/* Kentro One — kone.kcn1.uk
   Sistema: tinta navy + blanco frío, una familia tipográfica, reglas de 1px.
   El rojo es una señal, no decoración. */

:root {
  --ink: #0A1628;
  --ink-2: #13233D;
  --ink-3: #1E3357;
  --paper: #F7F8FA;
  --white: #FFFFFF;
  --mist: #E6EAF0;
  --line: #D5DBE4;
  --slate: #4A5568;
  --slate-2: #6B7A90;
  --steel: #2F5D8A;
  --signal: #E63946;
  --signal-soft: #FDE8EA;
  --ok: #1F7A5C;
  --ok-soft: #E3F3EC;
  --warn: #B7791F;
  --warn-soft: #FBF1DC;

  --font: "Schibsted Grotesk", "Helvetica Neue", Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --max: 1180px;
  --gutter: clamp(20px, 4vw, 48px);
  --radius: 4px;

  --t-xs: 0.8125rem;   /* 13 */
  --t-sm: 0.9375rem;   /* 15 */
  --t-md: 1.0625rem;   /* 17 */
  --t-lg: 1.25rem;     /* 20 */
  --t-xl: clamp(1.5rem, 1.1rem + 1.6vw, 2.25rem);
  --t-2xl: clamp(2rem, 1.3rem + 2.8vw, 3.5rem);
  --t-3xl: clamp(2.4rem, 1.3rem + 3.6vw, 4.3rem);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--t-md);
  line-height: 1.55;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--steel); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--ink); }
h1, h2, h3, h4 { margin: 0; font-weight: 700; letter-spacing: -0.015em; line-height: 1.12; text-wrap: balance; }
h1 { font-size: var(--t-3xl); font-weight: 800; letter-spacing: -0.03em; line-height: 1.02; }
h2 { font-size: var(--t-2xl); letter-spacing: -0.025em; }
h3 { font-size: var(--t-xl); }
h4 { font-size: var(--t-lg); }
p { margin: 0 0 1em; max-width: 64ch; }
p:last-child { margin-bottom: 0; }
strong { font-weight: 700; }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.wrap { width: min(var(--max), 100% - 2 * var(--gutter)); margin-inline: auto; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; gap: 28px; height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 800; letter-spacing: -0.02em; font-size: 1.15rem; }
.brand .mark { width: 30px; height: 30px; }
.brand small { font-weight: 500; color: var(--slate-2); font-size: var(--t-xs); margin-left: 2px; align-self: flex-end; padding-bottom: 2px; }
.nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav > a, .nav > details > summary {
  display: inline-block; padding: 8px 12px; border-radius: var(--radius);
  color: var(--ink); text-decoration: none; font-size: var(--t-sm); font-weight: 500; cursor: pointer; list-style: none;
}
.nav > details > summary::-webkit-details-marker { display: none; }
.nav > a:hover, .nav > details > summary:hover, .nav > a[aria-current="page"] { background: var(--mist); }
.nav > details { position: relative; }
.nav > details[open] > summary { background: var(--mist); }
.nav .menu {
  position: absolute; top: calc(100% + 8px); left: 0; min-width: 300px;
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: 0 12px 30px -12px rgba(10, 22, 40, 0.25); padding: 6px;
}
.nav .menu a { display: grid; grid-template-columns: 1fr; padding: 10px 12px; text-decoration: none; color: var(--ink); border-radius: var(--radius); }
.nav .menu a:hover { background: var(--paper); }
.nav .menu a span { display: block; font-size: var(--t-xs); color: var(--slate-2); }
.nav .menu a b { font-weight: 600; font-size: var(--t-sm); }
.nav-actions { display: flex; align-items: center; gap: 8px; margin-left: 12px; }
.nav-toggle { display: none; margin-left: auto; background: none; border: 1px solid var(--line); border-radius: var(--radius); padding: 8px 10px; font: inherit; cursor: pointer; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 11px 18px;
  border-radius: var(--radius); border: 1px solid var(--ink);
  background: var(--ink); color: var(--white); text-decoration: none;
  font-weight: 600; font-size: var(--t-sm); line-height: 1; cursor: pointer; font-family: inherit;
}
.btn:hover { background: var(--ink-3); border-color: var(--ink-3); color: var(--white); }
.btn.signal { background: var(--signal); border-color: var(--signal); }
.btn.signal:hover { background: #C92E3A; border-color: #C92E3A; }
.btn.ghost { background: transparent; color: var(--ink); }
.btn.ghost:hover { background: var(--mist); color: var(--ink); }
.btn.on-ink { background: var(--white); color: var(--ink); border-color: var(--white); }
.btn.on-ink:hover { background: var(--mist); border-color: var(--mist); color: var(--ink); }
.btn.on-ink.ghost { background: transparent; color: var(--white); border-color: rgba(255,255,255,0.4); }
.btn.on-ink.ghost:hover { background: rgba(255,255,255,0.08); }

