/* Pure Vault site styles.
   One light theme on purpose: the pages show the light app captures, and the
   product brief calls for calm over cleverness. The palette extends the app's
   own tokens (docs/DESIGN.md): sage paper, evergreen ink, one mineral-green
   action color, and a rationed ember amber that only ever marks evidence. */

@font-face {
  font-family: "Source Sans 3";
  src: url("fonts/source-sans-3-latin-wght-normal.woff2") format("woff2-variations");
  font-style: normal;
  font-weight: 200 900;
  font-display: swap;
}

:root {
  --paper: #eef1ec;
  --paper-deep: #e5eae3;
  --card: #f9fbf8;
  --ink: #1c2420;
  --ink-soft: #49564f;
  --ink-faint: #66736b;
  --line: #ccd5cd;
  --line-soft: #dde3dc;
  --pine: #0b675a;
  --pine-deep: #07564c;
  --pine-wash: #dcece7;
  --ember: #8a5a11;      /* small amber text, borrowed from the app's warning token */
  --ember-warm: #c77a24; /* the provenance mark color, larger uses only */
  --vault: #14201a;     /* the one dark band */
  --vault-2: #1c2b23;
  --vault-line: #33453a;
  --on-vault: #e9efe9;
  --on-vault-soft: #aebcb2;
  --mint: #85d3c2;
  --ember-bright: #e2a55e;
  --focus: #006f61;
  --max: 72rem;
  --prose: 44rem;
  --r-control: 6px;
  --r-panel: 10px;
  --sans: "Source Sans 3", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Monaco, Consolas, monospace;
  --quick: 140ms ease-out;
}

* { box-sizing: border-box; }

html {
  color-scheme: light;
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.045rem;
  line-height: 1.62;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; height: auto; }

a {
  color: var(--pine);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
  text-decoration-color: color-mix(in srgb, var(--pine) 45%, transparent);
  transition: color var(--quick), text-decoration-color var(--quick);
}
a:hover { color: var(--pine-deep); text-decoration-color: currentcolor; }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 2px;
}

code, pre { font-family: var(--mono); }

.wrap {
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--pine);
  color: #fff;
  padding: 0.6rem 1rem;
  z-index: 20;
  border-radius: 0 0 var(--r-control) 0;
}
.skip-link:focus { left: 0; }

/* ------- header ------- */

.site-header {
  border-bottom: 1px solid var(--line-soft);
  background: var(--paper);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--ink);
  font-weight: 680;
  font-size: 1.12rem;
  letter-spacing: -0.01em;
}
.brand svg { width: 30px; height: 30px; flex: none; }
.brand:hover { color: var(--pine-deep); }

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(0.9rem, 2.5vw, 1.6rem);
  white-space: nowrap;
}
.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}
.site-nav a:hover { color: var(--pine-deep); }
.site-nav a[aria-current="page"] { color: var(--ink); }

@media (max-width: 480px) {
  .brand span { font-size: 1.02rem; }
  .site-nav { gap: 0.8rem; }
  .site-nav a { font-size: 0.88rem; }
}

/* ------- shared blocks ------- */

section { padding-block: clamp(3.2rem, 7vw, 5.5rem); }

h1, h2, h3 { line-height: 1.12; letter-spacing: -0.018em; margin: 0 0 0.6em; }
h1 { font-size: clamp(2.1rem, 4.4vw, 3.05rem); font-weight: 740; }
h2 { font-size: clamp(1.55rem, 3vw, 2.05rem); font-weight: 700; }
h3 { font-size: 1.15rem; font-weight: 650; letter-spacing: -0.008em; }

.lead {
  color: var(--ink-soft);
  font-size: 1.12rem;
  max-width: var(--prose);
  margin: 0 0 1rem;
}

p { margin: 0 0 1rem; max-width: var(--prose); }
ul, ol { max-width: var(--prose); }

.muted { color: var(--ink-faint); }
.small { font-size: 0.92rem; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--pine);
  color: #fff;
  border: 1px solid var(--pine);
  border-radius: var(--r-control);
  padding: 0.72rem 1.25rem;
  font-weight: 650;
  font-size: 1rem;
  text-decoration: none;
  transition: background var(--quick), transform var(--quick);
}
.btn:hover { background: var(--pine-deep); color: #fff; }
.btn:active { transform: translateY(1px); }

