/* ============================================================
   GHEYCHI PREMIUM — TRADE CATALOGUE SYSTEM
   Seed dd384b0b · direction candidate 5 of 7
   ============================================================ */

/* ---------- 1. TOKENS ---------- */

:root {
  /* Ground & ink. The scene is a phone in daylight, mid-errand —
     a lit page, not a dark console. */
  --paper:        #EFEFEA;
  --paper-2:      #E7E7E0;
  --paper-3:      #DEDED5;
  --ink:          #16160F;
  --ink-2:        #5A5A4E;
  --ink-3:        #66665C;
  --rule:         #C9C9BC;
  --rule-soft:    #DBDBD0;

  /* Signal. One saturated tool-world orange, used at page scale. */
  --signal:       #D63C0B;
  --signal-deep:  #A82C05;
  --signal-wash:  #FBE3DB;

  /* Hazard. Reserved exclusively for restricted-content surfaces. */
  --hazard:       #E0A400;
  --hazard-wash:  #F7EBC7;

  /* Inverted plate */
  --plate:        #16160F;
  --plate-2:      #24241A;
  --plate-ink:    #EFEFEA;
  --plate-ink-2:  #A3A395;
  --plate-rule:   #37372A;

  --ok:           #2C6E45;
  --warn:         #96591A;

  /* Type */
  --sans: 'Archivo', ui-sans-serif, system-ui, -apple-system, 'Helvetica Neue', Arial, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'SFMono-Regular', Menlo, Consolas, monospace;

  /* Measures */
  --gut:      clamp(1.25rem, 4vw, 2.5rem);
  --maxw:     78rem;
  --radius:   3px;

  /* Motion */
  --ease:     cubic-bezier(.16, 1, .3, 1);
  --fast:     140ms;
  --med:      320ms;
  --slow:     620ms;
}

/* ---------- 2. RESET ---------- */

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  /* Browser surfaces belong to the design system. */
  scrollbar-color: var(--rule) var(--paper-2);
  scrollbar-width: thin;
}

@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(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  font-feature-settings: 'kern' 1, 'liga' 1;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--signal); color: #fff; }
:where(a, button, input, textarea, select, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
  border-radius: 1px;
}
:where(input, textarea) { caret-color: var(--signal); }

::-webkit-scrollbar { width: 11px; height: 11px; }
::-webkit-scrollbar-track { background: var(--paper-2); }
::-webkit-scrollbar-thumb { background: var(--rule); border: 3px solid var(--paper-2); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--ink-3); }

img, svg { max-width: 100%; display: block; }
hr { border: 0; border-top: 1px solid var(--rule); margin: 0; }

/* ---------- 3. TYPE SCALE ---------- */

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.02;
  text-wrap: balance;
}

.t-display {
  font-size: clamp(2.75rem, 8.5vw, 5.75rem);
  letter-spacing: -0.045em;
  line-height: .94;
}
.t-h2 { font-size: clamp(1.85rem, 4.2vw, 3rem); letter-spacing: -0.035em; }
.t-h3 { font-size: clamp(1.2rem, 2.2vw, 1.5rem); letter-spacing: -0.02em; line-height: 1.15; }

p { margin: 0; }
.t-lead {
  font-size: clamp(1.0625rem, 1.7vw, 1.25rem);
  line-height: 1.55;
  color: var(--ink-2);
  max-width: 62ch;
}
.t-body { max-width: 70ch; color: var(--ink-2); line-height: 1.68; }
.t-body + .t-body { margin-top: 1.1em; }

/* The catalogue's measurement voice: part numbers, specs, figure labels. */
.spec {
  font-family: var(--mono);
  font-size: .6875rem;
  font-weight: 500;
  letter-spacing: .13em;
  text-transform: uppercase;
  font-variant-numeric: tabular-nums;
  color: var(--ink-3);
}
.spec-ink { color: var(--ink); }
/* Same voice, no shouting — for label strings longer than a few words. */
.spec-plain { text-transform: none; letter-spacing: .01em; font-size: .8125rem; }
.spec-signal { color: var(--signal-deep); }
.num { font-family: var(--mono); font-variant-numeric: tabular-nums; letter-spacing: -0.02em; }

a { color: var(--ink); text-decoration-color: var(--rule); text-underline-offset: .22em; text-decoration-thickness: 1px; }
a:hover { text-decoration-color: var(--signal); }