/* ---------- Sections ---------- */
.section { padding-block: clamp(56px, 8vw, 112px); }
.section.tight { padding-block: clamp(40px, 5vw, 72px); }
.section.ink { background: var(--ink); color: var(--white); }
.section.ink a { color: #BFD3EA; }
.section.ink a:hover { color: var(--white); }
.section.ink .lede, .section.ink .muted { color: #B9C3D3; }
.section.white { background: var(--white); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.lede { font-size: var(--t-lg); color: var(--slate); line-height: 1.5; max-width: 60ch; }
.muted { color: var(--slate-2); }
.small { font-size: var(--t-sm); }
.xs { font-size: var(--t-xs); }

.section-head { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 32px; align-items: end; margin-bottom: clamp(32px, 4vw, 56px); }
.section-head .lede { margin: 0; }
.kicker { font-size: var(--t-sm); color: var(--slate-2); margin-bottom: 12px; font-weight: 500; }
.section.ink .kicker { color: #8EA0BA; }

/* ---------- Hero ---------- */
.hero { padding-block: clamp(48px, 7vw, 96px) clamp(40px, 6vw, 80px); }
.hero .wrap { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 6fr); gap: clamp(32px, 5vw, 72px); align-items: center; }
.hero h1 { max-width: 14ch; }
.hero .lede { margin-top: 24px; }
.hero .actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 32px; }
.hero .proof { margin-top: 36px; padding-top: 20px; border-top: 1px solid var(--line); display: flex; gap: 28px; flex-wrap: wrap; font-size: var(--t-sm); color: var(--slate); }
.hero .proof b { display: block; color: var(--ink); font-size: var(--t-md); }