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn-ghost:hover { background: var(--card); border-color: var(--ink-faint); color: var(--ink); }

/* ------- hero ------- */

.hero { padding-block: clamp(2.8rem, 6vw, 4.5rem) clamp(2.6rem, 5vw, 4rem); }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 33rem) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.hero .lead { font-size: 1.16rem; }

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.6rem;
}

.shot {
  border: 1px solid var(--line);
  border-radius: var(--r-panel);
  overflow: hidden;
  background: var(--card);
  box-shadow: 0 18px 44px -28px rgba(23, 32, 28, 0.45);
}
.shot img { width: 100%; }

.shot-caption {
  margin-top: 0.65rem;
  font-size: 0.88rem;
  color: var(--ink-faint);
  max-width: none;
}

@media (max-width: 940px) {
  .hero-grid { grid-template-columns: 1fr; }
}

/* ------- status facts strip ------- */

.facts {
  padding-block: 0 clamp(3rem, 6vw, 4.5rem);
}
.facts-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-block: 1px solid var(--line-soft);
}
.fact {
  padding: 1.35rem 1.4rem 1.35rem 0;
}
.fact + .fact { border-left: 1px solid var(--line-soft); padding-left: 1.4rem; }
.fact strong { display: block; font-size: 1.02rem; font-weight: 680; margin-bottom: 0.3rem; }
.fact span { color: var(--ink-soft); font-size: 0.93rem; line-height: 1.5; display: block; }

@media (max-width: 900px) {
  .facts-grid { grid-template-columns: 1fr 1fr; }
  .fact { padding: 1.1rem 1.2rem 1.1rem 0; }
  .fact:nth-child(3) { border-left: none; padding-left: 0; }
  .fact:nth-child(n + 3) { border-top: 1px solid var(--line-soft); }
}
@media (max-width: 540px) {
  .facts-grid { grid-template-columns: 1fr; }
  .fact + .fact { border-left: none; padding-left: 0; border-top: 1px solid var(--line-soft); }
}

/* ------- what it opens ------- */

.opens { background: var(--paper-deep); }

.opens-flagship {
  margin-top: 2.2rem;
  border: 1px solid var(--line);
  border-radius: var(--r-panel);
  background: var(--card);
  padding: clamp(1.4rem, 3vw, 2.2rem);
}
.opens-flagship > h3 { margin-bottom: 0.35rem; }
.opens-flagship > p { color: var(--ink-soft); margin-bottom: 1.4rem; }

.source-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.2rem 2.6rem;
}
.source-grid > div {
  display: grid;
  grid-template-columns: minmax(9.5rem, 13rem) 1fr;
  gap: 1rem;
  padding-block: 0.72rem;
  border-top: 1px solid var(--line-soft);
}
.source-grid > div:nth-child(-n + 2) { border-top: none; }
.source-grid dt { font-weight: 650; }
.source-grid dd { margin: 0; color: var(--ink-soft); font-size: 0.95rem; }

@media (max-width: 860px) {
  .source-grid { grid-template-columns: 1fr; }
  .source-grid > div:nth-child(2) { border-top: 1px solid var(--line-soft); }
}
@media (max-width: 520px) {
  .source-grid > div { grid-template-columns: 1fr; gap: 0.15rem; }
}

.opens-rest {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1.6rem 2.4rem;
}
.opens-rest h3 { margin-bottom: 0.3rem; }
.opens-rest p { color: var(--ink-soft); font-size: 0.95rem; margin: 0; }

@media (max-width: 860px) { .opens-rest { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .opens-rest { grid-template-columns: 1fr; } }

.opens-note { margin-top: 1.8rem; color: var(--ink-soft); font-size: 0.95rem; }

/* ------- how it works ------- */

.journey-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 27rem);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}

