/* ───────────────────────────────────────────────────────────────────────────
   trust.css — shared styles for the BitGarth trust pages
   (security.html · privacy.html · terms.html)

   Implements the Botanical Ledger system documented in DESIGN-SYSTEM.md
   tuned for long-form reading: narrower measure, roman-numeral subsection
   markers, generous leading. Header, footer, palette, and ornaments are
   drawn from the landing page so a visitor moving between the two never
   feels they've left the building.
   ─────────────────────────────────────────────────────────────────────── */

@font-face {
  font-family: 'Fraunces';
  src: url('fonts/fraunces-normal.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Fraunces';
  src: url('fonts/fraunces-italic.woff2') format('woff2');
  font-weight: 100 900;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: 'Instrument Sans';
  src: url('fonts/instrument-sans-normal.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'JetBrains Mono';
  src: url('fonts/jetbrains-mono-normal.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

:root {
  --paper:        #f4efe3;
  --paper-deep:   #ebe3d2;
  --paper-edge:   #ddd2b9;
  --ink:          #1a1f1a;
  --ink-soft:     #2e352e;
  --moss:         #2f4a30;
  --moss-bright:  #4a7a4d;
  --copper:       #a8693a;
  --copper-soft:  #c08856;
  --sage:         #8a9783;

  --display: "Fraunces", "Times New Roman", serif;
  --body:    "Instrument Sans", system-ui, sans-serif;
  --mono:    "JetBrains Mono", ui-monospace, "SFMono-Regular", monospace;

  --measure:   36rem;
  --gutter:    clamp(1.25rem, 4vw, 2.5rem);
  --section-y: clamp(4rem, 10vw, 7.5rem);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

html, body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.6;
  font-feature-settings: "ss01", "kern";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* parchment grain — matches index.html */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.35;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.10  0 0 0 0 0.12  0 0 0 0 0.10  0 0 0 0.06 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

/* gentle vignette — matches index.html */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(120% 80% at 50% -10%, rgba(168,105,58,0.05), transparent 60%),
    radial-gradient(120% 80% at 50% 110%, rgba(47,74,48,0.06), transparent 60%);
}

main, header, footer { position: relative; z-index: 2; }

::selection {
  background: color-mix(in srgb, var(--moss) 70%, transparent);
  color: var(--paper);
}

/* skip link */
.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--moss);
  color: var(--paper);
  padding: 0.5rem 0.85rem;
  border-radius: 6px;
  transition: top 180ms ease;
  text-decoration: none;
  z-index: 100;
}
.skip-link:focus { top: 0.6rem; outline: 2px solid var(--paper); }

/* link underline-grow */
a {
  color: var(--moss);
  text-decoration: none;
  background-image: linear-gradient(currentColor, currentColor);
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0% 1px;
  transition: background-size 220ms ease, color 180ms ease;
  padding-bottom: 1px;
}
a:hover, a:focus-visible { background-size: 100% 1px; color: var(--moss-bright); }
a:focus-visible {
  outline: 2px solid var(--moss);
  outline-offset: 4px;
  border-radius: 2px;
}

.wrap {
  width: 100%;
  max-width: 76rem;
  margin: 0 auto;
  padding-inline: var(--gutter);
}

/* ───────────────────────────── site header ───────────────────────────── */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  -webkit-backdrop-filter: blur(10px) saturate(120%);
  backdrop-filter: blur(10px) saturate(120%);
  border-bottom: 1px solid color-mix(in srgb, var(--ink) 8%, transparent);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-block: 0.95rem;
}
.wordmark {
  display: inline-block;
  font-family: var(--display);
  font-style: italic;
  font-size: 1.35rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  color: var(--ink);
  background: none !important;
  padding-bottom: 0;
}
.wordmark:hover, .wordmark:focus-visible { color: var(--ink); }

nav.primary {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
nav.primary .links {
  display: flex;
  gap: 1.4rem;
  font-size: 0.95rem;
}
nav.primary .links a {
  color: var(--ink-soft);
  letter-spacing: 0.01em;
}

