/* =========================================================================
   Caterpillar Frontline Flexibility Portal — Design System
   Brand: Caterpillar Yellow (#FFCD11) + Black. Industrial, bold, high-contrast.
   ========================================================================= */

:root {
  --cat-yellow: #FFCD11;
  --cat-yellow-deep: #F0B400;
  --cat-black: #000000;
  --ink: #1a1a1a;
  --ink-2: #3d3d3d;
  --ink-3: #6b6b6b;
  --line: #e2e2e2;
  --line-2: #cfcfcf;
  --panel: #f5f5f4;
  --panel-2: #ececea;
  --white: #ffffff;
  --steel: #2b2f33;
  --steel-2: #22262a;
  --success: #2e7d46;
  --alert: #c8501e;

  --wrap: 1180px;
  --radius: 4px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.08);
  --shadow-md: 0 6px 22px rgba(0,0,0,.10);
  --shadow-lg: 0 18px 50px rgba(0,0,0,.16);

  --font: "Helvetica Neue", Arial, "Segoe UI", Roboto, system-ui, sans-serif;
  --ease: cubic-bezier(.2,.7,.2,1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  line-height: 1.08;
  margin: 0 0 .5em;
  font-weight: 800;
  letter-spacing: -0.01em;
}
h1 { font-size: clamp(2.1rem, 5vw, 3.6rem); text-transform: uppercase; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.5rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.4rem); }
p { margin: 0 0 1rem; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.section { padding: clamp(48px, 7vw, 96px) 0; }
.section--tight { padding: clamp(36px, 5vw, 64px) 0; }
.section--panel { background: var(--panel); }
.section--dark { background: var(--steel); color: #eef0f1; }
.section--black { background: var(--cat-black); color: #f2f2f2; }
.section--yellow { background: var(--cat-yellow); color: var(--cat-black); }