.journey-steps {
  list-style: none;
  counter-reset: step;
  margin: 1.4rem 0 0;
  padding: 0;
}
.journey-steps li {
  counter-increment: step;
  position: relative;
  padding: 0 0 1.7rem 3.1rem;
}
.journey-steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 1.55rem;
  height: 1.55rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--card);
  font-size: 0.85rem;
  color: var(--pine);
  font-weight: 680;
}
.journey-steps li::after {
  content: "";
  position: absolute;
  left: 0.75rem;
  top: 1.7rem;
  bottom: 0.5rem;
  width: 1px;
  background: var(--line);
}
.journey-steps li:last-child { padding-bottom: 0; }
.journey-steps li:last-child::after { display: none; }
.journey-steps h3 { margin-bottom: 0.25rem; }
.journey-steps p { color: var(--ink-soft); font-size: 0.97rem; margin: 0; }

@media (max-width: 940px) {
  .journey-grid { grid-template-columns: 1fr; }
  .journey-grid .shot-col { order: 2; }
}

/* ------- evidence tiers: the dark band ------- */

.tiers {
  background: var(--vault);
  color: var(--on-vault);
}
.tiers h2 { color: var(--on-vault); }
.tiers .lead { color: var(--on-vault-soft); }
.tiers a { color: var(--mint); text-decoration-color: color-mix(in srgb, var(--mint) 45%, transparent); }
.tiers a:hover { color: #a9e4d6; }
.tiers :focus-visible { outline-color: var(--mint); }

.tier-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 21rem);
  gap: clamp(2.2rem, 5vw, 4rem);
  align-items: start;
  margin-top: 2.4rem;
}

.tier-list { display: grid; gap: 1.1rem; }

.tier {
  display: grid;
  grid-template-columns: 9.2rem 1fr;
  gap: 1.2rem;
  padding: 1.15rem 0 1.35rem;
  border-top: 1px solid var(--vault-line);
  align-items: start;
}
.tier p { color: var(--on-vault-soft); margin: 0; font-size: 0.99rem; }
.tier h3 { color: var(--on-vault); margin-bottom: 0.3rem; }

.tier-chip {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 650;
  letter-spacing: 0.01em;
  padding: 0.3rem 0.75rem;
  border-radius: var(--r-control);
  margin-top: 0.15rem;
}
.tier-chip.is-verified {
  color: var(--on-vault-soft);
  border: 1px dashed var(--vault-line);
  background: transparent;
}
.tier-chip.is-preview {
  color: var(--vault);
  background: var(--mint);
  border: 1px solid var(--mint);
}
.tier-chip.is-experimental {
  color: var(--ember-bright);
  border: 1px solid color-mix(in srgb, var(--ember-bright) 55%, transparent);
  background: transparent;
}

@media (max-width: 640px) {
  .tier { grid-template-columns: 1fr; gap: 0.5rem; }
}

.tier-aside .shot {
  box-shadow: 0 18px 44px -24px rgba(0, 0, 0, 0.6);
  border-color: var(--vault-line);
}
.tier-aside .shot-caption { color: var(--on-vault-soft); }

.tier-health {
  margin-top: 1.6rem;
  border: 1px solid var(--vault-line);
  border-radius: var(--r-panel);
  background: var(--vault-2);
  padding: 1.2rem 1.4rem;
}
.tier-health h3 { color: var(--on-vault); margin-bottom: 0.4rem; }
.tier-health p { color: var(--on-vault-soft); font-size: 0.96rem; margin: 0 0 0.6rem; }
.tier-health p:last-child { margin-bottom: 0; }
.tier-health strong { color: var(--ember-bright); font-weight: 650; }

@media (max-width: 940px) {
  .tier-grid { grid-template-columns: 1fr; }
  .tier-aside { max-width: 24rem; }
}

/* ------- privacy boundaries ------- */

.boundary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.7rem 3rem;
  margin-top: 2.2rem;
}
.boundary-grid h3 { margin-bottom: 0.3rem; }
.boundary-grid p { color: var(--ink-soft); font-size: 0.97rem; margin: 0; }

@media (max-width: 760px) { .boundary-grid { grid-template-columns: 1fr; } }

/* ------- will not do ------- */

.refusals { background: var(--paper-deep); }

.refusal-panel {
  margin-top: 2rem;
  border: 1px solid var(--line);
  border-radius: var(--r-panel);
  background: var(--card);
  padding: clamp(1.4rem, 3vw, 2rem);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 2.6rem;
}
.refusal-panel ul {
  margin: 0;
  padding: 0;
  list-style: none;
  max-width: none;
}
.refusal-panel li {
  padding: 0.6rem 0;
  border-top: 1px solid var(--line-soft);
  color: var(--ink-soft);
}
.refusal-panel li:first-child { border-top: none; }
.refusal-panel li strong { color: var(--ink); font-weight: 650; }

