/* Rotorloop site — "Field Manual with live samples". Tokens first; a re-skin should mostly touch this block. */
:root {
  --ink: #12161C;
  --ink-2: #3A414C;
  --muted: #545D6B;
  --rule: #D5D9E0;
  --rule-2: #E6E9EE;
  --paper: #F4F5F7;
  --white: #FFFFFF;
  --blue: #2457D6;
  --blue-dark: #1A3FA0;
  --blue-tint: #E7EEFC;
  --cool: #4C8DFF;
  --warm: #FF7A3D;
  --ok: #1F6B3F; --ok-bg: #E3F1E8;
  --next: #8A5A00; --next-bg: #FFF1D1;
  --plan: #3A414C; --plan-bg: #EEF0F3;
  --r: 4px;
  --max: 1160px;
  --read: 68ch;
  --head: 'Space Grotesk', 'Segoe UI', system-ui, sans-serif;
  --body: Inter, 'Segoe UI', system-ui, sans-serif;
  --mono: 'IBM Plex Mono', Consolas, ui-monospace, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.6 var(--body); }
img, svg { max-width: 100%; }
a { color: var(--blue); text-underline-offset: 3px; }
a:hover { color: var(--blue-dark); }
:focus-visible { outline: 3px solid #9DB8F5; outline-offset: 2px; }
h1, h2, h3 { font-family: var(--head); font-weight: 600; line-height: 1.15; margin: 0 0 .5em; letter-spacing: -0.01em; }
h1 { font-size: clamp(34px, 5vw, 52px); }
h2 { font-size: clamp(26px, 3.2vw, 34px); }
h3 { font-size: 19px; }
p { margin: 0 0 1em; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 12px; background: var(--white); padding: 8px 12px; z-index: 10; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* ---------- header ---------- */
.site-head { background: var(--white); border-bottom: 1px solid var(--rule); position: sticky; top: 0; z-index: 5; }
.site-head .wrap { display: flex; align-items: center; gap: 24px; min-height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 8px; color: var(--ink); text-decoration: none; font: 600 22px/1 var(--head); letter-spacing: -0.02em; }
.brand svg { width: 28px; height: 28px; flex: none; }
.nav { display: flex; align-items: center; gap: 22px; margin-left: auto; }
.nav a { color: var(--ink-2); text-decoration: none; font-weight: 500; font-size: 15px; padding: 10px 0; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); text-decoration: underline; text-decoration-thickness: 2px; }
.menu-btn { display: none; margin-left: auto; min-height: 44px; padding: 0 14px; border: 1px solid var(--rule); background: var(--white); border-radius: var(--r); font: 500 15px var(--body); color: var(--ink); }

.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 0 18px; border-radius: var(--r); font: 600 15px var(--body); text-decoration: none; border: 1px solid var(--blue); background: var(--blue); color: var(--white); cursor: pointer; }
.btn:hover { background: var(--blue-dark); border-color: var(--blue-dark); color: var(--white); }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn.ghost:hover { background: var(--ink); color: var(--white); }
.nav .btn { padding: 0 14px; min-height: 40px; color: var(--white); text-decoration: none; }

/* ---------- document structure ---------- */
.label { font: 500 12px/1.4 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.section { border-top: 1px solid var(--rule); padding: 64px 0; }
.section.white { background: var(--white); }
.sec-head { display: grid; grid-template-columns: 140px minmax(0, 1fr); gap: 24px; margin-bottom: 32px; }
.sec-head .label { padding-top: 10px; }
.sec-head p { color: var(--ink-2); max-width: var(--read); }
.lede { font-size: 19px; color: var(--ink-2); max-width: 58ch; }
.prose { max-width: var(--read); }
.prose h2 { margin-top: 1.6em; }
.prose h3 { margin-top: 1.4em; }
.prose ul { padding-left: 1.2em; }
.prose li { margin-bottom: .4em; }

/* ---------- hero ---------- */
.hero { padding: 56px 0 64px; }
.hero .wrap { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 520px); gap: 48px; align-items: center; }
.hero .actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.hero .status-line { margin-top: 20px; font-size: 14px; color: var(--muted); }

