/* Keelson Labs — marketing site
   Identity: the page as a technical drawing sheet.
   Hairline rules, margin annotation, brass hardware accent. */

/* ---------- Tokens: light is the base, both dark states redefine ---------- */
:root {
  --paper:      #ECEEF0;
  --paper-2:    #F6F7F8;
  --paper-3:    #E1E5E8;
  --ink:        #16191C;
  --ink-2:      #56606A;
  --ink-3:      #868F99;
  --rule:       #C8CED4;
  --rule-soft:  #DBE0E4;
  --brass:      #8A5E17;
  --brass-hi:   #B07D28;
  --oxide:      #A33A2A;
  --admit:      #1F6B5C;
  --hatch:      rgba(22, 25, 28, .10);
  --focus:      #8A5E17;

  --f-display: "Archivo", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --f-prose:   "Newsreader", ui-serif, Georgia, "Times New Roman", serif;
  --f-mono:    "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --measure: 66ch;
  --wide: 1140px;
  --gutter: clamp(20px, 5vw, 64px);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper:     #0E1316;
    --paper-2:   #151C20;
    --paper-3:   #1B2328;
    --ink:       #E4E8EA;
    --ink-2:     #9AA6AE;
    --ink-3:     #6C777F;
    --rule:      #28323A;
    --rule-soft: #1E262B;
    --brass:     #D6A24A;
    --brass-hi:  #E8BC6C;
    --oxide:     #E08471;
    --admit:     #58B39A;
    --hatch:     rgba(228, 232, 234, .09);
    --focus:     #D6A24A;
  }
}
:root[data-theme="dark"] {
  --paper:     #0E1316;
  --paper-2:   #151C20;
  --paper-3:   #1B2328;
  --ink:       #E4E8EA;
  --ink-2:     #9AA6AE;
  --ink-3:     #6C777F;
  --rule:      #28323A;
  --rule-soft: #1E262B;
  --brass:     #D6A24A;
  --brass-hi:  #E8BC6C;
  --oxide:     #E08471;
  --admit:     #58B39A;
  --hatch:     rgba(228, 232, 234, .09);
  --focus:     #D6A24A;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--f-prose);
  font-size: 1.0625rem;
  line-height: 1.62;
  font-synthesis-weight: none;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; }
a { color: inherit; text-underline-offset: 3px; text-decoration-color: var(--rule); }
a:hover { text-decoration-color: var(--brass); }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; }
::selection { background: var(--brass); color: var(--paper); }

h1, h2, h3, h4 {
  font-family: var(--f-display);
  font-weight: 600;
  letter-spacing: -.021em;
  line-height: 1.12;
  text-wrap: balance;
  margin: 0;
}
p { margin: 0; }

/* ---------- Layout primitives ---------- */
.wrap { width: 100%; max-width: var(--wide); margin-inline: auto; padding-inline: var(--gutter); }
.measure { max-width: var(--measure); }
.stack   { display: flex; flex-direction: column; }
.stack-3 { gap: .75rem; }  .stack-4 { gap: 1rem; }
.stack-6 { gap: 1.5rem; }  .stack-8 { gap: 2rem; }
.stack-12{ gap: 3rem; }

section.band { padding-block: clamp(3.25rem, 7vw, 6rem); border-top: 1px solid var(--rule-soft); }
section.band:first-of-type { border-top: 0; }

/* Eyebrow: the drawing-sheet annotation in the margin */
.eyebrow {
  font-family: var(--f-mono);
  font-size: .6875rem;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--brass);
  display: flex;
  align-items: center;
  gap: .7rem;
  margin-bottom: 1.4rem;
}
.eyebrow::after { content: ""; flex: 1; height: 1px; background: var(--rule); }

.h-xl { font-size: clamp(2.1rem, 5.6vw, 3.9rem); }
.h-lg { font-size: clamp(1.75rem, 3.6vw, 2.6rem); }
.h-md { font-size: clamp(1.25rem, 2.2vw, 1.55rem); }
.h-sm { font-size: 1.0625rem; font-weight: 600; letter-spacing: -.01em; }

.lede { font-size: clamp(1.1rem, 1.9vw, 1.3rem); line-height: 1.55; color: var(--ink-2); }
.muted { color: var(--ink-2); }
.faint { color: var(--ink-3); }
.small { font-size: .9375rem; line-height: 1.55; }

.mono {
  font-family: var(--f-mono);
  font-size: .78rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--ink-3);
}

