/* ============================================================
   FactoryView — shared site styles
   IBM Plex Sans / Serif / Mono · warm paper + ink + safety orange
============================================================ */

:root {
  --paper:       #F4EFE7;
  --paper-2:     #EBE4D6;
  --paper-3:     #DDD4BE;
  --rule-soft:   #C8BFAD;
  --rule:        #2A2620;
  --ink:         #15130E;
  --ink-2:       #3B362C;
  --ink-3:       #6B6253;
  --ink-4:       #8A8170;
  --accent:      #C76A3C;
  --accent-deep: #8E4521;
  --accent-soft: #E6B89B;
  --good:        #3F6B3A;
  --warn:        #B8762B;
  --bad:         #8A2A20;

  --container:   1240px;
  --gutter:      56px;
  --gutter-sm:   24px;

  --t-display-xl: clamp(48px, 7.4vw, 104px);
  --t-display-l:  clamp(38px, 5vw, 68px);
  --t-display-m:  clamp(30px, 3.6vw, 46px);
  --t-display-s:  clamp(22px, 2.4vw, 30px);
  --t-body-l:     20px;
  --t-body:       17px;
  --t-small:      14px;
  --t-micro:      11px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { background: var(--paper); }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: "IBM Plex Sans", system-ui, -apple-system, sans-serif;
  font-size: var(--t-body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; }

/* ---------- containers ---------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
@media (max-width: 760px) {
  .container { padding: 0 var(--gutter-sm); }
}

/* ---------- type helpers ---------- */
.serif-i { font-family: "IBM Plex Serif", serif; font-style: italic; font-weight: 400; }
.mono {
  font-family: "IBM Plex Mono", monospace;
  font-size: var(--t-micro);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.mono-label {
  font-family: "IBM Plex Mono", monospace;
  font-size: var(--t-micro);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.h-display-xl {
  font-size: var(--t-display-xl);
  font-weight: 600;
  line-height: 0.96;
  letter-spacing: -0.03em;
  margin: 0;
  text-wrap: balance;
}
.h-display-l {
  font-size: var(--t-display-l);
  font-weight: 600;
  line-height: 1.0;
  letter-spacing: -0.025em;
  margin: 0;
  text-wrap: balance;
}
.h-display-m {
  font-size: var(--t-display-m);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0;
  text-wrap: balance;
}
.h-display-s {
  font-size: var(--t-display-s);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 0;
  text-wrap: balance;
}
.lede {
  font-size: var(--t-body-l);
  line-height: 1.5;
  color: var(--ink-2);
  max-width: 640px;
  margin: 0;
  text-wrap: pretty;
}
.lede-narrow { max-width: 560px; }
.lede-wide   { max-width: 760px; }

em.accent { color: var(--accent-deep); font-family: "IBM Plex Serif", serif; font-style: italic; font-weight: 400; }
.dark em.accent { color: var(--accent); }

/* ---------- navigation ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(244,239,231,0.88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule-soft);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav .logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
}
.nav .logo img {
  height: 26px;
  width: auto;
  display: block;
}
.nav .nav-links {
  display: flex; align-items: center; gap: 28px;
}
.nav .nav-links a {
  text-decoration: none;
  color: var(--ink-2);
  font-size: 15px;
  font-weight: 500;
}
.nav .nav-links a:hover { color: var(--ink); }
.nav .nav-cta {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 16px;
  background: var(--ink); color: var(--paper);
  font-size: 14px; font-weight: 500;
  text-decoration: none;
  letter-spacing: -0.005em;
  border: 1.5px solid var(--ink);
  transition: background 120ms ease;
}
.nav .nav-cta:hover { background: var(--accent-deep); border-color: var(--accent-deep); }
@media (max-width: 760px) {
  .nav .nav-links { display: none; }
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px;
  font-size: 15px; font-weight: 500;
  background: var(--ink); color: var(--paper);
  border: 1.5px solid var(--ink);
  text-decoration: none;
  letter-spacing: -0.005em;
  transition: background 120ms ease, transform 120ms ease;
  cursor: pointer;
}
.btn:hover { background: var(--accent-deep); border-color: var(--accent-deep); }
.btn.ghost {
  background: transparent; color: var(--ink); border-color: var(--ink);
}
.btn.ghost:hover { background: var(--ink); color: var(--paper); }
.dark .btn { background: var(--accent); color: var(--ink); border-color: var(--accent); }
.dark .btn:hover { background: var(--paper); border-color: var(--paper); color: var(--ink); }
.dark .btn.ghost { background: transparent; color: var(--paper); border-color: rgba(244,239,231,0.55); }
.dark .btn.ghost:hover { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.btn .arrow {
  display: inline-block;
  width: 18px; height: 1.5px;
  background: currentColor; position: relative;
}
.btn .arrow::after {
  content: ""; position: absolute; right: 0; top: -3px;
  width: 8px; height: 8px;
  border-right: 1.5px solid currentColor;
  border-top: 1.5px solid currentColor;
  transform: rotate(45deg);
}