/* ---------- product sample (real UI pieces) ---------- */
.sample { background: var(--white); border: 1px solid var(--rule); border-radius: 6px; box-shadow: 0 1px 0 var(--rule), 0 12px 28px rgba(18, 22, 28, .08); overflow: hidden; }
.sample-bar { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 10px 14px; background: var(--ink); color: #fff; font-size: 13px; }
.sample-bar .live { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; font-size: 12px; color: #9FE0B5; }
.sample-bar .live::before { content: ''; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.sample-body { display: grid; grid-template-columns: minmax(0, 1fr) 210px; }
.rooms { list-style: none; margin: 0; padding: 0; border-right: 1px solid var(--rule-2); }
.rooms li { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 10px 14px; border-bottom: 1px solid var(--rule-2); font-size: 14px; }
.rooms li:last-child { border-bottom: 0; }
.rooms small { display: block; color: var(--muted); font-size: 12px; }
.t { font: 600 16px/1 var(--head); padding: 6px 8px; border-radius: 3px; min-width: 54px; text-align: center; border: 1px solid transparent; }
.t.vc { background: #2F5FC4; color: #fff; } .t.c { background: #7FA3EC; color: #0B2A6B; } .t.bc { background: #D3E0FA; }
.t.ok { background: #fff; border-color: var(--rule); } .t.bw { background: #FCE1CC; } .t.w { background: #F4A675; color: #3B1505; } .t.vh { background: #B8401A; color: #fff; }
.dial-box { background: var(--ink); color: #fff; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 14px 10px; gap: 6px; }
.dial { position: relative; width: 170px; height: 164px; }
.dial svg { width: 170px; height: 170px; display: block; touch-action: none; cursor: grab; }
.dial-txt { position: absolute; inset: 46px 0 auto; text-align: center; pointer-events: none; }
.dial-txt .verb { font: 600 10px var(--mono); letter-spacing: .12em; color: #9AA3B2; }
.dial-txt .big { font: 600 42px/1 var(--head); }
.dial-txt .now { font-size: 12px; color: #C9CED6; }
.dial-hint { font-size: 12px; color: #9AA3B2; }
.sample-note { font-size: 12px; color: var(--muted); margin-top: 8px; }
.scale { display: flex; height: 10px; border-radius: 2px; overflow: hidden; border: 1px solid var(--rule); max-width: 420px; }
.scale span { flex: 1; }
.scale-labels { display: flex; justify-content: space-between; max-width: 420px; font-size: 12px; color: var(--muted); margin-top: 4px; }

/* ---------- flow diagram ---------- */
.flow { display: grid; grid-template-columns: repeat(5, minmax(0, auto)); align-items: stretch; gap: 0; }
.node { background: var(--white); border: 1px solid var(--ink); border-radius: var(--r); padding: 18px; min-width: 0; }
.node .label { display: block; margin-bottom: 6px; }
.node h3 { margin-bottom: 6px; }
.node p { font-size: 14px; color: var(--ink-2); margin: 0; }
.node ul { margin: 8px 0 0; padding-left: 1.1em; font-size: 14px; color: var(--ink-2); }
.link { display: flex; flex-direction: column; justify-content: center; align-items: center; padding: 0 10px; min-width: 96px; font: 500 11px/1.3 var(--mono); color: var(--muted); text-align: center; }
.link::before { content: ''; display: block; width: 100%; height: 0; border-top: 2px solid var(--ink); margin-bottom: 8px; }
.site-box { border-style: dashed; }

/* ---------- spec tables ---------- */
.spec { width: 100%; border-collapse: collapse; background: var(--white); border: 1px solid var(--rule); font-size: 15px; }
.spec caption { text-align: left; padding-bottom: 10px; }
.spec th, .spec td { text-align: left; vertical-align: top; padding: 12px 14px; border-bottom: 1px solid var(--rule-2); }
.spec thead th { font: 500 12px var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); background: var(--paper); border-bottom: 1px solid var(--rule); }
.spec tbody th { font-weight: 600; width: 32%; }
.table-box { overflow-x: auto; }
.tag { display: inline-block; font: 600 12px/1 var(--mono); letter-spacing: .04em; padding: 5px 7px; border-radius: 2px; border: 1px solid; white-space: nowrap; }
.tag.now { color: var(--ok); background: var(--ok-bg); border-color: #B7DCC4; }
.tag.next { color: var(--next); background: var(--next-bg); border-color: #F0D58F; }
.tag.plan { color: var(--plan); background: var(--plan-bg); border-color: var(--rule); }

/* ---------- numbered list of rules ---------- */
.rules { list-style: none; margin: 0; padding: 0; counter-reset: r; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--rule); }
.rules li { counter-increment: r; padding: 20px 24px 20px 0; border-bottom: 1px solid var(--rule); display: grid; grid-template-columns: 44px minmax(0, 1fr); gap: 4px 12px; align-content: start; }
.rules li:nth-child(odd) { border-right: 1px solid var(--rule); }
.rules li:nth-child(even) { padding-left: 24px; }
.rules li::before { content: counter(r, decimal-leading-zero); font: 500 13px var(--mono); color: var(--blue); padding-top: 3px; grid-row: span 2; }
.rules strong { font-family: var(--head); font-size: 17px; font-weight: 600; }
.rules span { color: var(--ink-2); font-size: 15px; }

