/* graphite.chat — single stylesheet, tokens lifted from the previous site. No JS, no external fonts. */
:root {
  --bg: #05080a; --fg: #f2f6f5; --card: #0c1114; --card-2: #11181c; --border: #263138; --border-2: #3a3f45;
  --brand: #49dbea; --brand-2: #2fb5c6; --brand-fg: #031012; --muted: #9aa8ad; --ok: #34d399; --warn: #fbbf24;
  --radius: .75rem; --radius-lg: 1.1rem;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}
* { box-sizing: border-box; }
html { background: var(--bg); color-scheme: dark; scroll-behavior: smooth; scroll-padding-top: 4.5rem; }
body { margin: 0; background: var(--bg); color: var(--fg); font-family: var(--sans); font-size: 16px; line-height: 1.6;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
a { color: var(--brand); text-decoration: none; } a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }
h1, h2, h3, h4 { line-height: 1.15; letter-spacing: -.01em; margin: 0 0 .6rem; }
h1 { font-size: clamp(2rem, 5vw, 3.4rem); font-weight: 700; }
h2 { font-size: clamp(1.5rem, 3.2vw, 2.25rem); font-weight: 700; }
h3 { font-size: 1.15rem; font-weight: 600; }
p { margin: 0 0 1rem; }
.wrap { width: min(1120px, 100% - 2rem); margin: 0 auto; }
.narrow { width: min(760px, 100% - 2rem); }
.muted { color: var(--muted); } .small { font-size: .875rem; }
.eyebrow { font-size: .72rem; letter-spacing: .16em; text-transform: uppercase; color: var(--brand); font-weight: 600; margin-bottom: .75rem; }
.lede { font-size: 1.15rem; color: var(--muted); max-width: 60ch; }
.skip { position: absolute; left: -999px; top: 0; background: var(--brand); color: var(--brand-fg); padding: .5rem 1rem; }
.skip:focus { left: 1rem; top: 1rem; z-index: 100; }

/* header / footer */
.site-header { position: sticky; top: 0; z-index: 50; backdrop-filter: blur(12px); background: rgba(5, 8, 10, .8); border-bottom: 1px solid var(--border); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 4rem; gap: 1rem; }
.nav nav { display: flex; align-items: center; gap: 1.25rem; flex-wrap: wrap; justify-content: flex-end; }
.nav nav a { color: var(--fg); font-size: .95rem; } .nav nav a:hover { color: var(--brand); text-decoration: none; }
.brand { display: inline-flex; align-items: center; gap: .55rem; font-weight: 700; font-size: 1.1rem; color: var(--fg); }
.brand-mark { display: inline-grid; place-items: center; width: 1.75rem; height: 1.75rem; border-radius: .5rem;
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-2) 100%); color: var(--brand-fg); font-weight: 800; font-size: .95rem; }
.site-footer { border-top: 1px solid var(--border); padding: 3rem 0 2rem; margin-top: 4rem; background: var(--card); }
.foot-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2rem; }
.foot-grid h3 { font-size: .8rem; font-weight: 600; text-transform: uppercase; letter-spacing: .12em; color: var(--muted); margin-bottom: .8rem; }
.foot-grid a { display: block; color: var(--fg); margin: .35rem 0; font-size: .95rem; }
.foot-grid .brand { margin-bottom: .75rem; }
.copyright { margin-top: 2.5rem; border-top: 1px solid var(--border); padding-top: 1.25rem; }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .5rem; padding: .8rem 1.25rem; border-radius: var(--radius);
  font-weight: 600; font-size: .95rem; border: 1px solid transparent; white-space: nowrap; }
.btn:hover { text-decoration: none; }
.btn-primary { background: linear-gradient(135deg, var(--brand) 0%, var(--brand-2) 100%); color: var(--brand-fg); }
.btn-primary:hover { filter: brightness(1.07); }
.btn-ghost { background: transparent; color: var(--fg); border-color: var(--border-2); } .btn-ghost:hover { border-color: var(--brand); color: var(--brand); }
.btn-sm { padding: .5rem .9rem; font-size: .875rem; }
.btn-row { display: flex; gap: .75rem; flex-wrap: wrap; }