/* ---------- Product artifacts (the memorable thing) ---------- */
.artifact {
  background: var(--white); border: 1px solid var(--line); border-radius: 6px;
  box-shadow: 0 30px 60px -36px rgba(10, 22, 40, 0.45), 0 1px 0 var(--line);
  font-size: var(--t-sm); overflow: hidden;
}
.artifact .bar { display: flex; align-items: center; gap: 10px; padding: 10px 16px; border-bottom: 1px solid var(--line); background: var(--paper); font-size: var(--t-xs); color: var(--slate-2); }
.artifact .bar .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--line); }
.artifact .bar .dot.live { background: var(--ok); }
.artifact .bar .right { margin-left: auto; font-family: var(--mono); font-size: 12px; }
.artifact .body { padding: 18px 20px; }
.artifact h5 { margin: 0 0 4px; font-size: var(--t-lg); font-weight: 700; letter-spacing: -0.01em; line-height: 1.2; }
.artifact .meta { display: flex; flex-wrap: wrap; gap: 6px 14px; color: var(--slate-2); font-size: var(--t-xs); margin-bottom: 14px; }
.mono { font-family: var(--mono); font-size: 0.92em; }
.tag { display: inline-block; padding: 2px 8px; border-radius: 3px; font-size: 12px; font-weight: 600; line-height: 1.5; border: 1px solid transparent; }
.tag.crit { background: var(--signal-soft); color: #A91E2A; border-color: #F5C2C7; }
.tag.high { background: var(--warn-soft); color: #8A5A12; border-color: #EFD9A8; }
.tag.ok { background: var(--ok-soft); color: #165A44; border-color: #BFE3D2; }
.tag.kev { background: var(--ink); color: var(--white); }
.tag.neutral { background: var(--mist); color: var(--slate); }
.kv { display: grid; grid-template-columns: 150px 1fr; gap: 6px 14px; margin: 0; font-size: var(--t-sm); }
.kv dt { color: var(--slate-2); }
.kv dd { margin: 0; }
.artifact .rows { border-top: 1px solid var(--line); }
.artifact .row { display: grid; grid-template-columns: 1fr auto; gap: 12px; padding: 10px 20px; border-bottom: 1px solid var(--mist); align-items: center; }
.artifact .row:last-child { border-bottom: 0; }
.artifact .row .sub { color: var(--slate-2); font-size: var(--t-xs); }
.artifact .foot { padding: 12px 20px; background: var(--paper); border-top: 1px solid var(--line); font-size: var(--t-xs); color: var(--slate-2); display: flex; gap: 14px; flex-wrap: wrap; }
.artifact table { width: 100%; border-collapse: collapse; font-size: var(--t-xs); }
.artifact th { text-align: left; font-weight: 600; color: var(--slate-2); padding: 8px 20px; border-bottom: 1px solid var(--line); background: var(--paper); }
.artifact td { padding: 9px 20px; border-bottom: 1px solid var(--mist); vertical-align: top; }
.artifact tr:last-child td { border-bottom: 0; }
.artifact .claim { padding: 14px 20px; border-bottom: 1px solid var(--mist); display: grid; grid-template-columns: 110px 1fr; gap: 12px; }
.artifact .claim:last-child { border-bottom: 0; }
.artifact .claim .src { color: var(--slate-2); font-size: var(--t-xs); margin-top: 4px; word-break: break-all; }
.verified { color: var(--ok); font-weight: 600; }
.inferred { color: var(--warn); font-weight: 600; }
.unverified { color: var(--slate-2); font-weight: 600; }
.bar-meter { height: 6px; background: var(--mist); border-radius: 3px; overflow: hidden; }
.bar-meter i { display: block; height: 100%; background: var(--ink); }
.bar-meter i.signal { background: var(--signal); }

/* ---------- Ledger (module list) ---------- */
.ledger { border-top: 1px solid var(--line); }
.ledger-row {
  display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 6fr) minmax(0, 2fr);
  gap: 24px; padding: 28px 0; border-bottom: 1px solid var(--line); text-decoration: none; color: inherit;
}
a.ledger-row:hover { background: linear-gradient(90deg, var(--white), transparent); }
a.ledger-row:hover h3 { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 5px; }
.ledger-row h3 { font-size: var(--t-lg); margin-bottom: 4px; }
.ledger-row .what { color: var(--slate); }
.ledger-row .state { color: var(--slate-2); font-size: var(--t-sm); text-align: right; }
.section.ink .ledger { border-color: rgba(255,255,255,0.15); }
.section.ink .ledger-row { border-color: rgba(255,255,255,0.15); color: var(--white); }
.section.ink .ledger-row .what { color: #B9C3D3; }
.section.ink a.ledger-row:hover { background: rgba(255,255,255,0.04); }

/* ---------- Columns / grids ---------- */
.cols { display: grid; gap: clamp(24px, 4vw, 56px); }
.cols.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.cols.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.cols.split { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); align-items: start; }
.cols.split.rev { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.sticky { position: sticky; top: 92px; }

.feature { padding-top: 18px; border-top: 2px solid var(--ink); }
.feature h3 { font-size: var(--t-lg); margin-bottom: 8px; }
.feature p { color: var(--slate); font-size: var(--t-sm); }
.section.ink .feature { border-color: rgba(255,255,255,0.5); }
.section.ink .feature p { color: #B9C3D3; }