/* ---------- callout / CTA band ---------- */
.band { background: var(--ink); color: #fff; padding: 48px 0; }
.band .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 20px; }
.band h2 { margin: 0; }
.band p { margin: 6px 0 0; color: #C9CED6; }
.band .btn.ghost { color: #fff; border-color: #fff; }
.band .btn.ghost:hover { background: #fff; color: var(--ink); }

.draft { border: 1px solid #F0D58F; background: var(--next-bg); color: var(--next); padding: 12px 14px; border-radius: var(--r); font-size: 14px; margin-bottom: 24px; }
.ph { background: #FFF1D1; padding: 0 3px; font-family: var(--mono); font-size: .92em; }

/* ---------- form ---------- */
.form { background: var(--white); border: 1px solid var(--rule); border-radius: 6px; padding: 24px; display: grid; gap: 16px; max-width: 640px; }
.field { display: grid; gap: 6px; }
.field label { font-weight: 600; font-size: 15px; }
.field .hint { font-size: 13px; color: var(--muted); }
.field input, .field select, .field textarea { font: 16px var(--body); min-height: 46px; padding: 10px 12px; border: 1px solid #9AA3B2; border-radius: var(--r); background: #fff; color: var(--ink); width: 100%; }
.field textarea { min-height: 110px; resize: vertical; }
.field input[aria-invalid="true"], .field select[aria-invalid="true"] { border-color: #B42318; }
.field .err { color: #B42318; font-size: 13px; min-height: 0; }
.row2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: var(--ink-2); }
.check input { width: 20px; height: 20px; margin-top: 2px; flex: none; }
.form-status { border-radius: var(--r); padding: 12px 14px; font-size: 15px; }
.form-status.ok { background: var(--ok-bg); color: var(--ok); border: 1px solid #B7DCC4; }
.form-status.bad { background: #FDE7E5; color: #B42318; border: 1px solid #F5C2BD; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* ---------- footer ---------- */
.site-foot { border-top: 1px solid var(--rule); background: var(--white); padding: 32px 0 28px; font-size: 14px; color: var(--muted); }
.site-foot .top { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 20px; padding-bottom: 20px; border-bottom: 1px solid var(--rule-2); }
.site-foot nav { display: flex; flex-wrap: wrap; gap: 6px 20px; }
.site-foot nav a { color: var(--ink-2); text-decoration: none; }
.site-foot nav a:hover { text-decoration: underline; }
.site-foot .bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px; padding-top: 16px; }
.site-foot .credit a { color: var(--ink-2); }

/* ---------- 404 ---------- */
.notfound { padding: 96px 0; }

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  .hero .wrap { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .link { flex-direction: row; min-height: 52px; padding: 0; gap: 10px; }
  .link::before { width: 0; height: 28px; border-top: 0; border-left: 2px solid var(--ink); margin: 0; }
}
@media (max-width: 820px) {
  .nav { display: none; position: absolute; left: 0; right: 0; top: 64px; background: var(--white); border-bottom: 1px solid var(--rule); flex-direction: column; align-items: stretch; gap: 0; padding: 8px 20px 16px; }
  .nav.open { display: flex; }
  .nav a { padding: 12px 0; border-bottom: 1px solid var(--rule-2); }
  .nav .btn { margin-top: 12px; }
  .menu-btn { display: inline-flex; align-items: center; }
  .sec-head { grid-template-columns: 1fr; gap: 4px; }
  .sec-head .label { padding-top: 0; }
  .rules { grid-template-columns: 1fr; }
  .rules li:nth-child(odd) { border-right: 0; }
  .rules li:nth-child(even) { padding-left: 0; }
  .row2 { grid-template-columns: 1fr; }
  .section { padding: 48px 0; }
}
@media (max-width: 560px) {
  .sample-body { grid-template-columns: 1fr; }
  .rooms { border-right: 0; border-bottom: 1px solid var(--rule-2); }
  .spec thead { display: none; }
  .spec, .spec tbody, .spec tr, .spec th, .spec td { display: block; width: 100%; }
  .spec tr { border-bottom: 1px solid var(--rule); padding: 8px 0; }
  .spec th, .spec td { border: 0; padding: 4px 14px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; scroll-behavior: auto !important; } }