/* ---------- 4. LAYOUT ---------- */

.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gut); }

/* Ruled section: the catalogue's horizontal registration lines. */
.band { border-top: 1px solid var(--rule); padding-block: clamp(3.5rem, 8vw, 6.5rem); }
.band-tight { padding-block: clamp(2.5rem, 5vw, 3.75rem); }
.band-plate { background: var(--plate); color: var(--plate-ink); border-top-color: var(--plate); }
.band-plate h2, .band-plate h3 { color: var(--plate-ink); }
.band-plate .t-lead, .band-plate .t-body { color: var(--plate-ink-2); }
.band-plate .spec { color: var(--plate-ink-2); }
.band-plate a { color: var(--plate-ink); text-decoration-color: var(--plate-rule); }
.band-signal { background: #B93107; color: #fff; border-top-color: #B93107; }
.band-signal h2, .band-signal .t-lead { color: #fff; }
.band-signal .t-lead { color: #FFE2D8; }
.band-signal .spec { color: #FFE2D8; }

/* Section head: label + rule + heading. No eyebrow above the heading —
   the part number sits inline on the rule, as a catalogue would set it. */
.sec-head { margin-bottom: clamp(1.75rem, 4vw, 2.75rem); }
.sec-rule {
  display: flex; align-items: center; gap: 1rem;
  padding-bottom: .75rem; margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--rule);
}
.band-plate .sec-rule { border-bottom-color: var(--plate-rule); }
.band-signal .sec-rule { border-bottom-color: #D9825E; }
/* The trailing label only moves to the right edge when there is a leading one
   to sit against; a lone label stays where it was set. */
.sec-rule .spec:last-child:not(:first-child) { margin-left: auto; }

.cols { display: grid; gap: clamp(1.5rem, 4vw, 3rem); }
@media (min-width: 900px) {
  .cols-2 { grid-template-columns: 1fr 1fr; }
  .cols-3 { grid-template-columns: repeat(3, 1fr); }
  .cols-hero { grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); align-items: start; gap: clamp(2rem, 5vw, 4rem); }
  .cols-doc { grid-template-columns: 15rem minmax(0, 1fr); gap: clamp(2rem, 6vw, 4.5rem); }
}

/* ---------- 5. NAV ---------- */

.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  border-bottom: 1px solid var(--rule);
}
@supports (backdrop-filter: blur(1px)) { .nav { backdrop-filter: saturate(1.4) blur(9px); } }
.nav-in { display: flex; align-items: center; gap: .75rem; min-height: 60px; }
@media (min-width: 620px) { .nav-in { gap: 1.5rem; } }

.brand { display: inline-flex; align-items: center; gap: .625rem; text-decoration: none; color: var(--ink); min-width: 0; }
.brand svg { width: 22px; height: 22px; flex: none; color: var(--signal); }
.brand > span { font-family: var(--sans); min-width: 0; }
.brand b {
  font-family: var(--sans); font-size: .9375rem; font-weight: 700;
  letter-spacing: -0.025em; display: block; white-space: nowrap;
}
.brand > span > span {
  font-family: var(--mono); font-size: .6875rem; letter-spacing: .16em;
  color: var(--ink-3); text-transform: uppercase; display: none; white-space: nowrap;
}
/* The strapline only earns its space once the bar is not fighting for room. */
@media (min-width: 620px) { .brand > span > span { display: block; } }
@media (max-width: 420px) { .brand b { font-size: .875rem; } }

.nav-links { display: none; margin-left: auto; gap: 1.75rem; }
@media (min-width: 860px) { .nav-links { display: flex; } }
.nav-links a {
  font-size: .875rem; font-weight: 500; text-decoration: none; color: var(--ink-2);
  padding-block: .35rem; border-bottom: 2px solid transparent; transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}
.nav-links a:hover { color: var(--ink); border-bottom-color: var(--rule); }
.nav-links a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--signal); }
.nav-cta { margin-left: auto; white-space: nowrap; }
@media (min-width: 860px) { .nav-cta { margin-left: 0; } }
@media (max-width: 480px) { .nav-cta { padding: .5rem .75rem; font-size: .8125rem; } }