@media (max-width: 700px) {
  .refusal-panel { grid-template-columns: 1fr; }
  .refusal-panel ul + ul li:first-child { border-top: 1px solid var(--line-soft); }
}

/* ------- install ------- */

.codeblock {
  position: relative;
  background: var(--vault);
  color: var(--on-vault);
  border-radius: var(--r-panel);
  border: 1px solid var(--vault-line);
  margin: 1.1rem 0 1.6rem;
  max-width: 46rem;
}
.codeblock pre {
  margin: 0;
  padding: 1.05rem 1.2rem;
  overflow-x: auto;
  font-size: 0.9rem;
  line-height: 1.65;
}
.codeblock .copy-btn {
  position: absolute;
  top: 0.55rem;
  right: 0.55rem;
  font: 600 0.78rem var(--sans);
  color: var(--on-vault-soft);
  background: var(--vault-2);
  border: 1px solid var(--vault-line);
  border-radius: var(--r-control);
  padding: 0.3rem 0.65rem;
  cursor: pointer;
  transition: color var(--quick), border-color var(--quick);
}
.codeblock .copy-btn:hover { color: var(--on-vault); border-color: var(--on-vault-soft); }
.codeblock .copy-btn:focus-visible { outline-color: var(--mint); }

.install h3 { margin-top: 2.1rem; }
.install h3:first-of-type { margin-top: 1.8rem; }

/* ------- FAQ ------- */

.faq details {
  border-top: 1px solid var(--line-soft);
  max-width: var(--prose);
}
.faq details:last-of-type { border-bottom: 1px solid var(--line-soft); }
.faq summary {
  cursor: pointer;
  font-weight: 650;
  font-size: 1.05rem;
  padding: 1.05rem 1.8rem 1.05rem 0;
  list-style: none;
  position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 0.2rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--pine);
  font-weight: 500;
  font-size: 1.3rem;
}
.faq details[open] summary::after { content: "\2212"; }
.faq details > p, .faq details > ul { color: var(--ink-soft); margin: 0 0 1.1rem; }

/* ------- footer ------- */

.site-footer {
  border-top: 1px solid var(--line-soft);
  background: var(--paper-deep);
  padding-block: 2.6rem 2.2rem;
  font-size: 0.94rem;
}
.footer-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1.8rem 3rem;
  margin-bottom: 1.9rem;
}
.footer-top .brand { font-size: 1.05rem; }
.footer-top p { color: var(--ink-soft); margin: 0.7rem 0 0; max-width: 26rem; }

.footer-nav { display: grid; grid-auto-flow: column; grid-template-rows: repeat(3, auto); gap: 0.45rem 2.6rem; }
.footer-nav a { color: var(--ink-soft); text-decoration: none; font-weight: 600; }
.footer-nav a:hover { color: var(--pine-deep); text-decoration: underline; }

.footer-legal {
  border-top: 1px solid var(--line);
  padding-top: 1.3rem;
  color: var(--ink-faint);
  font-size: 0.87rem;
}
.footer-legal p { margin: 0 0 0.4rem; max-width: none; }

@media (max-width: 560px) {
  .footer-nav { grid-auto-flow: row; grid-template-rows: none; grid-template-columns: 1fr 1fr; }
}

/* ------- inner pages ------- */

.page-head { padding-block: clamp(2.6rem, 5vw, 4rem) 0; }
.page-head .lead { margin-bottom: 0; }

.prose { padding-block: 2rem 4rem; }
.prose h2 { margin-top: 2.6rem; }
.prose h3 { margin-top: 1.9rem; }
.prose ul { padding-left: 1.2rem; }
.prose li { margin-bottom: 0.45rem; color: var(--ink-soft); }
.prose li strong, .prose p strong { color: var(--ink); }
.prose hr { border: none; border-top: 1px solid var(--line-soft); margin: 2.4rem 0; }

