optimizeLegibility;
}

a { color: var(--prussian); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 2px; }

.skip {
  position: absolute; left: 1rem; top: -4rem; z-index: 10;
  background: var(--prussian-deep); color: var(--on-deep); padding: 0.6rem 1rem;
  font-family: var(--font-display); text-decoration: none;
}
.skip:focus { top: 1rem; }

/* Header */
.site-header { border-bottom: 1px solid var(--line); }
.bar {
  max-width: 76rem; margin: 0 auto; padding: 0.9rem 1.5rem;
  display: flex; align-items: center; gap: 1.75rem;
}
.brand {
  display: inline-flex; align-items: center; gap: 0.55rem; text-decoration: none;
  color: var(--ink); font-family: var(--font-display); font-weight: 700; font-size: 1.3rem; letter-spacing: 0.01em;
}
.brand-mark { color: var(--prussian); }
.brand-text { white-space: nowrap; }
.brand-owner { letter-spacing: 0.08em; }
.brand-project { color: var(--prussian); }
.brand-node { fill: var(--signal); }
.nav-wide { margin-left: auto; }
.nav-wide ul, .nav-narrow ul { list-style: none; margin: 0; padding: 0; }
.nav-wide ul { display: flex; gap: 1.4rem; }
.nav-wide a, .nav-narrow a, .source-link {
  font-family: var(--font-display); font-weight: 700; font-size: 1rem; color: var(--ink);
  text-decoration: none; padding: 0.35rem 0; display: inline-block;
}
.nav-wide a[aria-current="page"] { color: var(--prussian); box-shadow: inset 0 -2px 0 var(--prussian); }
.nav-wide a:hover, .source-link:hover { color: var(--prussian); }
.source-link {
  border: 1.5px solid var(--prussian); color: var(--prussian); padding: 0.3rem 0.8rem; border-radius: 3px;
}
.nav-narrow { display: none; margin-left: auto; position: relative; }
.nav-narrow summary {
  font-family: var(--font-display); font-weight: 700; cursor: pointer; list-style: none;
  border: 1.5px solid var(--ink); padding: 0.35rem 0.9rem; border-radius: 3px; min-height: 2.75rem;
  display: inline-flex; align-items: center;
}
.nav-narrow summary::-webkit-details-marker { display: none; }
.nav-narrow[open] nav {
  position: absolute; right: 0; top: calc(100% + 0.5rem); z-index: 5; min-width: 15rem;
  background: var(--paper); border: 1px solid var(--line-strong); padding: 0.5rem 1rem;
}
.nav-narrow li a { padding: 0.6rem 0; width: 100%; }

@media (max-width: 62rem) {
  .nav-wide, .source-link { display: none; }
  .nav-narrow { display: block; }
}

/* Document column with margin notes */
main { padding: 0 1.5rem; }
.doc {
  max-width: var(--page-max); margin: 0 auto; padding: 3rem calc(var(--note-w) + var(--gutter)) 4rem 0;
  counter-reset: none;
}
.doc > * { max-width: var(--measure); }
.doc > .wide, .doc > .scroll, .doc > table, .doc > figure, .doc > .hero, .doc > .routes, .doc > pre, .doc > .goal-list {
  max-width: none; margin-right: calc(-1 * (var(--note-w) + var(--gutter)));
  clear: right;
}

h1, h2, h3, h4 {
  font-family: var(--font-display); font-weight: 700; color: var(--ink);
  line-height: 1.08; letter-spacing: -0.005em; text-wrap: balance;
}
h1 { font-size: clamp(2.3rem, 1.3rem + 3.6vw, 4.2rem); margin: 0 0 1.25rem; }
h2 { font-size: clamp(1.55rem, 1.2rem + 1.2vw, 2.15rem); margin: 3.4rem 0 1rem; padding-top: 1.4rem; border-top: 1px solid var(--line); }
h3 { font-size: 1.28rem; margin: 2rem 0 0.6rem; }
p, ul, ol, dl { margin: 0 0 1.1rem; }
li { margin-bottom: 0.35rem; }
li::marker { color: var(--line-strong); }
strong { font-weight: 700; }
p { hyphens: manual; text-wrap: pretty; }