/* ---------- docs ---------- */
.docs { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 48px; padding-top: 40px; padding-bottom: 72px; align-items: start; }
.toc { position: sticky; top: 88px; font-size: 15px; }
.toc summary { display: none; }
.toc .label { margin: 18px 0 6px; }
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc li a, .toc-home a { display: block; padding: 5px 0 5px 12px; border-left: 2px solid var(--rule); color: var(--ink-2); text-decoration: none; }
.toc-home { margin: 0; }
.toc a:hover { color: var(--ink); border-left-color: var(--ink-2); }
.toc a[aria-current="page"] { color: var(--ink); font-weight: 600; border-left-color: var(--blue); }
.doc { min-width: 0; }
.doc > .label a { color: var(--muted); }
.doc h1 { font-size: clamp(32px, 4vw, 44px); }
.doc .rules { margin: 8px 0 24px; }
.doc .rules li { margin: 0; }
.doc pre { background: var(--ink); color: #E6E9EE; padding: 16px 18px; border-radius: var(--r); overflow-x: auto; font: 13px/1.6 var(--mono); }
.doc code { font: .9em var(--mono); }
.doc :not(pre) > code { background: var(--rule-2); padding: 1px 5px; border-radius: 3px; }
.doc .table-box { margin: 8px 0 20px; }
.doc .spec tbody th { width: 30%; }
.note { border-left: 3px solid #F0D58F; background: var(--next-bg); padding: 10px 14px; font-size: 15px; color: var(--ink-2); }
.reviewed { font-size: 13px; color: var(--muted); margin-top: 40px; border-top: 1px solid var(--rule); padding-top: 12px; }
.pager { display: flex; justify-content: space-between; gap: 16px; margin-top: 16px; }
.pager a { display: block; flex: 1; max-width: 48%; border: 1px solid var(--rule); background: var(--white); border-radius: var(--r); padding: 12px 14px; text-decoration: none; color: var(--ink); font-weight: 600; }
.pager a:hover { border-color: var(--ink); }
.pager a .label { display: block; }
.pager .nx { text-align: right; margin-left: auto; }
.doc-index { display: grid; gap: 8px; margin-top: 24px; }
.doc-index section { border-top: 1px solid var(--rule); padding-top: 8px; }
.doc-index ul { list-style: none; margin: 0 0 16px; padding: 0; }
.doc-index li { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 16px; padding: 10px 0; border-bottom: 1px solid var(--rule-2); }
.doc-index li a { font-weight: 600; }
.doc-index li span { color: var(--ink-2); font-size: 15px; }

/* ---------- integrations matrix ---------- */
.tag.gw { color: var(--blue-dark); background: var(--blue-tint); border-color: #BFD0F5; }
.legend { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px 24px; margin-top: 24px; max-width: 860px; font-size: 14px; color: var(--ink-2); }
.legend p { margin: 0; display: flex; gap: 10px; align-items: baseline; }
.legend .tag { flex: none; min-width: 132px; text-align: center; }
.filter { max-width: 420px; margin-top: 28px; }
[data-matrix] tr[hidden] { display: none; }

@media (max-width: 820px) {
  .docs { grid-template-columns: 1fr; gap: 16px; padding-top: 20px; }
  .toc { position: static; border: 1px solid var(--rule); border-radius: var(--r); background: var(--white); padding: 0 14px; }
  .toc summary { display: block; cursor: pointer; padding: 12px 0; font-weight: 600; min-height: 44px; }
  .toc nav { padding-bottom: 12px; }
  .doc-index li { grid-template-columns: 1fr; gap: 2px; }
  .legend { grid-template-columns: 1fr; }
  .pager { flex-direction: column; }
  .pager a { max-width: none; }
  .pager .nx { text-align: left; margin-left: 0; }
}

/* =====================================================================
   v2 additions: header sign-in, footer columns, homepage demo, diagrams,
   product mockups, use cases, changelog. Same tokens as above.
   ===================================================================== */

/* ---------- header / footer ---------- */
.nav .signin { padding-left: 18px; border-left: 1px solid var(--rule); }
@media (max-width: 1060px) {
  .nav { display: none; position: absolute; left: 0; right: 0; top: 64px; background: var(--white); border-bottom: 1px solid var(--rule); flex-direction: column; align-items: stretch; gap: 0; padding: 8px 20px 16px; box-shadow: 0 12px 20px rgba(18, 22, 28, .06); }
  .nav.open { display: flex; }
  .nav a { padding: 12px 0; border-bottom: 1px solid var(--rule-2); }
  .nav .signin { padding-left: 0; border-left: 0; }
  .nav .btn { margin-top: 12px; }
  .menu-btn { display: inline-flex; align-items: center; }
}
.foot-cols { display: grid; grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 1fr)); gap: 24px; padding-bottom: 24px; border-bottom: 1px solid var(--rule-2); }
.foot-cols p { margin: 10px 0 0; max-width: 34ch; }
.foot-cols h2 { font: 500 12px/1.4 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin: 6px 0 10px; }
.foot-cols ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.foot-cols a { color: var(--ink-2); text-decoration: none; }
.foot-cols a:hover { text-decoration: underline; color: var(--ink); }
@media (max-width: 820px) { .foot-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); } .foot-cols > div:first-child { grid-column: 1 / -1; } }

