/* Cadres — Operating Record design system
   Used by the redesigned top-level pages. Blog and manual pages keep styles.css. */

:root {
  --ground: #15171a;
  --panel: #1c1f23;
  --panel-2: #22262b;
  --line: #2e3238;
  --line-strong: #3c4148;
  --ink: #e8e6e1;
  --ink-soft: #b9bcc2;
  --ink-mute: #878c95;
  --copper: #c98544;
  --copper-hi: #e0a370;
  --copper-deep: #9c5f27;
  --steel: #aab0b8;
  --stamp: #c98544;
  --sheet-gap: clamp(16px, 3vw, 40px);
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --ground: #f2f0ea;
    --panel: #faf9f5;
    --panel-2: #edeae2;
    --line: #d8d4c9;
    --line-strong: #bcb7a9;
    --ink: #1c1e21;
    --ink-soft: #43464c;
    --ink-mute: #767a82;
    --copper: #a2621f;
    --copper-hi: #b87333;
    --copper-deep: #7c4a1e;
    --steel: #6e747d;
    --stamp: #a2621f;
  }
}
:root[data-theme="light"] {
  --ground: #f2f0ea;
  --panel: #faf9f5;
  --panel-2: #edeae2;
  --line: #d8d4c9;
  --line-strong: #bcb7a9;
  --ink: #1c1e21;
  --ink-soft: #43464c;
  --ink-mute: #767a82;
  --copper: #a2621f;
  --copper-hi: #b87333;
  --copper-deep: #7c4a1e;
  --steel: #6e747d;
  --stamp: #a2621f;
}

* { box-sizing: border-box; margin: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--ground);
  color: var(--ink);
  font-family: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  font-weight: 450;
  line-height: 1.55;
  font-size: 16px;
}
::selection { background: var(--copper); color: var(--ground); }
img { max-width: 100%; }

.sheet { max-width: 1240px; margin: 0 auto; padding: 0 var(--sheet-gap); }
.frame { border-left: 1px solid var(--line); border-right: 1px solid var(--line); }

.mono { font-family: "IBM Plex Mono", ui-monospace, "SF Mono", Consolas, monospace; }
.label {
  font-family: "IBM Plex Mono", ui-monospace, Consolas, monospace;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.label b { color: var(--copper); font-weight: 600; }

h1, h2, h3, .display {
  font-family: "Big Shoulders", "Arial Narrow", "Helvetica Neue", sans-serif;
  font-optical-sizing: auto;
  text-transform: uppercase;
  line-height: 0.95;
  letter-spacing: 0.005em;
  text-wrap: balance;
  font-weight: 700;
}

/* ---------- title block (header) ---------- */
.titleblock {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  border-bottom: 1px solid var(--line);
  align-items: stretch;
  position: relative;
}
.titleblock > div {
  padding: 14px 18px;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 2px;
}
.titleblock > div:first-child { border-left: none; padding-left: 0; }
.titleblock > div:last-child { border-right: none; padding-right: 0; }
.wordmark {
  font-family: "Big Shoulders", sans-serif;
  font-weight: 800;
  font-size: 30px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
}
.wordmark span { color: var(--copper); }
.tb-nav { flex-direction: row !important; align-items: center; gap: 26px !important; flex-wrap: wrap; }
.tb-nav a, .nav a {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 3px 0;
  border-bottom: 1px solid transparent;
}
.tb-nav a:hover, .tb-nav a:focus-visible,
.nav a:hover, .nav a:focus-visible { color: var(--copper); border-bottom-color: var(--copper); outline: none; }
.tb-meta { text-align: right; }
.tb-cta, .btn {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 12px 22px;
  border: 1px solid var(--line-strong);
  color: var(--ink);
  display: inline-block;
  background: transparent;
  cursor: pointer;
}
.tb-cta { align-self: center; padding: 10px 18px; }
.tb-cta, .btn.primary { background: var(--copper); border-color: var(--copper); color: var(--ground); }
.tb-cta:hover, .btn.primary:hover { background: var(--copper-hi); border-color: var(--copper-hi); color: var(--ground); }
.btn:hover, .btn:focus-visible { border-color: var(--copper); color: var(--copper); outline: none; }
.btn.primary:hover { color: var(--ground); }
.tb-cta:focus-visible, .btn:focus-visible { outline: 2px solid var(--copper); outline-offset: 2px; }