.lead { font-size: 1.3rem; line-height: 1.5; color: var(--ink); }
.dek { font-size: 1.22rem; line-height: 1.5; color: var(--ink-soft); }

/* Margin notes: evidence for the paragraph that follows */
.note {
  float: right; clear: right; width: var(--note-w);
  margin: 0.3rem calc(-1 * (var(--note-w) + var(--gutter))) 1rem 0;
  font-family: var(--font-display); font-weight: 400; font-size: 0.92rem; line-height: 1.4; color: var(--ink-soft);
  border-top: 2px solid var(--prussian); padding-top: 0.45rem;
}
.note p { margin: 0 0 0.4rem; }
.note a { color: var(--prussian); }

/* Status chips: the state of a capability, as recorded in the repository */
.state {
  display: inline-block; font-family: var(--font-display); font-weight: 700; font-size: 0.85rem;
  line-height: 1.2; padding: 0.15rem 0.5rem 0.12rem; border: 1.5px solid currentColor; border-radius: 2px;
  white-space: nowrap; vertical-align: 0.08em;
}
.state-early, .state-in_progress, .state-experimental { color: var(--signal); }
.state-implemented, .state-delivered, .state-reference { color: var(--ok); }
.state-planned, .state-not_started, .state-post { color: var(--plan); }
.state-blocked { color: var(--blocked); }

/* Hero */
.page-home .doc { padding-top: 0; }
.hero {
  display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr); gap: 2.5rem; align-items: center;
  padding: 3.5rem 0 3rem; margin-bottom: 1rem;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 2rem 2rem; background-position: -1px -1px;
  border-bottom: 1px solid var(--line);
}
.hero h1 { font-size: clamp(2.35rem, 1.3rem + 3vw, 3.9rem); line-height: 1.02; max-width: 17ch; }
.hero .lead { max-width: 34rem; }
.hero-status {
  font-family: var(--font-display); font-size: 1rem; line-height: 1.45; color: var(--ink-soft);
  max-width: 34rem; margin: 1.4rem 0 1.6rem;
}
.hero-status .state { margin-right: 0.45rem; }
.hero-status a { white-space: nowrap; }
.actions { display: flex; flex-wrap: wrap; gap: 0.8rem; margin: 0; }
.button {
  display: inline-flex; align-items: center; min-height: 2.9rem; padding: 0.55rem 1.15rem;
  font-family: var(--font-display); font-weight: 700; font-size: 1.05rem; text-decoration: none;
  background: var(--prussian); color: var(--paper); border: 1.5px solid var(--prussian); border-radius: 3px;
}
.button:hover { background: var(--prussian-deep); border-color: var(--prussian-deep); color: var(--on-deep); }
.button-quiet { background: transparent; color: var(--prussian); }
.button-quiet:hover { background: var(--paper-deep); color: var(--prussian); border-color: var(--prussian); }

/* Ring figure */
.ring-figure { margin: 0; }
.ring-figure svg { width: 100%; height: auto; display: block; max-width: 30rem; margin-left: auto; }
.ring-figure figcaption {
  font-family: var(--font-display); font-size: 0.95rem; line-height: 1.4; color: var(--ink-soft);
  max-width: 26rem; margin: 0.6rem 0 0 auto;
}
.r-construction { fill: none; stroke: var(--line-strong); stroke-width: 1.2; }
.r-ticks { fill: none; stroke: var(--line-strong); stroke-width: 7; }
.r-ring { fill: none; stroke: var(--prussian); stroke-width: 5; }
.r-contract { fill: none; stroke: var(--prussian); stroke-width: 1.5; stroke-dasharray: 6 7; }
.r-node { fill: var(--paper); stroke: var(--prussian); stroke-width: 3; }
.r-node-live { fill: var(--signal); stroke: var(--signal); stroke-width: 3; }
.r-label { font-family: var(--font-display); font-weight: 700; font-size: 17px; fill: var(--ink); }
.r-label-soft { font-family: var(--font-display); font-size: 15px; fill: var(--ink-soft); }
.r-label-live { font-family: var(--font-display); font-weight: 700; font-size: 16px; fill: var(--signal); }