/* ---------- homepage hero v2 ---------- */
.hero2 { padding: 56px 0 40px; }
.hero2 .intro { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 420px); gap: 48px; align-items: end; margin-bottom: 36px; }
.hero2 h1 { font-size: clamp(38px, 6vw, 68px); letter-spacing: -0.025em; margin-bottom: .3em; }
.hero2 .actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero2 .facts { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--ink); }
.hero2 .facts li { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--rule); font-size: 15px; color: var(--ink-2); }
.hero2 .facts b { font: 500 12px/1.9 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }

/* ---------- the live demo ---------- */
.demo { border-color: var(--ink); margin: 0; }
.demo .sample-bar .src { color: #9AA3B2; font: 500 11px var(--mono); letter-spacing: .06em; text-transform: uppercase; }
.demo-body { display: grid; grid-template-columns: minmax(0, 1fr) 340px; }
.demo-list { border-right: 1px solid var(--rule-2); min-width: 0; }
.demo-list .counts { padding: 10px 14px; font-size: 13px; color: var(--muted); border-bottom: 1px solid var(--rule-2); margin: 0; }
.demo-list ul { list-style: none; margin: 0; padding: 0; }
.demo-list li + li { border-top: 1px solid var(--rule-2); }
.demo-list button { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; gap: 12px; align-items: center; width: 100%; padding: 11px 14px; border: 0; background: #fff; text-align: left; font: inherit; color: var(--ink); cursor: pointer; min-height: 60px; }
.demo-list button:hover { background: #FAFBFC; }
.demo-list button[aria-pressed="true"] { background: var(--blue-tint); box-shadow: inset 3px 0 0 var(--blue); }
.demo-list b { display: block; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.demo-list small { display: block; color: var(--muted); font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chip { font: 600 11px/1 var(--body); padding: 5px 7px; border-radius: 3px; white-space: nowrap; background: var(--rule-2); color: var(--ink-2); }
.chip.hold { background: #EDE7FB; color: #4C2A9A; }
.chip.ok { background: var(--ok-bg); color: var(--ok); } .chip.warn { background: var(--next-bg); color: var(--next); } .chip.bad { background: #FDE7E5; color: #B42318; }
.demo-panel { background: var(--ink); color: #fff; padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.demo-panel .ph-title { font: 600 18px/1.2 var(--head); margin: 0; }
.demo-panel .ph-sub { font-size: 13px; color: #9AA3B2; margin: 2px 0 0; }
.demo-panel .dial { margin: 0 auto; width: 220px; height: 210px; }
.demo-panel .dial svg { width: 220px; height: 220px; }
.demo-panel .dial-txt { inset: 62px 0 auto; }
.demo-panel .dial-txt .big { font-size: 50px; }
.demo-ctl { display: grid; gap: 10px; }
.demo-ctl label { display: flex; justify-content: space-between; gap: 8px; font-size: 13px; color: #C9CED6; }
.demo-ctl label span { color: #fff; font-weight: 600; text-align: right; }
.range { -webkit-appearance: none; appearance: none; width: 100%; height: 28px; background: transparent; --fill: 43%; cursor: pointer; }
.range::-webkit-slider-runnable-track { height: 6px; border-radius: 3px; background: linear-gradient(to right, #4C8DFF var(--fill), #3A414C var(--fill)); }
.range::-moz-range-track { height: 6px; border-radius: 3px; background: #3A414C; }
.range::-moz-range-progress { height: 6px; border-radius: 3px; background: #4C8DFF; }
.range::-webkit-slider-thumb { -webkit-appearance: none; width: 24px; height: 24px; margin-top: -9px; border-radius: 50%; background: #fff; border: 4px solid #4C8DFF; }
.range::-moz-range-thumb { width: 18px; height: 18px; border-radius: 50%; background: #fff; border: 4px solid #4C8DFF; }
.demo-ctl .btn { width: 100%; }
.demo-ctl .btn:disabled { background: #262C36; border-color: #262C36; color: #9AA3B2; cursor: default; }
.demo-ctl .btn.ghost { color: #fff; border-color: #5B6472; }
.demo-ctl .btn.ghost:hover { background: #fff; color: var(--ink); }
.demo-msg { min-height: 2.6em; margin: 0; font-size: 13px; color: #9FE0B5; }
.demo-foot { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; font-size: 13px; color: var(--muted); margin-top: 10px; }
@media (max-width: 900px) {
  .hero2 .intro { grid-template-columns: 1fr; gap: 28px; }
  .demo-body { grid-template-columns: 1fr; }
  .demo-list { border-right: 0; border-bottom: 1px solid var(--rule-2); }
}
@media (max-width: 420px) {
  .demo-list .chip { display: none; }
  .hero2 .facts li { grid-template-columns: 1fr; gap: 0; }
}