/* mobile nav */
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line-strong);
  padding: 10px;
  cursor: pointer;
  flex-direction: column;
  gap: 4px;
  align-self: center;
}
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--ink); }

/* ---------- section keying ---------- */
.sectkey {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}
.sectkey .rule { flex: 1; border-top: 1px solid var(--line); align-self: center; }

/* ---------- hero ---------- */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(24px, 4vw, 56px);
  padding: clamp(36px, 6vw, 72px) 0 clamp(32px, 5vw, 64px);
  align-items: center;
}
.hero h1 { font-size: clamp(44px, 6.2vw, 84px); font-weight: 800; }
.hero h1 .alt { color: var(--copper); }
.hero .thesis { margin-top: 22px; color: var(--ink-soft); max-width: 46ch; }
.hero .thesis strong { color: var(--ink); font-weight: 600; }
.hero-ctas { display: flex; gap: 14px; margin-top: 30px; flex-wrap: wrap; }

/* ---------- schematic ---------- */
.schematic {
  border: 1px solid var(--line);
  background:
    repeating-linear-gradient(0deg, transparent 0 39px, var(--line) 39px 40px),
    repeating-linear-gradient(90deg, transparent 0 39px, var(--line) 39px 40px),
    var(--panel);
  position: relative;
  padding: 10px;
}
.schematic .corner { position: absolute; width: 9px; height: 9px; border: 1px solid var(--copper); }
.corner.tl { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.corner.tr { top: -1px; right: -1px; border-left: 0; border-bottom: 0; }
.corner.bl { bottom: -1px; left: -1px; border-right: 0; border-top: 0; }
.corner.br { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }
.schematic svg { display: block; width: 100%; height: auto; }
.schematic text {
  font-family: "IBM Plex Mono", monospace;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  fill: var(--ink-soft);
}
.schematic .nodename { font-size: 12.5px; font-weight: 600; fill: var(--ink); }
.schematic .noderole { font-size: 8.5px; fill: var(--ink-mute); }
.schematic .edge { stroke: var(--line-strong); stroke-width: 1; fill: none; }
.schematic .edge.bridge { stroke: var(--copper); stroke-dasharray: 5 4; opacity: 0.75; }
.schematic .edge.ident { stroke: var(--steel); stroke-dasharray: 1.5 3.5; opacity: 0.55; }
.schematic .nodebox { fill: var(--panel-2); stroke: var(--line-strong); }
.schematic .nodebox.hub { stroke: var(--copper); }
.schematic .pulse { fill: var(--copper-hi); }
.schematic .caption { font-size: 9px; fill: var(--ink-mute); }
.schematic .caption.sm { font-size: 8px; }
@media (prefers-reduced-motion: no-preference) {
  .pulse { animation: travel 5.2s linear infinite; }
  .pulse.p2 { animation-delay: 1.4s; }
  .pulse.p3 { animation-delay: 2.7s; }
}
@keyframes travel { from { offset-distance: 0%; } to { offset-distance: 100%; } }

/* ---------- readouts ---------- */
.readouts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.readout { padding: 26px 22px 22px; border-right: 1px solid var(--line); }
.readout:last-child { border-right: none; }
.readout .value {
  font-family: "Big Shoulders", sans-serif;
  font-weight: 800;
  font-size: clamp(44px, 5vw, 64px);
  line-height: 1;
  color: var(--copper);
  font-variant-numeric: tabular-nums;
}
.readout .what { margin-top: 8px; color: var(--ink); font-weight: 600; font-size: 14px; }
.readout .how { margin-top: 4px; color: var(--ink-mute); font-size: 12.5px; line-height: 1.5; }