/* ---------- Header ---------- */
.site-head {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  z-index: 40;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--rule-soft);
}
.site-head__in {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; min-height: 62px;
}
.brand { display: inline-flex; align-items: center; gap: .6rem; text-decoration: none; border-radius: 2px; }
.brand:hover { outline: 2px solid var(--brass); outline-offset: 3px; }
.brand__mark { flex: none; color: var(--brass); }
.brand__name {
  font-family: var(--f-display); font-weight: 600; font-size: .98rem;
  letter-spacing: .11em; text-transform: uppercase; color: var(--ink);
}
.nav { display: flex; align-items: center; gap: 1.45rem; }
.nav a {
  font-family: var(--f-mono); font-size: .75rem; letter-spacing: .075em;
  text-transform: uppercase; color: var(--ink-2); text-decoration: none;
  padding-block: .3rem; border-bottom: 1px solid transparent;
}
.nav a:hover { color: var(--ink); }
.nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--brass); }

.head-tools { display: flex; align-items: center; gap: .6rem; }
.icon-btn {
  display: inline-grid; place-items: center; width: 34px; height: 34px;
  border: 1px solid var(--rule); background: transparent; color: var(--ink-2);
  border-radius: 2px; cursor: pointer; padding: 0;
}
.icon-btn:hover { color: var(--ink); border-color: var(--brass); }
.nav-toggle { display: none; }

@media (max-width: 860px) {
  .nav {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--paper); border-bottom: 1px solid var(--rule);
    padding: .5rem var(--gutter) 1rem;
  }
  .nav.is-open { display: flex; }
  .nav a { padding-block: .75rem; border-bottom: 1px solid var(--rule-soft); }
  .nav a[aria-current="page"] { border-bottom-color: var(--brass); }
  .nav-toggle { display: inline-grid; }
}

/* ---------- Hero ---------- */
.hero { padding-block: clamp(3rem, 7vw, 5.5rem) clamp(2.5rem, 5vw, 4rem); }
.hero h1 { font-size: clamp(2.2rem, 5.3vw, 4.05rem); letter-spacing: -.028em; }
.hero__claim {
  font-size: clamp(1.1rem, 2vw, 1.34rem); line-height: 1.5;
  color: var(--ink-2); max-width: 54ch;
}
.status {
  display: inline-flex; align-items: center; gap: .55rem;
  font-family: var(--f-mono); font-size: .7rem; letter-spacing: .1em;
  text-transform: uppercase; color: var(--ink-2);
  border: 1px solid var(--rule); border-radius: 999px;
  padding: .32rem .75rem .32rem .6rem; background: var(--paper-2);
}
.status::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--brass); flex: none;
}

/* ---------- Buttons ---------- */
.btn-row { display: flex; flex-wrap: wrap; gap: .75rem; }
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  font-family: var(--f-mono); font-size: .78rem; letter-spacing: .07em;
  text-transform: uppercase; text-decoration: none;
  padding: .72rem 1.15rem; border-radius: 2px; border: 1px solid var(--ink);
  background: var(--ink); color: var(--paper); transition: opacity .15s ease;
}
.btn:hover { opacity: .85; }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--rule); }
.btn--ghost:hover { border-color: var(--brass); color: var(--ink); opacity: 1; }

/* ---------- Schematic ---------- */
.schematic { border: 1px solid var(--rule); background: var(--paper-2); border-radius: 2px; }
.schematic__scroll { overflow-x: auto; padding: 1.25rem; }
.schematic__scroll svg { min-width: 700px; display: block; height: auto; }
.schematic__cap {
  border-top: 1px solid var(--rule-soft); padding: .8rem 1.25rem;
  font-family: var(--f-mono); font-size: .7rem; letter-spacing: .05em;
  color: var(--ink-3); text-transform: uppercase;
}

/* ---------- Grids & drawn blocks ---------- */
.grid { display: grid; gap: 1px; background: var(--rule-soft); border: 1px solid var(--rule-soft); }
.grid > * { background: var(--paper); padding: 1.4rem 1.5rem; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) { .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; } }

.cell__k {
  font-family: var(--f-mono); font-size: .68rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--brass); display: block; margin-bottom: .55rem;
}
.cell h3 { margin-bottom: .5rem; }
.cell p { color: var(--ink-2); font-size: .98rem; }

/* Numbered rows — used only where the sequence is real */
.seq { display: flex; flex-direction: column; }
.seq__row {
  display: grid; grid-template-columns: 2.6rem 1fr; gap: 1.1rem;
  padding-block: 1.35rem; border-top: 1px solid var(--rule-soft);
}
.seq__row:first-child { border-top: 0; }
.seq__n {
  font-family: var(--f-mono); font-size: .8rem; color: var(--brass);
  padding-top: .18rem; font-variant-numeric: tabular-nums;
}
.seq__body p { color: var(--ink-2); font-size: .98rem; margin-top: .35rem; }