/* ---------- before / after ---------- */
.ba { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 32px; }
.ba h3 { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 10px; }
.stack { display: grid; gap: 12px; }
.vscreen { border: 1px solid #B9BFC8; background: #ECEEF1; border-radius: 3px; font-size: 13px; overflow: hidden; }
.vscreen .url { display: flex; align-items: center; gap: 8px; background: #DDE1E6; padding: 6px 10px; font: 500 12px var(--mono); color: #3A414C; border-bottom: 1px solid #C6CBD2; }
.vscreen .url::before { content: ''; flex: none; width: 9px; height: 9px; border-radius: 50%; border: 1px solid #8A919C; }
.vscreen .url em { margin-left: auto; font-style: normal; color: #B42318; white-space: nowrap; }
.vscreen .scr { display: grid; grid-template-columns: 130px minmax(0, 1fr); gap: 10px; padding: 10px; align-items: center; }
.vscreen .scr b { font-weight: 600; color: #3A414C; }
.vscreen .fake { display: grid; gap: 4px; }
.vscreen .fake span { display: block; height: 22px; background: #fff; border: 1px solid #B9BFC8; font: 12px/20px var(--mono); padding: 0 6px; color: #8A919C; }
.one { background: var(--white); border: 1px solid var(--ink); border-radius: 4px; overflow: hidden; }
.one ul { list-style: none; margin: 0; padding: 0; }
.one li { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; gap: 10px; align-items: center; padding: 10px 14px; border-top: 1px solid var(--rule-2); font-size: 14px; }
.one li small { display: block; font-size: 12px; color: var(--muted); }
.one .src { font: 500 11px var(--mono); color: var(--muted); letter-spacing: .04em; }
.caption { font-size: 13px; color: var(--muted); margin-top: 10px; }
@media (max-width: 820px) { .ba { grid-template-columns: 1fr; } }
@media (max-width: 420px) { .vscreen .scr { grid-template-columns: 1fr; } .one .src { display: none; } }

/* ---------- diagram ---------- */
.diagram { background: var(--white); border: 1px solid var(--rule); border-radius: 6px; padding: 20px; }
.diagram svg { display: block; width: 100%; height: auto; }
.diagram .tall { display: none; max-width: 380px; margin: 0 auto; }
.diagram text { font-family: var(--body); fill: var(--ink); }
.diagram .mono { font-family: var(--mono); font-size: 11px; letter-spacing: .06em; fill: var(--muted); }
.diagram .h { font-family: var(--head); font-weight: 600; font-size: 17px; }
.diagram .s { font-size: 13px; fill: var(--ink-2); }
.diagram .w { fill: #fff; }
@media (max-width: 760px) { .diagram .wide { display: none; } .diagram .tall { display: block; } .diagram { padding: 12px; } }

/* ---------- capability entries ---------- */
.caps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--ink); }
.caps article { padding: 22px 22px 26px 0; border-bottom: 1px solid var(--rule); min-width: 0; }
.caps article + article { padding-left: 22px; border-left: 1px solid var(--rule); }
.caps .label { display: block; margin-bottom: 8px; color: var(--blue); }
.caps h3 { margin-bottom: 8px; }
.caps p { color: var(--ink-2); font-size: 15px; }
.caps .mini { margin-top: 14px; }
@media (max-width: 900px) {
  .caps { grid-template-columns: 1fr; }
  .caps article, .caps article + article { padding: 20px 0; border-left: 0; }
}

/* ---------- systems strip ---------- */
.sys { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 32px; }
.sys > div { display: grid; grid-template-columns: 150px minmax(0, 1fr); gap: 14px; padding: 14px 0; border-top: 1px solid var(--rule); align-items: start; }
.sys .tag { justify-self: start; }
.sys p { margin: 0; color: var(--ink-2); font-size: 15px; }
@media (max-width: 900px) { .sys { grid-template-columns: 1fr; } }
@media (max-width: 480px) { .sys > div { grid-template-columns: 1fr; gap: 6px; } }