/* ---------- nameplates ---------- */
.plates {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  padding: clamp(28px, 4vw, 48px) 0;
}
.plate {
  border: 1px solid var(--line-strong);
  background: linear-gradient(160deg, var(--panel-2), var(--panel) 55%);
  position: relative;
  padding: 22px 22px 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  text-decoration: none;
  color: inherit;
  transition: border-color 160ms ease, transform 160ms ease;
}
.plate:hover, .plate:focus-visible { border-color: var(--copper); transform: translateY(-2px); outline: none; }
@media (prefers-reduced-motion: reduce) { .plate, .plate:hover { transform: none; transition: none; } }
.plate::before, .plate::after,
.plate .rivet-b::before, .plate .rivet-b::after {
  content: "";
  position: absolute;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--line-strong);
  box-shadow: inset 0 1px 1px rgba(0,0,0,0.5);
}
.plate::before { top: 8px; left: 8px; }
.plate::after { top: 8px; right: 8px; }
.plate .rivet-b::before { bottom: 8px; left: 8px; }
.plate .rivet-b::after { bottom: 8px; right: 8px; }
.plate-head { display: flex; align-items: center; gap: 14px; }
.plate-glyph { flex: none; width: 52px; height: 52px; }
.plate-glyph .g-stroke { stroke: var(--copper); stroke-width: 5; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.plate-glyph .g-steel { stroke: var(--steel); }
.plate h3 { font-size: 30px; font-weight: 800; letter-spacing: 0.03em; }
.plate .role { font-size: 10.5px; margin-top: 3px; }
.plate p { color: var(--ink-soft); font-size: 13.5px; line-height: 1.55; }
.spec { border-top: 1px solid var(--line); margin-top: auto; }
.spec-row {
  display: flex; justify-content: space-between; gap: 12px;
  padding: 7px 0;
  border-bottom: 1px solid var(--line);
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.04em;
}
.spec-row .k { color: var(--ink-mute); text-transform: uppercase; letter-spacing: 0.1em; }
.spec-row .v { color: var(--ink); text-align: right; }
.plate-foot { display: flex; justify-content: space-between; align-items: center; padding-top: 4px; }
.stamp {
  font-family: "IBM Plex Mono", monospace;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--stamp);
  border: 1.5px solid var(--stamp);
  padding: 4px 9px;
  transform: rotate(-2deg);
  opacity: 0.9;
  border-radius: 2px;
  white-space: nowrap;
}
.plate-foot .go {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.plate:hover .go { color: var(--copper); }

/* ---------- doctrine / rule rows ---------- */
.doctrine {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  gap: clamp(24px, 4vw, 60px);
  padding: clamp(32px, 5vw, 64px) 0;
  border-top: 1px solid var(--line);
}
.doctrine h2 { font-size: clamp(34px, 4vw, 54px); font-weight: 800; }
.doctrine h2 em { font-style: normal; color: var(--copper); }
.doctrine .intro { margin-top: 16px; color: var(--ink-soft); max-width: 40ch; }
.rules { display: grid; gap: 0; border-top: 1px solid var(--line); }
.rule-row {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.rule-row .idx {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  color: var(--copper);
  letter-spacing: 0.1em;
  padding-top: 3px;
}
.rule-row h4 { font-family: "IBM Plex Sans", sans-serif; font-weight: 600; font-size: 15px; }
.rule-row p { color: var(--ink-mute); font-size: 13.5px; margin-top: 4px; max-width: 62ch; }

/* ---------- product page ---------- */
.prod-hero {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(24px, 4vw, 56px);
  padding: clamp(36px, 5vw, 64px) 0;
  align-items: start;
}
.prod-hero h1 { font-size: clamp(40px, 5.6vw, 72px); font-weight: 800; margin-top: 14px; }
.prod-hero .lead { margin-top: 20px; color: var(--ink-soft); max-width: 58ch; }
.prod-side {
  border: 1px solid var(--line-strong);
  background: linear-gradient(160deg, var(--panel-2), var(--panel) 55%);
  padding: 24px;
  position: relative;
}
.prod-side .plate-glyph { width: 64px; height: 64px; margin-bottom: 14px; }
.prod-side h3 { font-size: 22px; margin: 12px 0 8px; }
.prod-side p { color: var(--ink-soft); font-size: 13.5px; }
.prod-side ul { margin: 14px 0 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.prod-side li {
  color: var(--ink-soft);
  font-size: 13px;
  padding-left: 16px;
  position: relative;
}
.prod-side li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.55em;
  width: 7px; height: 1.5px;
  background: var(--copper);
}
.detailgrid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
  padding: clamp(28px, 4vw, 48px) 0;
}
.detail {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 24px;
}
.detail h3 {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.03em;
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.detail p { color: var(--ink-soft); font-size: 14px; }