@media (prefers-reduced-motion: no-preference) {
  .r-ring { stroke-dasharray: 1257; stroke-dashoffset: 1257; animation: draw 1.8s cubic-bezier(.45,.05,.2,1) 0.15s forwards; }
  .r-node, .r-node-live, .r-label-live { opacity: 0; animation: appear 0.5s ease-out forwards; }
  .r-node-live, .r-label-live { animation-delay: 2s; }
  .r-n1 { animation-delay: 0.45s; } .r-n2 { animation-delay: 0.65s; } .r-n3 { animation-delay: 0.85s; }
  .r-n4 { animation-delay: 1.05s; } .r-n5 { animation-delay: 1.25s; } .r-n6 { animation-delay: 1.45s; }
  .r-n7 { animation-delay: 1.65s; } .r-n8 { animation-delay: 1.85s; }
}
@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes appear { to { opacity: 1; } }

/* Lists of capabilities, routes and goals */
.facts { padding-left: 1.2rem; }
.facts li { margin-bottom: 0.6rem; }

.routes {
  list-style: none; padding: 0; margin: 1.5rem 0 1rem;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr)); column-gap: 2.5rem;
}
.routes li { margin: 0; border-top: 1px solid var(--line-strong); }
.routes a { display: block; padding: 0.9rem 0 1.2rem; text-decoration: none; color: var(--ink); }
.routes a:hover .route-name { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 0.18em; }
.route-name { display: block; font-family: var(--font-display); font-weight: 700; font-size: 1.3rem; color: var(--prussian); margin-bottom: 0.2rem; }
.route-text { display: block; color: var(--ink-soft); font-size: 1.02rem; line-height: 1.5; }

.goal-list { list-style: none; padding: 0; margin: 1.2rem 0 1.5rem; border-top: 1px solid var(--line-strong); }
.goal-list li {
  display: grid; grid-template-columns: 4.2rem minmax(0, 1fr) auto; gap: 1rem; align-items: baseline;
  padding: 0.55rem 0; margin: 0; border-bottom: 1px solid var(--line);
}
.goal-id { font-family: var(--font-display); font-weight: 700; color: var(--ink-soft); }
.goal-name { font-family: var(--font-text); }

/* Tables */
table { width: 100%; border-collapse: collapse; margin: 1.2rem 0 1.8rem; font-size: 1rem; line-height: 1.45; }
thead th {
  font-family: var(--font-display); font-weight: 700; text-align: left; color: var(--ink);
  border-bottom: 2px solid var(--ink); padding: 0.5rem 0.9rem 0.45rem 0;
}
tbody td { border-bottom: 1px solid var(--line); padding: 0.6rem 0.9rem 0.6rem 0; vertical-align: top; }
tbody td:first-child { font-family: var(--font-display); font-weight: 700; }

/* Code */
code { font-family: var(--font-mono); font-size: 0.86em; background: var(--paper-deep); padding: 0.08em 0.3em; border-radius: 2px; }
pre {
  background: var(--prussian-deep); color: var(--on-deep); padding: 1.1rem 1.25rem; overflow-x: auto;
  border-radius: 3px; font-size: 0.95rem; line-height: 1.55; margin: 1rem 0 1.6rem;
}
pre code { background: none; padding: 0; color: inherit; font-size: inherit; }

/* Callout for status and warnings */
.callout {
  border-left: 4px solid var(--signal); padding: 0.2rem 0 0.2rem 1rem; margin: 1.4rem 0 1.6rem;
  font-family: var(--font-display); font-size: 1.05rem; line-height: 1.5;
}
.callout p:last-child { margin-bottom: 0; }

