/* ============================================================================
   TECTOSTACK — "Toolchain Editorial" design system
   tectostack.com · static · CSP script-src 'self' · WCAG 2.2 AA targets
   ----------------------------------------------------------------------------
   Type scales, tokens and every component class used across the site.
   Pages use EXACTLY these classes — no page invents its own.
   Fonts are system stacks: no vendored binaries, no CDN, zero font requests.
   ========================================================================== */

/* -- tokens -------------------------------------------------------------- */
:root {
  --bg:        #0d1117;   /* page background            */
  --panel:     #161b22;   /* cards, terminals, tiles    */
  --panel-2:   #1c2129;   /* raised panel (hover)       */
  --line:      #2a313c;   /* hairline rules             */
  --ink:       #e6edf3;   /* primary text  (AA on bg)   */
  --muted:     #9aa7b4;   /* secondary text (AA on bg)  */
  --accent:    #5eead4;   /* teal-300 — brand accent    */
  --accent-ink:#0d1117;   /* ink ON accent              */
  --diff-add:  #3fb950;   /* + added                    */
  --diff-mod:  #d29922;   /* ~ improved                 */
  --diff-del:  #f85149;   /* - removed                  */
  --focus:     #5eead4;

  --mono: ui-monospace, "SF Mono", "Cascadia Code", "JetBrains Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --w: 68rem;             /* content column             */
  --pad: 1.25rem;
  --radius: 6px;
}

/* -- reset / base -------------------------------------------------------- */
*, *::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-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;           /* ≥16px base */
  line-height: 1.65;
}
img, svg { max-width: 100%; height: auto; }
a { color: var(--accent); text-underline-offset: .2em; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; border-radius: 2px; }

h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 .6em; font-weight: 650; }
h1 { font-size: clamp(1.9rem, 4.5vw, 3rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); }
h3 { font-size: clamp(1.1rem, 2.2vw, 1.35rem); }
p  { margin: 0 0 1em; max-width: 70ch; }

.mono { font-family: var(--mono); }
.muted { color: var(--muted); }
.accent { color: var(--accent); }

/* ASCII box-drawing divider strip — decorative only */
.divider {
  font-family: var(--mono);
  color: var(--line);
  margin: 3rem 0 0;
  overflow: hidden;
  white-space: nowrap;
  font-size: .8rem;
  line-height: 1.4;
  user-select: none;
}
.section + .divider { margin-top: 0; }

/* -- layout -------------------------------------------------------------- */
.wrap { max-width: var(--w); margin: 0 auto; padding: 0 var(--pad); }
.section { padding: 3.5rem 0 0; }
.section:last-of-type { padding-bottom: 4rem; }
.lede { font-size: 1.15rem; color: var(--muted); max-width: 62ch; }

/* filesystem-path breadcrumbs:  ~/services/seo   */
.crumb { font-family: var(--mono); font-size: .85rem; color: var(--muted); margin: 1.2rem 0 0; }
.crumb a { color: var(--muted); }
.crumb a:hover { color: var(--accent); }
.crumb .here { color: var(--accent); }

/* -- header -------------------------------------------------------------- */
.site-head {
  position: sticky; top: 0; z-index: 50;
  background: rgba(13, 17, 23, .92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}
.site-head .bar {
  max-width: var(--w); margin: 0 auto; padding: .65rem var(--pad);
  display: flex; align-items: center; gap: 1rem;
}
.brand {
  font-family: var(--mono); font-weight: 700; font-size: 1.05rem;
  color: var(--ink); text-decoration: none; letter-spacing: -.02em;
  display: flex; align-items: center; gap: .5rem;
}
.brand .glyph { color: var(--accent); }
.site-nav { margin-left: auto; display: flex; gap: .25rem; align-items: center; }
.site-nav a {
  color: var(--muted); text-decoration: none; font-size: .92rem;
  padding: .5rem .7rem; border-radius: var(--radius);
}
.site-nav a:hover { color: var(--ink); background: var(--panel); }
.site-nav a[aria-current="page"] { color: var(--accent); }
.site-nav a[aria-current="page"]::before { content: "● "; font-size: .5em; vertical-align: .25em; }
.nav-toggle { display: none; }

/* -- buttons ------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  font-family: var(--mono); font-size: .95rem; font-weight: 600;
  text-decoration: none; border-radius: var(--radius);
  padding: .7rem 1.2rem; border: 1px solid var(--line);
  color: var(--ink); background: var(--panel);
  transition: background .15s ease, border-color .15s ease, transform .15s ease;
  min-height: 48px;
}
.btn:hover { background: var(--panel-2); border-color: var(--accent); text-decoration: none; }
.btn-cta { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn-cta:hover { background: #7ef0dd; border-color: #7ef0dd; }
.btn-lg { font-size: 1.05rem; padding: .85rem 1.6rem; }