/* ---------- FAQ ---------- */
.faq { padding: clamp(24px, 4vw, 44px) 0; display: grid; gap: 0; border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  cursor: pointer;
  padding: 16px 0;
  font-weight: 600;
  font-size: 15px;
  color: var(--ink);
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  font-family: "IBM Plex Mono", monospace;
  color: var(--copper);
}
.faq details[open] summary::after { content: "–"; }
.faq details p { color: var(--ink-soft); font-size: 14px; padding: 0 0 18px; max-width: 70ch; }

/* ---------- contact / trial form ---------- */
.contact {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(24px, 4vw, 60px);
  padding: clamp(36px, 5vw, 72px) 0;
  border-top: 1px solid var(--line);
}
.contact h2 { font-size: clamp(38px, 5vw, 60px); font-weight: 800; }
.contact .lead { margin-top: 16px; color: var(--ink-soft); max-width: 46ch; }
.contact-points { margin-top: 22px; display: grid; gap: 14px; }
.contact-points .point { border-left: 2px solid var(--copper); padding-left: 14px; }
.contact-points .point p { color: var(--ink-mute); font-size: 13.5px; margin-top: 2px; }
.tform {
  border: 1px solid var(--line-strong);
  background: var(--panel);
  padding: 26px;
  display: grid;
  gap: 16px;
}
.tform .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.tform label {
  display: grid;
  gap: 6px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.tform input, .tform select, .tform textarea {
  font-family: "IBM Plex Sans", sans-serif;
  font-size: 14px;
  color: var(--ink);
  background: var(--ground);
  border: 1px solid var(--line-strong);
  padding: 11px 12px;
  border-radius: 0;
  width: 100%;
}
.tform input:focus, .tform select:focus, .tform textarea:focus {
  outline: none;
  border-color: var(--copper);
}
.tform .form-note { font-size: 12px; color: var(--ink-mute); }
.honeypot { position: absolute; left: -9999px; opacity: 0; height: 0; width: 0; }

/* ---------- cta panel ---------- */
.cta {
  border-top: 1px solid var(--line);
  padding: clamp(40px, 6vw, 80px) 0;
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(24px, 4vw, 60px);
  align-items: center;
}
.cta h2 { font-size: clamp(38px, 5vw, 64px); font-weight: 800; }
.cta p { margin-top: 16px; color: var(--ink-soft); max-width: 52ch; }
.cta-panel { border: 1px solid var(--line-strong); background: var(--panel); padding: 26px; }
.cta-panel .row {
  display: flex; justify-content: space-between;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
  font-family: "IBM Plex Mono", monospace;
  font-size: 11.5px;
}
.cta-panel .row .k { color: var(--ink-mute); text-transform: uppercase; letter-spacing: 0.1em; }
.cta-panel .row .v { color: var(--ink); }
.cta-panel .btn { display: block; text-align: center; margin-top: 18px; }

/* ---------- footer ---------- */
.site-foot {
  border-top: 1px solid var(--line);
  padding: 22px 0 40px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.site-foot a { color: inherit; text-decoration: none; }
.site-foot a:hover { color: var(--copper); }

/* ---------- responsive ---------- */
@media (max-width: 940px) {
  .hero, .doctrine, .cta, .contact, .prod-hero { grid-template-columns: 1fr; }
  .plates, .detailgrid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .readouts { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .readout:nth-child(2) { border-right: none; }
  .readout:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .titleblock { grid-template-columns: auto 1fr auto; }
  .tb-meta { display: none; }
}
@media (max-width: 720px) {
  .titleblock { grid-template-columns: 1fr auto; }
  .titleblock .tb-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: var(--panel);
    border-bottom: 1px solid var(--line);
    padding: 16px var(--sheet-gap) !important;
    z-index: 20;
  }
  .titleblock .tb-nav.open { display: flex; }
  .nav-toggle { display: flex; }
  .titleblock > div { border-right: none; }
}
@media (max-width: 620px) {
  .plates, .detailgrid, .tform .form-row { grid-template-columns: 1fr; }
}