/* Architecture diagram */
.diagram { margin: 1.5rem 0 2rem; }
.diagram svg { width: 100%; height: auto; display: block; }
.diagram figcaption { font-family: var(--font-display); font-size: 0.95rem; color: var(--ink-soft); margin-top: 0.6rem; max-width: var(--measure); }
.d-box { fill: var(--paper); stroke: var(--prussian); stroke-width: 2; }
.d-box-strong { fill: var(--prussian); stroke: var(--prussian); stroke-width: 2; }
.d-box-soft { fill: var(--paper-deep); stroke: var(--line-strong); stroke-width: 1.5; }
.d-box-future { fill: none; stroke: var(--line-strong); stroke-width: 1.5; stroke-dasharray: 6 6; }
.d-line { stroke: var(--line-strong); stroke-width: 1.8; fill: none; }
.d-line-future { stroke: var(--line-strong); stroke-width: 1.8; fill: none; stroke-dasharray: 6 6; }
.d-title { font-family: var(--font-display); font-weight: 700; font-size: 19px; fill: var(--ink); }
.d-title-inv { font-family: var(--font-display); font-weight: 700; font-size: 19px; fill: var(--paper); }
.d-text { font-family: var(--font-display); font-size: 14.5px; fill: var(--ink-soft); }
.d-text-inv { font-family: var(--font-display); font-size: 14.5px; fill: var(--paper-deep); }

/* Footer */
.site-footer { background: var(--prussian-deep); color: var(--on-deep); margin-top: 2rem; }
.foot { max-width: 76rem; margin: 0 auto; padding: 2.4rem 1.5rem 2.6rem; }
.foot a { color: var(--on-deep); }
.foot-lead { font-size: 1.05rem; max-width: 40rem; }
.site-footer ul { list-style: none; padding: 0; margin: 1.2rem 0; display: flex; flex-wrap: wrap; gap: 0.4rem 1.6rem; }
.site-footer li { margin: 0; }
.site-footer nav a { font-family: var(--font-display); font-weight: 700; text-decoration: none; display: inline-block; padding: 0.3rem 0; }
.site-footer nav a:hover { text-decoration: underline; }
.foot-meta { font-family: var(--font-display); font-size: 0.92rem; color: var(--on-deep-soft); margin: 0; }
.foot-meta a { color: var(--on-deep-soft); }

/* Narrow screens: notes drop into the text column */
@media (max-width: 64rem) {
  .doc { padding-right: 0; }
  .doc > *, .doc > .wide, .doc > .scroll, .doc > table, .doc > figure, .doc > .hero, .doc > .routes, .doc > pre, .doc > .goal-list { margin-right: 0; }
  .note {
    float: none; width: auto; margin: 0 0 1rem; padding: 0.4rem 0 0 0.9rem;
    border-top: 0; border-left: 2px solid var(--prussian);
  }
  .hero { grid-template-columns: 1fr; padding-top: 2.4rem; }
  .ring-figure svg { margin: 0 auto; max-width: 24rem; }
  .ring-figure figcaption { margin: 0.6rem auto 0; text-align: center; }

}

@media (max-width: 30rem) {
  body { font-size: 1.06rem; }
  main { padding: 0 1.1rem; }
  .bar { padding: 0.8rem 1.1rem; gap: 0.75rem; }
  .brand { font-size: 1.12rem; }
  .goal-list li { grid-template-columns: 3.4rem minmax(0, 1fr); }
  .goal-list .state { grid-column: 2; justify-self: start; }
}

@media print {
  .site-header, .site-footer, .skip { display: none; }
  .doc { padding-right: 0; }
  .note { float: none; width: auto; margin: 0 0 0.8rem; }
  a { color: inherit; }
}

/* Wide tables scroll inside their own region instead of the page */
.scroll { overflow-x: auto; }
.scroll table { margin: 0.4rem 0 1rem; }
.nav-wide a[aria-current="true"] { color: var(--prussian); }
.nav-narrow a[aria-current="page"], .nav-narrow a[aria-current="true"] { color: var(--prussian); text-decoration: underline; text-underline-offset: 0.25em; }
@media (forced-colors: active) {
  .nav-wide a[aria-current="page"] { box-shadow: none; border-bottom: 2px solid CanvasText; }
  .state { forced-color-adjust: none; }
}
@media (max-width: 40rem) {
  .diagram { overflow-x: auto; }
  .diagram svg { min-width: 40rem; }
}