/* ---------- Process (real sequence) ---------- */
.steps { counter-reset: step; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; border: 1px solid var(--line); background: var(--white); }
.step { padding: 28px; border-right: 1px solid var(--line); }
.step:last-child { border-right: 0; }
.step::before { counter-increment: step; content: counter(step); display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; background: var(--ink); color: var(--white); font-weight: 700; font-size: var(--t-sm); margin-bottom: 16px; }
.step h3 { font-size: var(--t-lg); margin-bottom: 8px; }
.step p { font-size: var(--t-sm); color: var(--slate); }

/* ---------- Facts table ---------- */
.facts { width: 100%; border-collapse: collapse; font-size: var(--t-sm); }
.facts th, .facts td { text-align: left; padding: 14px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
.facts th { width: 32%; font-weight: 600; color: var(--slate); padding-right: 24px; }
.facts tr:first-child th, .facts tr:first-child td { border-top: 2px solid var(--ink); }
.section.ink .facts th, .section.ink .facts td { border-color: rgba(255,255,255,0.18); }
.section.ink .facts th { color: #B9C3D3; }
.section.ink .facts tr:first-child th, .section.ink .facts tr:first-child td { border-top-color: rgba(255,255,255,0.6); }

/* ---------- Check list ---------- */
.checks { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.checks li { position: relative; padding-left: 26px; font-size: var(--t-sm); color: var(--slate); }
.checks li::before { content: ""; position: absolute; left: 0; top: 7px; width: 14px; height: 8px; border-left: 2px solid var(--signal); border-bottom: 2px solid var(--signal); transform: rotate(-45deg); }
.section.ink .checks li { color: #D5DCE7; }
.checks.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }

/* ---------- Quote / callout ---------- */
.callout { border-left: 3px solid var(--signal); padding: 4px 0 4px 20px; max-width: 62ch; }
.callout p { font-size: var(--t-lg); line-height: 1.4; }
.callout cite { display: block; font-style: normal; color: var(--slate-2); font-size: var(--t-sm); margin-top: 10px; }

/* ---------- CTA band ---------- */
.cta-band { background: var(--ink); color: var(--white); }
.cta-band .wrap { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 32px; align-items: center; padding-block: clamp(48px, 6vw, 80px); }
.cta-band h2 { max-width: 18ch; }
.cta-band p { color: #B9C3D3; }
.cta-band .actions { display: flex; gap: 12px; flex-wrap: wrap; justify-content: flex-end; }

/* ---------- Page header (inner pages) ---------- */
.page-head { padding-block: clamp(48px, 6vw, 88px) clamp(32px, 4vw, 56px); border-bottom: 1px solid var(--line); }
.page-head .crumbs { font-size: var(--t-sm); color: var(--slate-2); margin-bottom: 20px; }
.page-head .crumbs a { color: var(--slate-2); text-decoration: none; }
.page-head .crumbs a:hover { color: var(--ink); text-decoration: underline; }
.page-head h1 { max-width: 16ch; font-size: var(--t-2xl); }
.page-head .lede { margin-top: 20px; }
.page-head .wrap { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 40px; align-items: end; }
.page-head .aside { font-size: var(--t-sm); color: var(--slate); border-left: 1px solid var(--line); padding-left: 24px; }
.page-head .aside dt { color: var(--slate-2); font-size: var(--t-xs); margin-top: 10px; }
.page-head .aside dd { margin: 0; }
.page-head .aside dl { margin: 0; }

/* ---------- Module nav ---------- */
.module-nav { display: flex; gap: 2px; flex-wrap: wrap; border-bottom: 1px solid var(--line); margin-bottom: 0; }
.module-nav a { padding: 12px 14px; font-size: var(--t-sm); color: var(--slate); text-decoration: none; border-bottom: 2px solid transparent; margin-bottom: -1px; }
.module-nav a:hover { color: var(--ink); }
.module-nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--signal); font-weight: 600; }

/* ---------- Sector cards (bordered rows) ---------- */
.sectors { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.sector { padding: 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--white); }
.sector h3 { font-size: var(--t-lg); margin-bottom: 8px; }
.sector p { font-size: var(--t-sm); color: var(--slate); }
.sector ul { margin: 12px 0 0; padding-left: 18px; font-size: var(--t-sm); color: var(--slate); }