.btn {
  --bg: var(--moss);
  --fg: var(--paper);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--body);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  padding: 0.68rem 1.1rem;
  border-radius: 999px;
  border: 1px solid var(--bg);
  background: var(--bg);
  color: var(--fg);
  cursor: pointer;
  text-decoration: none;
  background-image: none;
  transition: transform 140ms ease, background 180ms ease,
              color 180ms ease, border-color 180ms ease, box-shadow 220ms ease;
  box-shadow: 0 1px 0 rgba(26,31,26,0.04), 0 6px 18px -10px rgba(47,74,48,0.45);
}
.btn:hover, .btn:focus-visible {
  background: var(--moss-bright);
  border-color: var(--moss-bright);
  color: var(--paper);
  transform: translateY(-1px);
  background-image: none;
  background-size: auto;
}
.btn:active { transform: translateY(0); }
.btn:focus-visible { outline: 2px solid var(--moss); outline-offset: 3px; }
.btn .arrow { transition: transform 220ms ease; }
.btn:hover .arrow { transform: translateX(3px); }

@media (max-width: 760px) {
  nav.primary .links { display: none; }
}

/* ───────────────────────────── trust shell ───────────────────────────── */

.trust-shell {
  padding-block: clamp(3rem, 6vw, 5rem) clamp(4rem, 8vw, 6rem);
}

/* secondary nav between Security · Privacy · Terms */
.trust-tabs {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.85rem;
  font-family: var(--display);
  font-style: italic;
  font-size: 1.05rem;
  margin-bottom: clamp(2.5rem, 5vw, 3.5rem);
  padding-bottom: 1.1rem;
  border-bottom: 1px solid color-mix(in srgb, var(--ink) 12%, transparent);
  color: var(--ink-soft);
}
.trust-tabs a {
  color: var(--ink-soft);
  padding-bottom: 2px;
}
.trust-tabs a:hover, .trust-tabs a:focus-visible {
  color: var(--moss);
}
.trust-tabs a[aria-current="page"] {
  color: var(--copper);
  background-size: 100% 1px;
}
.trust-tabs span[aria-hidden] {
  color: color-mix(in srgb, var(--ink) 30%, transparent);
  font-style: italic;
  user-select: none;
}

/* ───────────────────────────── hero ───────────────────────────── */

.trust-hero {
  margin-bottom: clamp(3rem, 6vw, 4.5rem);
  max-width: 48rem;
}
.trust-hero .eyebrow {
  font-family: var(--display);
  font-style: italic;
  font-size: 0.95rem;
  color: var(--copper);
  letter-spacing: 0.04em;
  margin: 0 0 1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
}
.trust-hero .eyebrow::before {
  content: "";
  display: inline-block;
  width: 1.25rem;
  height: 1px;
  background: currentColor;
  opacity: 0.55;
}
.trust-hero h1 {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(2.4rem, 5.4vw, 4.2rem);
  line-height: 1.04;
  letter-spacing: -0.025em;
  color: var(--ink);
  margin: 0 0 1.4rem;
  max-width: 18ch;
}
.trust-hero h1 em {
  font-style: italic;
  font-weight: 400;
  color: var(--moss);
}
.trust-hero .lede {
  font-family: var(--body);
  font-size: clamp(1.05rem, 1.6vw, 1.22rem);
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 38rem;
  margin: 0;
}

/* ───────────────────────────── article ───────────────────────────── */

.trust-article {
  display: grid;
  gap: clamp(2.75rem, 5vw, 4rem);
  max-width: 44rem;
}

.trust-article > section {
  position: relative;
  padding-top: 2.25rem;
  border-top: 1px solid color-mix(in srgb, var(--ink) 16%, transparent);
}
.trust-article > section.intro {
  padding-top: 0;
  border-top: none;
}
.trust-article > section .num {
  position: absolute;
  top: -0.85rem;
  left: 0;
  background: var(--paper);
  padding-right: 0.65rem;
  font-family: var(--display);
  font-style: italic;
  font-weight: 400;
  font-size: 1.05rem;
  color: var(--moss);
  letter-spacing: 0.03em;
}

.trust-article h2 {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(1.55rem, 2.7vw, 2rem);
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 0 0 1.1rem;
  max-width: 26ch;
}
.trust-article h2 em {
  font-style: italic;
  font-weight: 400;
  color: var(--moss);
}

.trust-article p {
  font-family: var(--body);
  font-size: 1.02rem;
  line-height: 1.65;
  color: var(--ink-soft);
  margin: 0 0 1em;
  max-width: var(--measure);
}
.trust-article p:last-child { margin-bottom: 0; }