/* ---------- status board ---------- */
.board { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.board section { background: var(--white); border: 1px solid var(--rule); border-top: 3px solid var(--ink); border-radius: 0 0 4px 4px; padding: 18px; }
.board section.now { border-top-color: var(--ok); } .board section.next { border-top-color: #D9A21B; } .board section.plan { border-top-color: var(--muted); }
.board ul { margin: 10px 0 0; padding-left: 1.1em; color: var(--ink-2); font-size: 15px; }
.board li { margin-bottom: 4px; }
@media (max-width: 900px) { .board { grid-template-columns: 1fr; } }

/* ---------- use-case index ---------- */
.uc { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--ink); }
.uc a { display: block; padding: 18px 18px 22px 0; color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--rule); }
.uc a + a { padding-left: 18px; border-left: 1px solid var(--rule); }
.uc a:hover h3 { text-decoration: underline; }
.uc .label { display: block; margin-bottom: 8px; }
.uc p { font-size: 15px; color: var(--ink-2); margin: 0; }
@media (max-width: 980px) { .uc { grid-template-columns: repeat(2, minmax(0, 1fr)); } .uc a:nth-child(3) { padding-left: 0; border-left: 0; } }
@media (max-width: 560px) { .uc { grid-template-columns: 1fr; } .uc a, .uc a + a { padding: 16px 0; border-left: 0; } }

/* ---------- inner page header ---------- */
.page-hero { padding: 56px 0 32px; }
.page-hero h1 { max-width: 20ch; }
.page-hero .lede { margin-bottom: 0; }

/* ---------- product mockups (faithful to the app's look) ---------- */
.shot { display: grid; grid-template-columns: minmax(0, 340px) minmax(0, 1fr); gap: 40px; align-items: start; padding: 48px 0; border-top: 1px solid var(--rule); scroll-margin-top: 80px; }
.shot .label { display: block; margin-bottom: 8px; }
.shot ul { padding-left: 1.1em; color: var(--ink-2); }
.shot li { margin-bottom: 6px; }
.mock { background: #F4F5F7; border: 1px solid var(--ink); border-radius: 6px; overflow: hidden; font: 14px/1.45 var(--body); min-width: 0; }
.mock-top { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 10px; padding: 8px 12px; background: var(--ink); color: #fff; font-size: 13px; }
.mock-top b { font: 600 15px var(--head); }
.mock-top .tabs { display: flex; gap: 2px; background: #262C36; border-radius: 6px; padding: 2px; margin-left: auto; }
.mock-top .tabs span { padding: 4px 10px; border-radius: 4px; color: #C9CED6; font-weight: 600; font-size: 12px; }
.mock-top .tabs .on { background: #fff; color: var(--ink); }
.mock-top .on-line { background: var(--ok-bg); color: var(--ok); font-weight: 600; font-size: 11px; padding: 3px 7px; border-radius: 4px; }
.mock-in { padding: 12px; display: grid; gap: 12px; }
.mock-2 { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 12px; align-items: start; }
.mpanel { background: #fff; border: 1px solid var(--rule); border-radius: 6px; padding: 12px; min-width: 0; }
.mpanel h4 { font: 600 16px var(--head); margin: 0; }
.mpanel .sub { font-size: 12px; color: var(--muted); margin: 0 0 10px; }
.mpanel h5 { font: 600 13px var(--head); margin: 14px 0 0; }
.mlist { background: #fff; border: 1px solid var(--rule); border-radius: 6px; overflow: hidden; min-width: 0; }
.mrow { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; gap: 10px; align-items: center; padding: 9px 12px; border-top: 1px solid var(--rule-2); }
.mrow:first-child { border-top: 0; }
.mrow.sel { background: var(--blue-tint); box-shadow: inset 3px 0 0 var(--blue); }
.mrow b { display: block; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mrow small { display: block; font-size: 11px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mrow .t { font-size: 14px; min-width: 48px; padding: 5px 6px; }
.mcounts { font-size: 12px; color: var(--muted); margin: -4px 0 0; }
.mpc { border: 1px solid var(--rule); border-radius: 6px; padding: 10px; display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; align-items: center; margin-top: 8px; }
.mpc .pn { font-weight: 600; } .mpc .pv { font-size: 12px; color: var(--muted); }
.mpc .act { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.mb { display: inline-flex; align-items: center; justify-content: center; min-height: 34px; padding: 0 12px; border: 1px solid var(--rule); border-radius: 6px; background: #fff; font-weight: 500; font-size: 13px; }
.mb.on { background: var(--ink); border-color: var(--ink); color: #fff; }
.mb.pri { background: var(--blue); border-color: var(--blue); color: #fff; font-weight: 600; }
.mb.round { width: 34px; padding: 0; border-radius: 50%; background: var(--ink); color: #fff; border-color: var(--ink); }
.mb.num { min-width: 64px; justify-content: flex-end; }
.mdial { background: var(--ink); color: #fff; border-radius: 6px; padding: 12px; display: flex; flex-direction: column; align-items: center; gap: 6px; }
.mdial .dial { width: 170px; height: 164px; }
.mdial .dial svg { width: 170px; height: 170px; cursor: grab; }
.mtable { width: 100%; border-collapse: collapse; font-size: 13px; }
.mtable th { text-align: left; font-weight: 600; font-size: 11px; color: var(--muted); padding: 6px 8px; border-bottom: 1px solid var(--rule); white-space: nowrap; }
.mtable td { padding: 7px 8px; border-bottom: 1px solid var(--rule-2); vertical-align: middle; }
.mtable .dev td { background: var(--paper); font-weight: 600; font-size: 12px; color: var(--ink-2); }
.mtable .muted { color: var(--muted); }
.mbox { display: inline-block; width: 16px; height: 16px; border: 1.5px solid #8A919C; border-radius: 3px; vertical-align: middle; }
.mbox.on { background: var(--blue); border-color: var(--blue); box-shadow: inset 0 0 0 3px #fff; }
.mbox.off { background: var(--rule-2); border-color: var(--rule); }
.mfield { display: inline-block; min-width: 42px; padding: 3px 6px; border: 1px solid var(--rule); border-radius: 4px; background: #fff; text-align: right; }
.mtag { display: inline-block; font-size: 10px; font-weight: 700; padding: 2px 5px; border-radius: 3px; background: #FDE7E5; color: #B42318; }
.mlog { list-style: none; margin: 0; padding: 0; font-size: 13px; }
.mlog li { display: grid; grid-template-columns: 64px minmax(0, 1fr) auto; gap: 10px; padding: 8px 0; border-bottom: 1px solid var(--rule-2); align-items: center; }
.mlog time { color: var(--muted); font-size: 12px; }
.res { font-size: 11px; font-weight: 600; padding: 3px 6px; border-radius: 3px; background: var(--ok-bg); color: var(--ok); white-space: nowrap; }
.res.no { background: #FDE7E5; color: #B42318; }
.table-scroll { overflow-x: auto; }
@media (max-width: 900px) {
  .shot { grid-template-columns: 1fr; gap: 20px; padding: 36px 0; }
  .mock-2 { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .mock-top .tabs { margin-left: 0; }
  .mlog li { grid-template-columns: 1fr auto; }
  .mlog time { grid-column: 1 / -1; }
}