/* ---------- Form ---------- */
.form { display: grid; gap: 18px; }
.form .two { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form label { display: block; font-size: var(--t-sm); font-weight: 600; margin-bottom: 6px; }
.form input, .form select, .form textarea {
  width: 100%; font: inherit; font-size: var(--t-sm); padding: 11px 12px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); color: var(--ink);
}
.form input:focus, .form select:focus, .form textarea:focus { outline: 2px solid var(--ink); outline-offset: 0; border-color: var(--ink); }
.form textarea { min-height: 120px; resize: vertical; }
.form .hint { font-size: var(--t-xs); color: var(--slate-2); margin-top: 6px; }
.form .hp { position: absolute; left: -9999px; }
.form-status { padding: 12px 14px; border-radius: var(--radius); font-size: var(--t-sm); display: none; }
.form-status.ok { display: block; background: var(--ok-soft); color: #165A44; }
.form-status.err { display: block; background: var(--signal-soft); color: #A91E2A; }

/* ---------- Prose (legal) ---------- */
.prose { max-width: 70ch; }
.prose h2 { font-size: var(--t-xl); margin: 40px 0 12px; }
.prose h3 { font-size: var(--t-lg); margin: 28px 0 8px; }
.prose ul { padding-left: 20px; color: var(--slate); }
.prose p { color: var(--slate); }

/* ---------- Footer ---------- */
.site-footer { background: var(--white); border-top: 1px solid var(--line); padding-block: 48px 32px; font-size: var(--t-sm); color: var(--slate); }
.site-footer .grid { display: grid; grid-template-columns: minmax(0, 4fr) repeat(3, minmax(0, 2fr)); gap: 32px; }
.site-footer h4 { font-size: var(--t-sm); margin-bottom: 12px; color: var(--ink); }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.site-footer a { color: var(--slate); text-decoration: none; }
.site-footer a:hover { color: var(--ink); text-decoration: underline; }
.site-footer .legal { margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: var(--t-xs); color: var(--slate-2); }
.site-footer .cert { display: inline-flex; align-items: center; gap: 10px; margin-top: 16px; padding: 10px 12px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); font-size: var(--t-xs); color: var(--slate); }
.site-footer .cert svg { width: 22px; height: 22px; flex: none; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero .wrap, .section-head, .cols.two, .cols.three, .cols.split, .cols.split.rev, .cta-band .wrap, .page-head .wrap { grid-template-columns: 1fr; }
  .ledger-row { grid-template-columns: 1fr; gap: 8px; }
  .ledger-row .state { text-align: left; }
  .steps { grid-template-columns: 1fr; }
  .step { border-right: 0; border-bottom: 1px solid var(--line); }
  .step:last-child { border-bottom: 0; }
  .site-footer .grid { grid-template-columns: 1fr 1fr; }
  .sticky { position: static; }
  .cta-band .actions { justify-content: flex-start; }
  .page-head .aside { border-left: 0; padding-left: 0; border-top: 1px solid var(--line); padding-top: 16px; }
  .hero h1 { max-width: none; }
}
@media (max-width: 760px) {
  .nav-toggle { display: inline-block; }
  .nav { display: none; position: absolute; top: 68px; left: 0; right: 0; flex-direction: column; align-items: stretch; background: var(--white); border-bottom: 1px solid var(--line); padding: 12px var(--gutter) 20px; gap: 2px; }
  .nav.open { display: flex; }
  .nav .menu { position: static; box-shadow: none; border: 0; padding: 0 0 0 12px; min-width: 0; }
  .nav-actions { margin: 12px 0 0; flex-direction: column; align-items: stretch; }
  .nav-actions .btn { justify-content: center; }
  .sectors { grid-template-columns: 1fr; }
  .form .two { grid-template-columns: 1fr; }
  .checks.two { grid-template-columns: 1fr; }
  .kv { grid-template-columns: 1fr; gap: 2px 0; }
  .kv dt { margin-top: 8px; }
  .artifact .claim { grid-template-columns: 1fr; }
  .site-footer .grid { grid-template-columns: 1fr; }
}