/* terminal prompt chip:  $ tectostack consult  */
.btn-prompt::before { content: "$ "; color: inherit; opacity: .65; font-weight: 400; }
.btn-cta.btn-prompt::before { color: var(--accent-ink); opacity: .7; }

/* -- stack hero (the brand) ---------------------------------------------- */
.stack-hero { margin: 2.5rem 0 0; }
.stack-plates { display: grid; gap: .5rem; perspective: 900px; }
.plate {
  display: flex; align-items: baseline; gap: 1rem;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  padding: .8rem 1.1rem;
  text-decoration: none; color: var(--ink);
  transform-style: preserve-3d;
  transition: transform .18s ease, border-color .18s ease;
  will-change: transform;
}
.plate + .plate { margin-top: .35rem; }
.plate .idx { font-family: var(--mono); color: var(--muted); font-size: .8rem; min-width: 2.2em; }
.plate .name { font-family: var(--mono); font-weight: 700; font-size: clamp(1rem, 2.4vw, 1.3rem); }
.plate .desc  { color: var(--muted); font-size: .9rem; margin-left: auto; text-align: right; display: none; }
@media (min-width: 55rem) { .plate .desc { display: block; } }
.plate:hover, .plate:focus-visible {
  transform: translateY(-4px);
  border-color: var(--accent);
  text-decoration: none;
}
.stack-plates:hover .plate:not(:hover) { opacity: .75; }

/* formula bar easter egg */
.fx-bar {
  display: flex; align-items: center; gap: .6rem;
  font-family: var(--mono); font-size: .88rem;
  border: 1px solid var(--line); border-left: 3px solid var(--diff-add);
  background: var(--panel); border-radius: var(--radius);
  padding: .55rem .9rem; margin: 1.6rem 0 0; color: var(--muted);
  overflow-x: auto; white-space: nowrap;
}
.fx-bar .fx { color: var(--muted); font-style: italic; }
.fx-bar .ok { color: var(--diff-add); }

/* spreadsheet chrome (column gutters) around a hero block */
.sheet { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; margin: 1.6rem 0 0; }
.sheet-cols {
  display: grid; grid-template-columns: repeat(8, 1fr);
  font-family: var(--mono); font-size: .7rem; color: var(--muted);
  border-bottom: 1px solid var(--line); background: var(--panel);
}
.sheet-cols span { text-align: center; padding: .2rem 0; border-right: 1px solid var(--line); }
.sheet-cols span:last-child { border-right: 0; }
.sheet-body { padding: 1.2rem 1.4rem; }

/* -- terminal-window card ------------------------------------------------ */
.term {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--panel); overflow: hidden;
  display: flex; flex-direction: column;
}
.term-bar {
  display: flex; align-items: center; gap: .45rem;
  background: var(--panel-2); border-bottom: 1px solid var(--line);
  padding: .5rem .8rem;
}
.term-bar i { width: .7rem; height: .7rem; border-radius: 50%; background: var(--line); display: inline-block; }
.term-bar i:nth-child(1) { background: #f8514966; }
.term-bar i:nth-child(2) { background: #d2992266; }
.term-bar i:nth-child(3) { background: #3fb95066; }
.term-title { margin-left: auto; font-family: var(--mono); font-size: .72rem; color: var(--muted); }
.term-body { padding: 1rem 1.1rem; flex: 1; }
.term-prompt { font-family: var(--mono); font-size: .82rem; color: var(--muted); margin: 0 0 .7rem; }
.term-prompt .cmd { color: var(--ink); }
.term-prompt .caret {
  display: inline-block; width: .55em; height: 1.05em; background: var(--accent);
  vertical-align: -.18em; margin-left: .15em;
  animation: caret-blink 1.1s steps(2, start) infinite;
}
@keyframes caret-blink { 50% { opacity: 0; } }
.term-body h3 { margin-top: 0; }
.term-body ul.deliverables { list-style: none; padding: 0; margin: .8rem 0 0; font-family: var(--mono); font-size: .82rem; }
.term-body ul.deliverables li { padding: .15rem 0; color: var(--muted); }
.term-body ul.deliverables li::before { content: "+ "; color: var(--diff-add); font-weight: 700; }

/* card grids */
.grid { display: grid; gap: 1rem; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); }