/* ---------- sections / bands ---------- */
.band {
  padding: 120px 0;
  border-bottom: 1px solid var(--rule-soft);
}
.band.tight { padding: 80px 0; }
.band.snug  { padding: 56px 0; }
.band:last-of-type { border-bottom: none; }
@media (max-width: 760px) {
  .band { padding: 72px 0; }
  .band.tight { padding: 56px 0; }
  .band.snug  { padding: 40px 0; }
}

.band.paper-2 { background: var(--paper-2); }
.band.dark    { background: var(--ink); color: var(--paper); border-bottom-color: var(--ink); }
.band.dark .lede { color: rgba(244,239,231,0.78); }
.band.dark .mono-label { color: rgba(244,239,231,0.55); }
.band.dark em.accent { color: var(--accent); }

.eyebrow {
  font-family: "IBM Plex Mono", monospace;
  font-size: var(--t-micro);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-deep);
  margin-bottom: 28px;
  display: flex; align-items: center; gap: 12px;
}
.eyebrow::before {
  content: ""; display: inline-block;
  width: 28px; height: 1px; background: var(--accent);
}
.dark .eyebrow { color: var(--accent); }
.dark .eyebrow::before { background: var(--accent); }

.section-head {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 56px;
  margin-bottom: 56px;
  align-items: baseline;
}
.section-head .label-col .mono-label { margin-bottom: 6px; }
.section-head .label-col .step-no {
  font-family: "IBM Plex Mono", monospace;
  font-size: 13px; color: var(--ink-3);
  letter-spacing: 0.12em;
}
@media (max-width: 880px) {
  .section-head { grid-template-columns: 1fr; gap: 12px; }
}

/* ---------- footer ---------- */
.site-footer {
  background: var(--ink);
  color: var(--paper);
  padding: 80px 0 32px;
}
.site-footer a { color: var(--paper); text-decoration: none; }
.site-footer a:hover { color: var(--accent); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 56px;
  border-bottom: 1px solid rgba(244,239,231,0.18);
}
@media (max-width: 880px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 540px) {
  .footer-grid { grid-template-columns: 1fr; }
}
.footer-grid h5 {
  font-family: "IBM Plex Mono", monospace;
  font-size: var(--t-micro);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 18px;
  font-weight: 500;
}
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: 10px; font-size: 15px; }
.footer-grid li a { color: rgba(244,239,231,0.78); }
.footer-grid li a:hover { color: var(--accent); }
.footer-grid .brand-col {
  font-size: 15px; line-height: 1.5; color: rgba(244,239,231,0.78); max-width: 320px;
}
.footer-grid .brand-col .footer-logo {
  display: inline-block;
  margin-bottom: 18px;
}
.footer-grid .brand-col .footer-logo img {
  height: 28px;
  width: auto;
  display: block;
}
.site-footer .legal {
  padding-top: 32px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px;
  font-family: "IBM Plex Mono", monospace;
  font-size: var(--t-micro);
  letter-spacing: 0.14em; text-transform: uppercase;
  color: rgba(244,239,231,0.5);
}

/* ---------- shared text-only patterns ---------- */
.text-cols-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; }
@media (max-width: 880px) { .text-cols-2 { grid-template-columns: 1fr; gap: 28px; } }

.rule-h { width: 100%; height: 1px; background: var(--rule-soft); margin: 32px 0; }
.dark .rule-h { background: rgba(244,239,231,0.2); }

/* ---------- utility ---------- */
.hide-mobile { display: initial; }
.show-mobile { display: none; }
@media (max-width: 760px) {
  .hide-mobile { display: none; }
  .show-mobile { display: initial; }
}