/* sections */
.section { padding: 5rem 0; border-top: 1px solid var(--border); }
.section-head { max-width: 62ch; margin-bottom: 2.5rem; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.5rem; }
.card h3 { margin-bottom: .4rem; } .card p { margin: 0; color: var(--muted); }
.tag { display: inline-block; font-size: .7rem; letter-spacing: .1em; text-transform: uppercase; color: var(--brand); border: 1px solid rgba(73, 219, 234, .35);
  border-radius: 999px; padding: .2rem .6rem; margin: .5rem .4rem 0 0; }
.tick-list { list-style: none; padding: 0; margin: 1.25rem 0; display: grid; gap: .6rem; }
.tick-list li { padding-left: 1.6rem; position: relative; }
.tick-list li::before { content: ""; position: absolute; left: 0; top: .55em; width: .8rem; height: .45rem; border-left: 2px solid var(--brand); border-bottom: 2px solid var(--brand); transform: rotate(-45deg); }
.kv { width: 100%; border-collapse: collapse; font-size: .95rem; }
.kv th, .kv td { text-align: left; padding: .75rem .5rem; border-bottom: 1px solid var(--border); vertical-align: top; }
.kv th { color: var(--muted); font-weight: 500; width: 38%; }
.kv code, .mono { font-family: var(--mono); font-size: .9em; }

/* hero */
.hero { padding: 5rem 0 4rem; position: relative; overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: -20% -10% auto -10%; height: 70%; pointer-events: none;
  background: radial-gradient(ellipse at 30% 0%, rgba(73, 219, 234, .18), transparent 60%); }
.hero .wrap { position: relative; }
.hero-compact { padding: 4rem 0 2rem; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 3rem; align-items: center; }
.hero .lede { margin: 1rem 0 1.75rem; }
.hero-note { color: var(--muted); font-size: .875rem; margin-top: 1rem; }
.badge { display: inline-flex; align-items: center; gap: .5rem; border: 1px solid var(--border); border-radius: 999px; padding: .35rem .9rem;
  font-size: .8rem; color: var(--muted); background: var(--card); margin-top: 1.25rem; }
.badge .dot { width: .5rem; height: .5rem; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 4px rgba(52, 211, 153, .15); }
.hero-visual img { border-radius: var(--radius-lg); border: 1px solid var(--border); }

/* mocks */
.mock { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; font-size: .85rem; box-shadow: 0 30px 80px rgba(0, 0, 0, .45); }
.mock-bar { display: flex; justify-content: space-between; align-items: center; padding: .7rem 1rem; border-bottom: 1px solid var(--border); background: var(--card-2);
  font-size: .7rem; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.mock-bar .tor { color: var(--brand); }
.chat { display: grid; grid-template-columns: 1fr 1.4fr; min-height: 300px; }
.chat-list { border-right: 1px solid var(--border); }
.chat-row { display: grid; grid-template-columns: 2rem 1fr auto; gap: .6rem; align-items: center; padding: .65rem .9rem; border-bottom: 1px solid var(--border); }
.chat-row.active { background: rgba(73, 219, 234, .07); }
.avatar { width: 2rem; height: 2rem; border-radius: 50%; display: grid; place-items: center; background: var(--card-2); border: 1px solid var(--border); font-weight: 700; font-size: .8rem; color: var(--brand); }
.chat-row .who { font-weight: 600; } .chat-row .what, .chat-row .when { color: var(--muted); font-size: .78rem; }
.chat-pane { display: flex; flex-direction: column; }
.chat-head { padding: .7rem .9rem; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; font-weight: 600; }
.chat-head .ok { color: var(--ok); font-size: .75rem; font-weight: 500; }
.bubbles { padding: .9rem; display: grid; gap: .5rem; flex: 1; }
.day { text-align: center; font-size: .65rem; letter-spacing: .14em; color: var(--muted); text-transform: uppercase; }
.bubble { max-width: 78%; padding: .5rem .8rem; border-radius: .9rem; background: var(--card-2); border: 1px solid var(--border); }
.bubble.me { justify-self: end; background: rgba(73, 219, 234, .14); border-color: rgba(73, 219, 234, .35); }
.status { justify-self: end; font-size: .68rem; color: var(--muted); }
.compose { margin: 0 .9rem .9rem; padding: .6rem .9rem; border: 1px solid var(--border); border-radius: 999px; color: var(--muted); }

.words { display: grid; grid-template-columns: repeat(4, 1fr); gap: .5rem; padding: 1rem; }
.word { background: var(--card-2); border: 1px solid var(--border); border-radius: .5rem; padding: .45rem .6rem; font-family: var(--mono); font-size: .8rem; color: var(--muted); }
.word b { color: var(--brand); font-weight: 600; margin-right: .4rem; }
.mock-note { padding: .9rem 1rem; border-top: 1px solid var(--border); color: var(--muted); font-size: .85rem; }
.mock-note strong { color: var(--fg); }
.fingerprint { font-family: var(--mono); font-size: 1.1rem; letter-spacing: .12em; color: var(--fg); }