/* -- bar-chart services grid (the chart IS the menu) ---------------------- */
.chart { display: grid; gap: .55rem; }
.chart-row {
  display: grid; grid-template-columns: minmax(9rem, 16rem) 1fr auto;
  align-items: center; gap: 1rem;
  border: 1px solid transparent; border-radius: var(--radius);
  padding: .45rem .6rem; text-decoration: none; color: var(--ink);
  transition: border-color .15s ease;
}
.chart-row:hover, .chart-row:focus-visible { border-color: var(--line); background: var(--panel); text-decoration: none; }
.chart-row .label { font-family: var(--mono); font-size: .9rem; }
.chart-row .label small { display: block; color: var(--muted); font-size: .72rem; }
.chart-row .track { background: var(--panel); border-radius: 3px; height: 1.15rem; overflow: hidden; border: 1px solid var(--line); }
.chart-row .fill { height: 100%; background: var(--accent); opacity: .85; min-width: 2px; }
.chart-row .val { font-family: var(--mono); font-size: .78rem; color: var(--muted); white-space: nowrap; }
.chart-key { font-family: var(--mono); font-size: .78rem; color: var(--muted); margin-top: .8rem; }

/* -- KPI strip / BI tiles ------------------------------------------------ */
.kpi-strip { display: grid; grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr)); gap: 1rem; }
.kpi {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--panel); padding: .9rem 1rem;
}
.kpi .k { font-family: var(--mono); font-size: .72rem; color: var(--muted); text-transform: uppercase; letter-spacing: .08em; }
.kpi .v { font-family: var(--mono); font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 700; color: var(--accent); line-height: 1.15; margin: .2rem 0; }
.kpi .d { font-family: var(--mono); font-size: .74rem; color: var(--muted); }
.tile {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--panel); padding: 1.1rem 1.2rem;
}
.tile h3 { margin-top: 0; font-size: .95rem; font-family: var(--mono); color: var(--muted); font-weight: 600; }
.tile .big { font-family: var(--mono); font-size: 2rem; font-weight: 700; }

/* -- kanban -------------------------------------------------------------- */
.kanban { display: grid; grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); gap: 1rem; }
.kanban-col { border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); overflow: hidden; }
.kanban-head {
  display: flex; align-items: center; gap: .5rem;
  padding: .55rem .8rem; border-bottom: 1px solid var(--line);
  font-family: var(--mono); font-size: .8rem; background: var(--panel-2);
}
.kanban-head .count { margin-left: auto; color: var(--muted); font-size: .72rem; border: 1px solid var(--line); border-radius: 99px; padding: 0 .5rem; }
.kanban-cards { padding: .6rem; display: grid; gap: .5rem; }
.kanban-card { background: var(--bg); border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: 4px; padding: .5rem .7rem; font-size: .85rem; }
.kanban-card .tag { font-family: var(--mono); font-size: .68rem; color: var(--muted); display: block; }
.kanban-card .tag::before { content: "● "; font-size: .8em; color: var(--diff-mod); }

/* -- composer (build your stack) ----------------------------------------- */
.composer { border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); padding: 1.3rem 1.4rem; }
.composer h3 { margin-top: 0; }
.composer-layers { display: grid; gap: .45rem; margin: 1rem 0; }
.layer-pick { display: flex; align-items: center; gap: .7rem; }
.layer-pick input {
  appearance: none; width: 1.15rem; height: 1.15rem;
  border: 1px solid var(--line); border-radius: 3px; background: var(--bg);
  flex: 0 0 auto; position: relative; cursor: pointer;
}
.layer-pick input:checked { border-color: var(--accent); background: var(--accent); }
.layer-pick input:checked::after {
  content: "✓"; position: absolute; inset: 0; display: grid; place-items: center;
  color: var(--accent-ink); font-size: .8rem; font-weight: 800; font-family: var(--mono);
}
.layer-pick label { cursor: pointer; font-family: var(--mono); font-size: .9rem; }
.layer-pick .why { color: var(--muted); font-size: .78rem; margin-left: auto; display: none; }
@media (min-width: 55rem) { .layer-pick .why { display: inline; } }
.composer .hint { font-family: var(--mono); font-size: .78rem; color: var(--muted); }