/* Claim / counter-claim list */
.ledger { border-top: 1px solid var(--rule); }
.ledger__row {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem;
  padding-block: 1.15rem; border-bottom: 1px solid var(--rule-soft);
  align-items: start;
}
@media (max-width: 720px) { .ledger__row { grid-template-columns: 1fr; gap: .4rem; } }
.ledger__yes { color: var(--ink); }
.ledger__no  { color: var(--ink-2); }
.tick { color: var(--admit); font-family: var(--f-mono); margin-right: .5rem; }
.cross { color: var(--oxide); font-family: var(--f-mono); margin-right: .5rem; }

/* Stat / fact blocks */
.facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--rule-soft);
         border-block: 1px solid var(--rule-soft); }
.facts > * { background: var(--paper); padding: 1.6rem 1.5rem; }
@media (max-width: 800px) { .facts { grid-template-columns: 1fr; } }
.fact__n {
  font-family: var(--f-display); font-weight: 600; font-size: clamp(1.9rem, 3.6vw, 2.5rem);
  letter-spacing: -.03em; color: var(--ink); font-variant-numeric: tabular-nums;
  display: block; margin-bottom: .55rem;
}
.fact p { font-size: .96rem; color: var(--ink-2); }
.fact cite {
  display: block; margin-top: .7rem; font-style: normal;
  font-family: var(--f-mono); font-size: .68rem; letter-spacing: .06em;
  text-transform: uppercase; color: var(--ink-3);
}

/* Tables */
.table-scroll { overflow-x: auto; border: 1px solid var(--rule-soft); border-radius: 2px; }
table { border-collapse: collapse; width: 100%; min-width: 620px; font-size: .95rem; }
th, td { text-align: left; padding: .85rem 1.1rem; border-bottom: 1px solid var(--rule-soft); vertical-align: top; }
thead th {
  font-family: var(--f-mono); font-size: .67rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--ink-3); font-weight: 500;
  background: var(--paper-2); border-bottom-color: var(--rule);
}
tbody tr:last-child td { border-bottom: 0; }
td strong { font-family: var(--f-display); font-weight: 600; letter-spacing: -.01em; }

/* Callout */
.callout {
  border-left: 2px solid var(--brass); padding: .2rem 0 .2rem 1.35rem;
  color: var(--ink); font-size: 1.08rem; line-height: 1.55;
}
.note {
  background: var(--paper-2); border: 1px solid var(--rule-soft);
  border-radius: 2px; padding: 1.1rem 1.25rem; font-size: .93rem; color: var(--ink-2);
}
.note strong { color: var(--ink); }

/* Prose */
.prose p + p { margin-top: 1rem; }
.prose h3 { margin-top: 2.2rem; margin-bottom: .6rem; }
.prose ul { margin: .75rem 0 0; padding-left: 1.15rem; color: var(--ink-2); }
.prose li { margin-bottom: .45rem; }
.prose li::marker { color: var(--brass); }

/* Roles list */
.role { display: grid; grid-template-columns: 1fr auto; gap: 1rem; align-items: baseline;
        padding-block: 1.05rem; border-bottom: 1px solid var(--rule-soft); }
.role:first-child { border-top: 1px solid var(--rule); }
.role__t { font-family: var(--f-display); font-weight: 600; font-size: 1.02rem; letter-spacing: -.01em; }
.role__d { color: var(--ink-2); font-size: .94rem; margin-top: .2rem; }
.role__w { font-family: var(--f-mono); font-size: .7rem; letter-spacing: .08em;
           text-transform: uppercase; color: var(--ink-3); white-space: nowrap; }
@media (max-width: 560px) { .role { grid-template-columns: 1fr; } }

/* CTA band */
.cta { background: var(--paper-2); border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }

/* Footer */
.site-foot { border-top: 1px solid var(--rule); padding-block: 2.75rem 3.25rem; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 2rem; }
@media (max-width: 760px) { .foot-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 460px) { .foot-grid { grid-template-columns: 1fr; } }
.foot-col h4 {
  font-family: var(--f-mono); font-size: .67rem; letter-spacing: .13em;
  text-transform: uppercase; color: var(--ink-3); font-weight: 500; margin-bottom: .85rem;
}
.foot-col a { display: block; text-decoration: none; color: var(--ink-2); font-size: .95rem; padding-block: .26rem; }
.foot-col a:hover { color: var(--ink); }
.foot-legal {
  margin-top: 2.5rem; padding-top: 1.35rem; border-top: 1px solid var(--rule-soft);
  display: flex; flex-wrap: wrap; gap: .75rem 1.5rem; justify-content: space-between;
  font-size: .82rem; color: var(--ink-3);
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}