.nav-toggle {
  margin-left: auto; display: inline-grid; place-items: center;
  width: 38px; height: 38px; padding: 0;
  background: transparent; border: 1px solid var(--rule); border-radius: var(--radius);
  color: var(--ink); cursor: pointer;
}
@media (min-width: 860px) { .nav-toggle { display: none; } }
.nav-drawer { display: none; border-top: 1px solid var(--rule); background: var(--paper); padding-block: .5rem 1rem; }
.nav-drawer.open { display: block; }
@media (min-width: 860px) { .nav-drawer { display: none !important; } }
.nav-drawer a {
  display: block; padding: .875rem 0; text-decoration: none;
  font-weight: 500; color: var(--ink); border-bottom: 1px solid var(--rule-soft);
}
.nav-drawer a:last-child { border-bottom: 0; }

/* ---------- 6. BUTTONS ---------- */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  font-family: var(--sans); font-size: .875rem; font-weight: 600; letter-spacing: -0.005em;
  padding: .6875rem 1.125rem; border-radius: var(--radius); white-space: nowrap;
  border: 1px solid transparent; cursor: pointer; text-decoration: none;
  transition: background var(--fast) var(--ease), color var(--fast) var(--ease),
              border-color var(--fast) var(--ease), transform var(--fast) var(--ease),
              box-shadow var(--fast) var(--ease);
}
.btn svg { width: 17px; height: 17px; flex: none; }
.btn:active { transform: translateY(1px); }

.btn-signal { background: var(--signal); color: #fff; box-shadow: 0 1px 2px rgba(22,22,15,.18); }
.btn-signal:hover { background: var(--signal-deep); box-shadow: 0 3px 10px rgba(184,49,7,.28); }

.btn-ink { background: var(--ink); color: var(--paper); }
.btn-ink:hover { background: var(--plate-2); }

.btn-line { background: transparent; color: var(--ink); border-color: var(--rule); }
.btn-line:hover { border-color: var(--ink); background: var(--paper-2); }

.btn-onplate { background: var(--paper); color: var(--ink); }
.btn-onplate:hover { background: #fff; }
.btn-onplate-line { background: transparent; color: var(--plate-ink); border-color: var(--plate-rule); }
.btn-onplate-line:hover { border-color: var(--plate-ink-2); background: rgba(255,255,255,.05); }

.btn-onsignal { background: #fff; color: var(--signal-deep); }
.btn-onsignal:hover { background: var(--paper); }

.btn-lg { font-size: .9375rem; padding: .875rem 1.5rem; }
@media (max-width: 420px) { .btn-lg { font-size: .875rem; padding: .8125rem 1.125rem; } }
.btn-sm { font-size: .8125rem; padding: .5rem .875rem; }
.btn:disabled, .btn[aria-disabled="true"] { opacity: .45; pointer-events: none; }

/* ---------- 7. SPEC TABLE — the catalogue's core component ---------- */

.specs { border-top: 1px solid var(--rule); }
/* A spec table straight after a section rule would double the hairline. */
.sec-rule + .specs, .sec-rule + * > .specs:first-child { border-top: 0; }
.stack > .sec-rule + .specs { border-top: 0; }
.spec-row {
  display: flex; align-items: baseline; gap: .75rem;
  padding: .8125rem 0; border-bottom: 1px solid var(--rule-soft);
}
.spec-row dt { font-size: .875rem; font-weight: 500; color: var(--ink-2); flex: none; margin: 0; }
.spec-row .leader { flex: 1 1 auto; border-bottom: 1px dotted var(--rule); transform: translateY(-.2em); min-width: 1.5rem; }
.spec-row dd {
  margin: 0; flex: none; font-family: var(--mono); font-size: .875rem; font-weight: 500;
  font-variant-numeric: tabular-nums; color: var(--ink); letter-spacing: -0.02em;
}
.band-plate .specs { border-top-color: var(--plate-rule); }
.band-plate .spec-row { border-bottom-color: var(--plate-rule); }
.band-plate .spec-row dt { color: var(--plate-ink-2); }
.band-plate .spec-row dd { color: var(--plate-ink); }
.band-plate .spec-row .leader { border-bottom-color: var(--plate-rule); }

/* ---------- 8. FIGURE / DIAGRAM PLATE ---------- */

.plate {
  position: relative; background: var(--paper-2);
  border: 1px solid var(--rule); border-radius: var(--radius);
  padding: clamp(1.25rem, 3vw, 2rem);
}
.plate-caption {
  display: flex; justify-content: space-between; gap: 1rem;
  margin-top: .875rem; padding-top: .6875rem; border-top: 1px solid var(--rule);
}