/* -- consultation ticket ------------------------------------------------- */
.ticket {
  display: grid; grid-template-columns: auto 1fr;
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  background: var(--panel); text-decoration: none; color: var(--ink);
  transition: border-color .15s ease;
}
.ticket:hover { border-color: var(--accent); text-decoration: none; }
.ticket-stub {
  writing-mode: vertical-rl; transform: rotate(180deg);
  background: var(--accent); color: var(--accent-ink);
  font-family: var(--mono); font-weight: 700; font-size: .8rem;
  padding: 1rem .65rem; letter-spacing: .12em; text-align: center;
  display: flex; align-items: center; justify-content: center;
}
.ticket-body { padding: 1rem 1.2rem; border-left: 2px dashed var(--line); position: relative; }
.ticket-body::before, .ticket-body::after {
  content: ""; position: absolute; left: -7px; width: 12px; height: 12px;
  border-radius: 50%; background: var(--bg); border: 1px solid var(--line);
}
.ticket-body::before { top: -7px; }
.ticket-body::after  { bottom: -7px; }
.ticket-route { font-family: var(--mono); font-weight: 700; font-size: clamp(.95rem, 2vw, 1.2rem); display: flex; align-wrap: wrap; align-items: center; gap: .6rem; flex-wrap: wrap; }
.ticket-route .arrow { color: var(--muted); }
.ticket-meta { font-family: var(--mono); font-size: .75rem; color: var(--muted); margin-top: .4rem; }
.ticket .barcode {
  margin-top: .8rem; height: 1.6rem; border-radius: 2px;
  background: repeating-linear-gradient(90deg, var(--ink) 0 2px, transparent 2px 5px, var(--ink) 5px 6px, transparent 6px 10px);
  opacity: .55;
}

/* -- changelog / deploy cards --------------------------------------------- */
.changelog article {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--panel); padding: 1.1rem 1.3rem; margin-bottom: 1rem;
}
.changelog .ver { font-family: var(--mono); font-weight: 700; color: var(--accent); font-size: 1.05rem; }
.changelog time { font-family: var(--mono); color: var(--muted); font-size: .78rem; margin-left: .6rem; }
.changelog ul.diff { list-style: none; padding: 0; margin: .6rem 0 0; font-family: var(--mono); font-size: .85rem; }
.changelog ul.diff li { padding: .12rem 0; }
.changelog ul.diff li.add::before { content: "+ "; color: var(--diff-add); font-weight: 700; }
.changelog ul.diff li.mod::before { content: "~ "; color: var(--diff-mod); font-weight: 700; }
.changelog ul.diff li.del::before { content: "− "; color: var(--diff-del); font-weight: 700; }
.status-chip {
  display: inline-flex; align-items: center; gap: .4rem;
  font-family: var(--mono); font-size: .72rem; color: var(--diff-add);
  border: 1px solid var(--diff-add); border-radius: 99px; padding: .1rem .6rem;
  vertical-align: middle;
}
.status-chip::before { content: "●"; font-size: .8em; }

/* deploy <details> cards */
details.deploy-card {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--panel); margin-bottom: 1rem;
}
details.deploy-card summary {
  cursor: pointer; padding: .9rem 1.2rem; display: flex; gap: .8rem; align-items: center;
  font-family: var(--mono); list-style: none;
}
details.deploy-card summary::-webkit-details-marker { display: none; }
details.deploy-card summary::after { content: "▾"; margin-left: auto; color: var(--muted); }
details.deploy-card[open] summary::after { content: "▴"; }
details.deploy-card .log { border-top: 1px solid var(--line); padding: 1rem 1.2rem; margin: 0; font-family: var(--mono); font-size: .82rem; color: var(--muted); white-space: pre-wrap; }

/* -- shell-prompt form ---------------------------------------------------- */
.shell { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--panel); }
.shell-bar {
  display: flex; gap: .45rem; align-items: center;
  padding: .55rem .8rem; background: var(--panel-2); border-bottom: 1px solid var(--line);
  font-family: var(--mono); font-size: .75rem; color: var(--muted);
}
.shell-stage { padding: 1.2rem 1.3rem; }
.stage-label { font-family: var(--mono); font-size: .78rem; color: var(--muted); margin-bottom: 1rem; }
.field { margin-bottom: 1rem; }
.field label { display: block; font-family: var(--mono); font-size: .85rem; margin-bottom: .35rem; color: var(--ink); }
.field label::before { content: "$ "; color: var(--accent); }
.field input[type="text"], .field input[type="email"], .field input[type="tel"],
.field select, .field textarea {
  width: 100%; font-family: var(--mono); font-size: .95rem;
  background: var(--bg); color: var(--ink);
  border: 1px solid var(--line); border-radius: 4px; padding: .65rem .8rem;
  min-height: 48px;
}
.field textarea { min-height: 7rem; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--accent); outline: none; }
.field .err { color: var(--diff-del); font-family: var(--mono); font-size: .75rem; margin-top: .3rem; display: none; }
.field.invalid .err { display: block; }
.field.invalid input, .field.invalid select, .field.invalid textarea { border-color: var(--diff-del); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }  /* honeypot */
.checks { display: grid; gap: .45rem; }
.checks .layer-pick input { width: 1rem; height: 1rem; }
.form-nav { display: flex; gap: .6rem; justify-content: space-between; margin-top: 1.2rem; }
.form-note { font-size: .78rem; color: var(--muted); margin-top: 1rem; }
.form-note a { color: var(--muted); text-decoration: underline; }
.shell-progress { display: flex; gap: .4rem; margin-bottom: 1rem; }
.shell-progress span { height: .3rem; flex: 1; background: var(--line); border-radius: 2px; }
.shell-progress span.done { background: var(--accent); }