.path { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; position: relative; }
.node { padding: 1.25rem 1rem; border: 1px solid var(--border); background: var(--card); position: relative; }
.node:first-child { border-radius: var(--radius-lg) 0 0 var(--radius-lg); } .node:last-child { border-radius: 0 var(--radius-lg) var(--radius-lg) 0; }
.node + .node { border-left: 0; }
.node .lbl { font-size: .65rem; letter-spacing: .14em; text-transform: uppercase; margin-bottom: .5rem; }
.node .lbl.plain { color: var(--warn); } .node .lbl.sealed { color: var(--brand); }
.node h3 { font-size: 1rem; } .node p { font-size: .85rem; color: var(--muted); margin: 0; }
.node::after { content: "→"; position: absolute; right: -.55rem; top: 50%; transform: translateY(-50%); color: var(--brand); background: var(--bg); border-radius: 50%; z-index: 1; font-size: .9rem; }
.node:last-child::after { content: none; }
.legend { display: flex; gap: 1.5rem; flex-wrap: wrap; margin-top: 1rem; font-size: .85rem; color: var(--muted); }
.legend span::before { content: ""; display: inline-block; width: .6rem; height: .6rem; border-radius: 2px; margin-right: .45rem; vertical-align: middle; }
.legend .l-plain::before { background: var(--warn); } .legend .l-sealed::before { background: var(--brand); }

.safety { display: grid; grid-template-columns: 1fr auto 1fr; gap: 1rem; align-items: center; }
.device { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.1rem; }
.device .lbl { font-size: .65rem; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.digits { display: grid; grid-template-columns: repeat(3, 1fr); gap: .4rem .8rem; font-family: var(--mono); font-size: 1.05rem; margin: .8rem 0; letter-spacing: .08em; }
.match { text-align: center; font-size: .7rem; letter-spacing: .16em; text-transform: uppercase; color: var(--ok); font-weight: 700;
  border: 1px solid rgba(52, 211, 153, .4); border-radius: 999px; padding: .4rem .8rem; background: rgba(52, 211, 153, .08); }

/* download */
.dl-card { display: flex; flex-direction: column; gap: .75rem; }
.dl-card .btn { align-self: flex-start; }
.hash { font-family: var(--mono); font-size: .72rem; color: var(--muted); word-break: break-all; background: var(--card-2); border: 1px solid var(--border);
  border-radius: .5rem; padding: .6rem .75rem; margin: 0; }
.hash b { color: var(--fg); font-weight: 600; font-family: var(--sans); font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; display: block; margin-bottom: .3rem; }
.onion-box { margin-top: 2rem; }
.callout { border-left: 3px solid var(--brand); background: var(--card); padding: 1rem 1.25rem; border-radius: 0 var(--radius) var(--radius) 0; color: var(--muted); }
.callout strong { color: var(--fg); }

/* faq */
.faq-list { max-width: 760px; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius); background: var(--card); margin-bottom: .6rem; padding: 0 1.25rem; }
.faq-item summary { cursor: pointer; padding: 1rem 0; font-weight: 600; list-style: none; position: relative; padding-right: 2rem; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: .25rem; top: .85rem; color: var(--brand); font-size: 1.2rem; }
.faq-item[open] summary::after { content: "–"; }
.faq-item p { color: var(--muted); padding-bottom: 1rem; margin: 0; }

/* cta */
.cta { padding: 4rem 0 0; }
.cta-inner { text-align: center; border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 3rem 1.5rem;
  background: radial-gradient(ellipse at 50% 0%, rgba(73, 219, 234, .14), var(--card) 65%); }
.cta .btn-row { justify-content: center; margin: 1.25rem 0 .75rem; }