/* Dimension line that draws itself once, on entry. One authored moment. */
.dim line, .dim path, .dim polyline {
  stroke-dasharray: var(--len, 600); stroke-dashoffset: var(--len, 600);
}
.dim.drawn line, .dim.drawn path, .dim.drawn polyline {
  animation: draw var(--slow) var(--ease) forwards;
}
.dim.drawn [data-delay="1"] { animation-delay: 90ms; }
.dim.drawn [data-delay="2"] { animation-delay: 180ms; }
.dim.drawn [data-delay="3"] { animation-delay: 270ms; }
.dim.drawn [data-delay="4"] { animation-delay: 360ms; }
@keyframes draw { to { stroke-dashoffset: 0; } }

.fig-label { font-family: var(--mono); font-size: 9.5px; letter-spacing: .1em; text-transform: uppercase; fill: var(--ink-3); }
.fig-value { font-family: var(--mono); font-size: 11px; font-weight: 600; fill: var(--ink); }

/* ---------- 9. STEP SEQUENCE ---------- */

.steps { border-top: 1px solid var(--rule); }
.step {
  display: grid; gap: .3125rem; padding: 1.5rem 0;
  border-bottom: 1px solid var(--rule-soft);
}
.step h3 { font-size: 1.0625rem; letter-spacing: -0.02em; }
.step p { color: var(--ink-2); font-size: .9375rem; max-width: 58ch; }

/* ---------- 10. CAPABILITY LIST (not a card grid) ---------- */

.caps { border-top: 1px solid var(--rule); }
.cap {
  display: grid; gap: .375rem 1.5rem; padding: 1.375rem 0;
  border-bottom: 1px solid var(--rule-soft); align-items: start;
}
@media (min-width: 780px) { .cap { grid-template-columns: 1.75rem 15rem 1fr; align-items: baseline; } }
.cap-icon { color: var(--signal); }
.cap-icon svg { width: 20px; height: 20px; }
.cap h3 { font-size: 1rem; letter-spacing: -0.02em; }
.cap p { color: var(--ink-2); font-size: .9375rem; max-width: 62ch; }
.band-plate .caps { border-top-color: var(--plate-rule); }
.band-plate .cap { border-bottom-color: var(--plate-rule); }
.band-plate .cap p { color: var(--plate-ink-2); }

/* ---------- 11. RESTRICTED PLATE — hazard register, used once ---------- */

.restricted {
  border: 1px solid var(--hazard); border-radius: var(--radius);
  background: var(--hazard-wash); padding: clamp(1.25rem, 3vw, 1.75rem);
  position: relative; overflow: hidden;
}
.restricted::before {
  content: ''; position: absolute; inset-inline: 0; top: 0; height: 4px;
  background: repeating-linear-gradient(-45deg, var(--hazard) 0 8px, transparent 8px 16px);
}
.restricted .spec { color: var(--warn); }
.restricted p { color: #4A3A12; }

/* ---------- 12. PRICING ---------- */

.tiers { display: grid; gap: 0; border-top: 1px solid var(--rule); }
@media (min-width: 940px) { .tiers { grid-template-columns: repeat(4, 1fr); border-left: 1px solid var(--rule); } }
.tier {
  padding: 1.75rem clamp(1rem, 2.5vw, 1.5rem);
  border-bottom: 1px solid var(--rule);
  display: flex; flex-direction: column; gap: 1rem;
}
@media (min-width: 940px) { .tier { border-right: 1px solid var(--rule); border-bottom: 0; } }
.tier-mark { background: var(--signal-wash); }
.tier-price { display: flex; align-items: baseline; gap: .25rem; }
.tier-price .amt { font-family: var(--mono); font-size: 2.5rem; font-weight: 700; letter-spacing: -0.05em; }
.tier-price .per { font-size: .8125rem; color: var(--ink-3); }
.tier ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .5rem; }
.tier li { display: flex; gap: .5rem; font-size: .875rem; color: var(--ink-2); align-items: baseline; }
.tier li svg { width: 13px; height: 13px; flex: none; color: var(--signal); transform: translateY(1px); }
.tier .btn { margin-top: auto; }