/* -- sparkline / node graph ---------------------------------------------- */
.spark { display: block; }
.spark polyline { fill: none; stroke: var(--accent); stroke-width: 2; }

.flow { display: flex; flex-wrap: wrap; gap: .7rem; align-items: stretch; margin: 1.4rem 0; }
.flow-node { flex: 1 1 9rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); padding: .8rem 1rem; font-family: var(--mono); font-size: .85rem; }
.flow-node .t { font-size: .68rem; color: var(--muted); text-transform: uppercase; letter-spacing: .08em; display: block; }
.flow-arrow { flex: 0 0 auto; display: grid; place-items: center; color: var(--muted); font-family: var(--mono); padding: 0 .2rem; }
@media (max-width: 45rem) {
  .flow-node { flex: 1 1 100%; }
  .flow-arrow { width: 100%; transform: rotate(90deg); }
}

/* comparison bars (manual vs automated) */
.cmp { margin: 1.2rem 0; }
.cmp .row { display: grid; grid-template-columns: 10rem 1fr 4rem; gap: .8rem; align-items: center; margin-bottom: .5rem; font-size: .85rem; }
.cmp .row .who { font-family: var(--mono); color: var(--muted); }
.cmp .row .bar { height: 1rem; border-radius: 3px; }
.cmp .row.manual .bar { background: var(--diff-del); opacity: .8; }
.cmp .row.auto .bar { background: var(--diff-add); }
.cmp .row .val { font-family: var(--mono); color: var(--muted); text-align: right; }

/* -- FAQ ------------------------------------------------------------------ */
.faq-q { font-family: var(--mono); font-size: 1rem; margin: 1.4rem 0 .4rem; }
.faq-q::before { content: "? "; color: var(--accent); }
.faq-a { color: var(--ink); }
.faq-a:first-line { color: var(--ink); }

/* -- footer --------------------------------------------------------------- */
.site-foot { border-top: 1px solid var(--line); margin-top: 4rem; padding: 2.5rem 0 3rem; font-size: .88rem; }
.foot-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); gap: 1.5rem; }
.site-foot h3 { font-family: var(--mono); font-size: .78rem; text-transform: uppercase; letter-spacing: .1em; color: var(--muted); }
.site-foot ul { list-style: none; padding: 0; margin: 0; }
.site-foot li { padding: .2rem 0; }
.site-foot a { color: var(--muted); text-decoration: none; }
.site-foot a:hover { color: var(--accent); text-decoration: underline; }
.nap { font-family: var(--mono); font-size: .8rem; color: var(--muted); }
.foot-log { font-family: var(--mono); font-size: .72rem; color: var(--muted); margin-top: 2rem; border-top: 1px dashed var(--line); padding-top: 1rem; }

/* -- sticky mobile CTA dock ---------------------------------------------- */
.dock {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 40;
  background: rgba(13,17,23,.96); border-top: 1px solid var(--line);
  padding: .6rem var(--pad); display: none;
}
.dock .btn { width: 100%; justify-content: center; }
@media (max-width: 48rem) { .dock { display: block; } body { padding-bottom: 4.2rem; } }

/* -- helpers -------------------------------------------------------------- */
.skip { position: absolute; left: -9999px; top: 0; background: var(--accent); color: var(--accent-ink); padding: .6rem 1rem; z-index: 100; font-weight: 700; }
.skip:focus { left: 0; }
.center { text-align: center; }
.stack-v { display: grid; gap: 1rem; }
.no-js-hide { display: none; }
.no-js .no-js-hide { display: none; }
.js .no-js-hide { display: block; }