/* blog */
.crumbs { font-size: .85rem; color: var(--muted); margin: 2.5rem 0 1.5rem; } .crumbs a { color: var(--muted); } .crumbs a:hover { color: var(--brand); }
.post h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
.post .meta { color: var(--muted); font-size: .875rem; margin-bottom: 2.5rem; padding-bottom: 1.5rem; border-bottom: 1px solid var(--border); }
.prose { font-size: 1.05rem; line-height: 1.75; }
.prose h2 { font-size: 1.6rem; margin: 2.5rem 0 .9rem; } .prose h3 { font-size: 1.2rem; margin: 2rem 0 .6rem; }
.prose p, .prose ul, .prose ol { margin-bottom: 1.15rem; } .prose li { margin: .35rem 0; }
.prose ul, .prose ol { padding-left: 1.4rem; }
.prose a { text-decoration: underline; text-decoration-color: rgba(73, 219, 234, .4); } .prose a:hover { text-decoration-color: var(--brand); }
.prose blockquote { border-left: 3px solid var(--brand); margin: 1.5rem 0; padding: .25rem 1.25rem; color: var(--muted); }
.prose table { width: 100%; border-collapse: collapse; font-size: .95rem; margin: 1.5rem 0; display: block; overflow-x: auto; }
.prose th, .prose td { text-align: left; padding: .65rem .6rem; border-bottom: 1px solid var(--border); vertical-align: top; }
.prose th { color: var(--muted); font-weight: 600; }
.prose code { font-family: var(--mono); font-size: .9em; background: var(--card-2); border: 1px solid var(--border); border-radius: .35rem; padding: .1rem .35rem; }
.prose pre { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem; overflow-x: auto; }
.prose pre code { border: 0; background: transparent; padding: 0; }
.prose strong { color: var(--fg); }
.prose hr { border: 0; border-top: 1px solid var(--border); margin: 2rem 0; }
.further { margin: 3rem 0 0; padding: 1.5rem; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg); }
.further h2 { font-size: 1rem; text-transform: uppercase; letter-spacing: .12em; color: var(--muted); margin-bottom: .75rem; }
.further ul { margin: 0; padding-left: 1.2rem; } .further li { margin: .4rem 0; }
.featured { display: block; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 2rem; margin-bottom: 1.5rem; color: var(--fg);
  background-image: radial-gradient(ellipse at 100% 0%, rgba(73, 219, 234, .14), transparent 55%); }
.featured:hover { text-decoration: none; border-color: var(--brand); }
.featured h2 { margin: .25rem 0 .75rem; } .featured p { color: var(--muted); margin: 0 0 .5rem; }
.post-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.post-card { display: flex; flex-direction: column; gap: .4rem; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.4rem; color: var(--fg); }
.post-card:hover { text-decoration: none; border-color: var(--brand); }
.post-card h3 { font-size: 1.05rem; margin: 0; } .post-card p { color: var(--muted); font-size: .9rem; margin: 0; flex: 1; }
.post-card .meta, .featured .meta { font-size: .8rem; }

/* responsive */
@media (max-width: 960px) {
  .hero-grid, .two-col { grid-template-columns: 1fr; gap: 2rem; }
  .grid-3, .post-grid { grid-template-columns: repeat(2, 1fr); }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .path { grid-template-columns: 1fr 1fr; }
  .node:first-child { border-radius: var(--radius-lg) 0 0 0; } .node:nth-child(2) { border-radius: 0 var(--radius-lg) 0 0; }
  .node:nth-child(3) { border-radius: 0 0 0 var(--radius-lg); border-left: 1px solid var(--border); border-top: 0; } .node:last-child { border-radius: 0 0 var(--radius-lg) 0; border-top: 0; }
  .node:nth-child(2)::after { content: none; }
}
@media (max-width: 640px) {
  .nav { height: auto; padding: .75rem 0; flex-wrap: wrap; } .nav nav { gap: .85rem; font-size: .9rem; }
  .grid-3, .grid-2, .post-grid, .foot-grid, .safety, .path, .chat { grid-template-columns: 1fr; }
  .chat-list { border-right: 0; border-bottom: 1px solid var(--border); }
  .node, .node + .node { border: 1px solid var(--border); border-radius: var(--radius) !important; margin-bottom: .5rem; } .node::after { content: none; }
  .section { padding: 3.5rem 0; } .hero { padding: 3.5rem 0 2.5rem; }
  .words { grid-template-columns: repeat(3, 1fr); }
  .match { justify-self: center; }
}

/* migration notice (no-JS dismiss via the checkbox hack) */
.notice-toggle { position: absolute; left: -9999px; }
.notice { background: rgba(73, 219, 234, .10); border-bottom: 1px solid var(--border); font-size: .92rem; }
.notice-inner { display: flex; align-items: flex-start; gap: 1rem; padding: .75rem 0; }
.notice p { margin: 0; flex: 1; }
.notice-close { cursor: pointer; font-size: 1.4rem; line-height: 1; color: var(--muted); padding: 0 .25rem; border-radius: .35rem; }
.notice-close:hover, .notice-close:focus { color: var(--fg); outline: 2px solid var(--brand); }
.notice-toggle:checked + .notice { display: none; }
/* privacy notice page */
.doc h2 { margin-top: 2.5rem; font-size: 1.5rem; } .doc h3 { margin-top: 1.75rem; } .doc p, .doc li { color: var(--fg); } .doc ul { padding-left: 1.3rem; }
.doc li { margin: .4rem 0; } .doc .updated { color: var(--muted); font-size: .875rem; }
.doc code { font-family: var(--mono); font-size: .9em; }

.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; }
.card h2.card-h { font-size: 1.15rem; font-weight: 600; margin-bottom: .4rem; letter-spacing: 0; }