.date-note { color: var(--ink-faint); font-size: 0.9rem; }

/* compatibility tables */

.table-scroll { overflow-x: auto; margin: 1.2rem 0 0.6rem; }
table {
  border-collapse: collapse;
  width: 100%;
  min-width: 700px;
  font-size: 0.95rem;
}
th {
  text-align: left;
  font-weight: 680;
  padding: 0.6rem 1.1rem 0.6rem 0;
  border-bottom: 2px solid var(--line);
  white-space: nowrap;
}
td {
  vertical-align: top;
  padding: 0.7rem 1.1rem 0.7rem 0;
  border-bottom: 1px solid var(--line-soft);
  color: var(--ink-soft);
}
td:first-child { color: var(--ink); font-weight: 650; }

.badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 650;
  padding: 0.14rem 0.55rem;
  border-radius: var(--r-control);
  white-space: nowrap;
}
.badge-preview { background: var(--pine-wash); color: var(--pine-deep); border: 1px solid #bcd8cf; }
.badge-experimental { background: #f6ecd9; color: var(--ember); border: 1px solid #e3cfa4; }

.legend {
  margin-top: 1.8rem;
  display: grid;
  gap: 1rem;
}
.legend > div {
  display: grid;
  grid-template-columns: 9.5rem 1fr;
  gap: 1.1rem;
  align-items: start;
  padding-top: 1rem;
  border-top: 1px solid var(--line-soft);
}
.legend p { margin: 0; color: var(--ink-soft); font-size: 0.97rem; max-width: none; }
.legend .tier-chip.is-verified { color: var(--ink-faint); border-color: var(--line); }
.legend .tier-chip.is-neutral {
  color: var(--ink-soft);
  border: 1px solid var(--line);
  background: var(--card);
}
.legend .tier-chip.is-preview { background: var(--pine); border-color: var(--pine); color: #fff; }
.legend .tier-chip.is-experimental { color: var(--ember); border-color: #d9b26a; }

@media (max-width: 560px) {
  .legend > div { grid-template-columns: 1fr; gap: 0.4rem; }
}

/* guide */

.guide-layout {
  display: grid;
  grid-template-columns: 13rem minmax(0, 1fr);
  gap: 3.5rem;
  align-items: start;
  padding-block: 2.2rem 4rem;
}
.guide-toc {
  position: sticky;
  top: 1.4rem;
  font-size: 0.92rem;
}
.guide-toc h2 { font-size: 0.85rem; font-weight: 680; color: var(--ink-faint); margin-bottom: 0.6rem; }
.guide-toc ol { list-style: none; margin: 0; padding: 0; }
.guide-toc li { margin-bottom: 0.45rem; }
.guide-toc a { color: var(--ink-soft); text-decoration: none; font-weight: 600; }
.guide-toc a:hover { color: var(--pine-deep); text-decoration: underline; }

.guide-body h2 { margin-top: 2.8rem; scroll-margin-top: 1.2rem; }
.guide-body h2:first-of-type { margin-top: 0; }
.guide-body .shot { max-width: 46rem; margin-top: 1.2rem; }
.guide-body .shot-narrow { max-width: 24rem; }

@media (max-width: 860px) {
  .guide-layout { grid-template-columns: minmax(0, 1fr); gap: 1.6rem; }
  .guide-toc { position: static; border-bottom: 1px solid var(--line-soft); padding-bottom: 1.2rem; }
  .guide-toc ol { display: flex; flex-wrap: wrap; gap: 0.3rem 1.3rem; }
}

/* changelog */

.release {
  border: 1px solid var(--line);
  border-radius: var(--r-panel);
  background: var(--card);
  padding: clamp(1.4rem, 3vw, 2rem);
  margin-top: 1.8rem;
  max-width: 50rem;
}
.release h2 { margin-top: 0; }
.release ul { padding-left: 1.2rem; }
.release li { margin-bottom: 0.5rem; color: var(--ink-soft); }

.release-status {
  display: inline-block;
  font-size: 0.83rem;
  font-weight: 650;
  color: var(--ember);
  background: #f6ecd9;
  border: 1px solid #e3cfa4;
  border-radius: var(--r-control);
  padding: 0.18rem 0.6rem;
  margin-left: 0.6rem;
  vertical-align: 0.28em;
}