/* ---------- use-case pages ---------- */
.case { padding: 48px 0; border-top: 1px solid var(--rule); scroll-margin-top: 80px; }
.case-grid { display: grid; grid-template-columns: 140px minmax(0, 1fr); gap: 24px; }
.case dl { display: grid; grid-template-columns: 200px minmax(0, 1fr); margin: 20px 0 0; border-top: 1px solid var(--ink); }
.case dt, .case dd { padding: 12px 0; border-bottom: 1px solid var(--rule); margin: 0; }
.case dt { font: 600 15px var(--head); padding-right: 16px; }
.case dd { color: var(--ink-2); }
.case dd ul { margin: 0; padding-left: 1.1em; }
@media (max-width: 820px) {
  .case-grid { grid-template-columns: 1fr; gap: 4px; }
  .case dl { grid-template-columns: 1fr; }
  .case dt { border-bottom: 0; padding-bottom: 0; }
}

/* ---------- changelog ---------- */
.log { border-top: 1px solid var(--ink); }
.log article { display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: 24px; padding: 28px 0; border-bottom: 1px solid var(--rule); }
.log .ver { font: 600 26px/1 var(--head); }
.log time { display: block; margin-top: 8px; font: 500 12px var(--mono); color: var(--muted); letter-spacing: .04em; }
.log h3 { font-size: 16px; margin: 16px 0 6px; }
.log h3:first-child { margin-top: 0; }
.log ul { margin: 0; padding-left: 1.1em; color: var(--ink-2); }
.log li { margin-bottom: 5px; }
@media (max-width: 720px) { .log article { grid-template-columns: 1fr; gap: 10px; } }

/* ---------- contact ---------- */
.contact { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.contact > div { background: var(--white); border: 1px solid var(--rule); border-radius: 4px; padding: 20px; }
.contact h2 { font-size: 20px; }
.contact p { color: var(--ink-2); }
@media (max-width: 720px) { .contact { grid-template-columns: 1fr; } }