/* ---------- 13. ROADMAP ---------- */

.road { border-top: 1px solid var(--rule); }
.road-item {
  display: grid; gap: .5rem 1.5rem; padding: 1.5rem 0;
  border-bottom: 1px solid var(--rule-soft);
}
@media (min-width: 780px) { .road-item { grid-template-columns: 7rem 1fr 8rem; align-items: baseline; } }
.tag {
  display: inline-flex; align-items: center; gap: .375rem; align-self: start;
  font-family: var(--mono); font-size: .6875rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase;
  padding: .25rem .5rem; border-radius: 2px; border: 1px solid;
}
.tag-done   { color: var(--ok);     border-color: color-mix(in srgb, var(--ok) 35%, transparent);     background: color-mix(in srgb, var(--ok) 8%, transparent); }
.tag-active { color: var(--signal-deep); border-color: color-mix(in srgb, var(--signal) 38%, transparent); background: var(--signal-wash); }
.tag-next   { color: var(--ink-3);  border-color: var(--rule); background: transparent; }

/* ---------- 14. PROSE (legal / long-form) ---------- */

.prose { max-width: 68ch; }
.prose h2 { font-size: 1.375rem; letter-spacing: -0.025em; margin-top: 2.5rem; margin-bottom: .75rem; }
.prose h2:first-child { margin-top: 0; }
.prose p, .prose li { color: var(--ink-2); line-height: 1.7; font-size: .9375rem; }
.prose p + p { margin-top: 1em; }
.prose ul { margin: 1em 0; padding-left: 1.1rem; display: grid; gap: .5rem; }
.prose strong { color: var(--ink); font-weight: 600; }

.toc { position: sticky; top: 84px; align-self: start; display: none; }
@media (min-width: 900px) { .toc { display: block; } }
.toc a {
  display: block; padding: .375rem 0 .375rem .75rem; font-size: .8125rem;
  color: var(--ink-2); text-decoration: none; border-left: 1px solid var(--rule);
}
.toc a:hover { color: var(--ink); border-left-color: var(--signal); }

/* ---------- 15. CONTACT ---------- */

.channel {
  display: grid; gap: .5rem 1.25rem; grid-template-columns: 2rem 1fr auto;
  padding: 1.375rem 0; border-bottom: 1px solid var(--rule-soft); align-items: center;
}
.channel:first-child { border-top: 1px solid var(--rule); }
.channel svg { width: 20px; height: 20px; color: var(--signal); }
.channel h3 { font-size: 1rem; }
.channel p { grid-column: 2; font-size: .875rem; color: var(--ink-2); }

/* ---------- 16. FOOTER ---------- */

.foot { border-top: 1px solid var(--rule); background: var(--paper-2); padding-block: clamp(2.5rem, 5vw, 3.5rem); }
.foot-grid { display: grid; gap: 2rem; }
@media (min-width: 780px) { .foot-grid { grid-template-columns: 2fr 1fr 1fr 1fr; gap: 3rem; } }
.foot .foot-title { font-family: var(--mono); font-size: .6875rem; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-3); margin-bottom: .875rem; }
.foot-col a { display: block; padding: .3125rem 0; font-size: .875rem; color: var(--ink-2); text-decoration: none; }
.foot-col a:hover { color: var(--signal-deep); }
.foot-note { color: var(--ink-2); font-size: .875rem; max-width: 34ch; margin-top: .75rem; }
.foot-base {
  display: flex; flex-wrap: wrap; gap: .75rem 1.5rem; justify-content: space-between;
  margin-top: 2.5rem; padding-top: 1.25rem; border-top: 1px solid var(--rule);
}

/* ---------- 17. UTILITIES ---------- */

.stack   { display: grid; gap: 1rem; align-content: start; }
.stack-s { display: grid; gap: .5rem; align-content: start; }
.stack-l { display: grid; gap: 1.75rem; align-content: start; }
.row     { display: flex; flex-wrap: wrap; gap: .75rem; align-items: center; }
.mt-l    { margin-top: clamp(1.75rem, 4vw, 2.75rem); }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.chips { display: flex; flex-wrap: wrap; gap: .375rem; }
.chip {
  font-family: var(--mono); font-size: .6875rem; letter-spacing: .04em;
  padding: .3125rem .5625rem; border: 1px solid var(--rule); border-radius: 2px;
  color: var(--ink-2); background: var(--paper);
}
.band-plate .chip { border-color: var(--plate-rule); background: transparent; color: var(--plate-ink-2); }

/* Entry: content is visible by default; the reveal only refines it. */
.rise { opacity: 1; }
@media (prefers-reduced-motion: no-preference) {
  .js .rise { opacity: 0; transform: translateY(14px); transition: opacity var(--med) var(--ease), transform var(--med) var(--ease); }
  .js .rise.in { opacity: 1; transform: none; }
}