/* lists — moss dot bullets + dashed hairline (matches tier list in index.html) */
.trust-article ul {
  list-style: none;
  padding: 0;
  margin: 0 0 1.2em;
  max-width: var(--measure);
}
.trust-article ul li {
  padding: 0.55rem 0;
  border-top: 1px dashed color-mix(in srgb, var(--ink) 22%, transparent);
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
  color: var(--ink-soft);
  font-size: 1rem;
  line-height: 1.55;
}
.trust-article ul li:first-child {
  border-top: none;
  padding-top: 0.15rem;
}
.trust-article ul li::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--moss);
  border-radius: 50%;
  flex: 0 0 auto;
  margin-top: 0.6rem;
}

/* inline code — JetBrains Mono on an ink-wash pill */
.trust-article code,
.trust-article p code,
.trust-article li code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: color-mix(in srgb, var(--ink) 7%, transparent);
  color: var(--ink);
  padding: 0.1em 0.42em;
  border-radius: 4px;
  border: 1px solid color-mix(in srgb, var(--ink) 6%, transparent);
}

/* notice panel — used for "questions?" callouts */
.notice {
  margin: 0;
  padding: 1.1rem 1.25rem 1.15rem;
  background: color-mix(in srgb, var(--paper-deep) 80%, var(--paper));
  border-left: 3px solid var(--moss);
  border-radius: 0 6px 6px 0;
  color: var(--ink-soft);
  font-family: var(--body);
  font-size: 0.98rem;
  max-width: var(--measure);
}
.notice strong {
  display: block;
  font-family: var(--display);
  font-style: italic;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 0.3rem;
}

/* contact email block — JetBrains Mono email pill */
.contact-email {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.95rem;
  color: var(--moss);
  background: color-mix(in srgb, var(--moss) 8%, var(--paper));
  border: 1px solid color-mix(in srgb, var(--moss) 25%, transparent);
  padding: 0.3rem 0.65rem;
  border-radius: 6px;
  background-image: none;
}
.contact-email:hover, .contact-email:focus-visible {
  color: var(--moss-bright);
  border-color: var(--moss-bright);
  background-image: none;
  background-size: auto;
}

/* small "last updated" caption at the end of the article */
.updated {
  margin-top: clamp(2.5rem, 5vw, 3.5rem);
  font-family: var(--display);
  font-style: italic;
  font-size: 0.92rem;
  color: var(--sage);
  letter-spacing: 0.04em;
}

/* vine ornament before footer (lifted from index.html hero) */
.vine {
  margin-top: clamp(3.5rem, 7vw, 5rem);
  display: flex;
  justify-content: center;
  color: color-mix(in srgb, var(--moss) 55%, transparent);
}

/* ───────────────────────────── footer ───────────────────────────── */

.site-footer {
  background: var(--ink);
  color: color-mix(in srgb, var(--paper) 80%, transparent);
  padding-block: 3.5rem 2.5rem;
}
.site-footer a { color: color-mix(in srgb, var(--paper) 86%, transparent); }
.site-footer a:hover, .site-footer a:focus-visible { color: var(--paper); }
.site-footer .wrap {
  display: grid;
  grid-template-columns: 1.5fr 0.9fr 0.9fr 1fr 1.2fr;
  gap: 2rem;
  align-items: start;
}
@media (max-width: 960px) {
  .site-footer .wrap { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .site-footer .wrap { grid-template-columns: 1fr; }
}
.site-footer .colophon .wordmark {
  color: color-mix(in srgb, var(--paper) 90%, transparent);
}
.site-footer .colophon p {
  font-family: var(--display);
  font-style: italic;
  font-size: 1.1rem;
  color: color-mix(in srgb, var(--paper) 70%, transparent);
  margin: 0.6rem 0 0;
  max-width: 24ch;
}
.site-footer h4 {
  font-family: var(--body);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--paper) 55%, transparent);
  margin: 0 0 1rem;
  font-weight: 500;
}
.site-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.5rem;
  font-size: 0.95rem;
}
.site-footer .meta {
  grid-column: 1 / -1;
  padding-top: 2rem;
  margin-top: 1.5rem;
  border-top: 1px solid color-mix(in srgb, var(--paper) 12%, transparent);
  font-size: 0.82rem;
  color: color-mix(in srgb, var(--paper) 45%, transparent);
  letter-spacing: 0.02em;
}

/* sr-only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}