.eyebrow {
  display: inline-block;
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-2);
  padding-bottom: 10px;
  margin-bottom: 18px;
  border-bottom: 3px solid var(--cat-yellow);
}
.section--dark .eyebrow, .section--black .eyebrow { color: var(--cat-yellow); }
.lead { font-size: clamp(1.05rem, 1.6vw, 1.28rem); color: var(--ink-2); max-width: 62ch; }
.section--dark .lead, .section--black .lead { color: #cfd3d6; }
.center { text-align: center; }
.center .lead, .center .eyebrow { margin-left: auto; margin-right: auto; }
.measure { max-width: 68ch; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .55em;
  font-weight: 800; font-size: .95rem; letter-spacing: .02em;
  padding: 14px 26px; border-radius: var(--radius);
  border: 2px solid var(--cat-black); cursor: pointer;
  transition: transform .15s var(--ease), background .15s var(--ease), color .15s;
  text-transform: uppercase;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--cat-yellow); color: var(--cat-black); border-color: var(--cat-yellow); }
.btn--primary:hover { background: var(--cat-yellow-deep); border-color: var(--cat-yellow-deep); }
.btn--dark { background: var(--cat-black); color: var(--white); }
.btn--dark:hover { background: #222; }
.btn--ghost { background: transparent; color: var(--cat-black); }
.btn--ghost:hover { background: var(--cat-black); color: var(--white); }
.section--dark .btn--ghost, .section--black .btn--ghost { color: #fff; border-color: #fff; }
.section--dark .btn--ghost:hover, .section--black .btn--ghost:hover { background: #fff; color: var(--cat-black); }
.btn-row { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--cat-black); color: #fff;
  border-bottom: 4px solid var(--cat-yellow);
}
.site-header .wrap { max-width: 1320px; }
.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px; gap: 18px;
}
.brand { display: flex; align-items: center; gap: 14px; flex: 0 0 auto; }
.brand__mark {
  font-weight: 900; letter-spacing: .04em;
  background: var(--cat-yellow); color: #000;
  padding: 6px 10px; font-size: 1.05rem; border-radius: 3px;
  transform: skewX(-8deg);
}
.brand__mark span { display: inline-block; transform: skewX(8deg); }
.brand__logo { height: 22px; width: auto; display: block; }
.brand__divider { width: 1px; height: 26px; background: #3a3a3a; display: inline-block; }
.site-footer .brand__divider { background: #333; }
.brand__title {
  font-weight: 700; font-size: .95rem; color: #fff; line-height: 1.15;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.brand__title small { display: block; font-weight: 400; font-size: .72rem; color: #b9bcbf; letter-spacing: .04em; }
.nav__links { display: flex; align-items: center; gap: 4px; }
.nav__links a {
  font-size: .8rem; font-weight: 700; letter-spacing: .02em;
  text-transform: uppercase; color: #d7d9db; white-space: nowrap;
  padding: 10px 11px; border-radius: 3px; transition: color .15s, background .15s;
}
.nav__links a:hover { color: #fff; background: #1c1c1c; }
.nav__links a.active { color: var(--cat-yellow); }
.nav__links a.active::after {
  content: ""; display: block; height: 3px; background: var(--cat-yellow);
  margin-top: 6px; border-radius: 2px;
}
.nav__toggle {
  display: none; background: none; border: 2px solid #444; color: #fff;
  border-radius: 3px; padding: 8px 10px; cursor: pointer; font-size: 1rem;
}
@media (max-width: 1060px) {
  .nav__toggle { display: inline-flex; }
  .nav__links {
    position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--cat-black); border-bottom: 4px solid var(--cat-yellow);
    max-height: 0; overflow: hidden; transition: max-height .3s var(--ease);
  }
  .nav__links.open { max-height: 460px; }
  .nav__links a { padding: 15px 24px; border-top: 1px solid #1f1f1f; }
  .nav__links a.active::after { display: none; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background: var(--cat-black); color: #fff;
  padding: clamp(64px, 10vw, 130px) 0 clamp(56px, 8vw, 110px);
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    repeating-linear-gradient(-45deg, rgba(255,205,17,.06) 0 22px, transparent 22px 44px);
  pointer-events: none;
}
.hero::after {
  content: ""; position: absolute; right: -10%; top: -20%;
  width: 60%; height: 160%;
  background: linear-gradient(135deg, rgba(255,205,17,.16), transparent 60%);
  transform: skewX(-14deg); pointer-events: none;
}
.hero .wrap { position: relative; z-index: 1; }
.hero__kicker {
  display: inline-block; background: var(--cat-yellow); color: #000;
  font-weight: 800; font-size: .78rem; letter-spacing: .16em; text-transform: uppercase;
  padding: 7px 14px; border-radius: 3px; margin-bottom: 22px;
}
.hero h1 { max-width: 18ch; }
.hero h1 em { font-style: normal; color: var(--cat-yellow); }
.hero .lead { color: #d3d6d8; max-width: 56ch; margin-top: 4px; }

/* Page hero (interior, shorter) */
.page-hero { background: var(--cat-black); color: #fff; position: relative; overflow: hidden;
  padding: clamp(48px, 7vw, 88px) 0 clamp(40px, 6vw, 68px); }
.page-hero::after {
  content: ""; position: absolute; right: 0; top: 0; bottom: 0; width: 42%;
  background: linear-gradient(135deg, rgba(255,205,17,.14), transparent 65%);
  transform: skewX(-12deg); transform-origin: top right; pointer-events: none;
}
.page-hero .wrap { position: relative; z-index: 1; }
.page-hero h1 { max-width: 20ch; }
.page-hero .lead { color: #d3d6d8; }
.crumbs { font-size: .8rem; letter-spacing: .06em; text-transform: uppercase; color: #9fa3a6; margin-bottom: 18px; }
.crumbs a:hover { color: var(--cat-yellow); }
.crumbs span { color: var(--cat-yellow); }

/* ---------- Grid & Cards ---------- */
.grid { display: grid; gap: 24px; }
.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; } }

.card {
  background: var(--white); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px;
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), border-color .18s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--line-2); }
.card--flat:hover { transform: none; box-shadow: none; }
.card__num {
  font-weight: 900; font-size: 1.1rem; color: #000;
  background: var(--cat-yellow); width: 40px; height: 40px; border-radius: 3px;
  display: inline-flex; align-items: center; justify-content: center; margin-bottom: 16px;
}
.card__icon {
  width: 54px; height: 54px; border-radius: 10px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--cat-black); color: var(--cat-yellow); margin-bottom: 18px;
}
.card__icon svg { width: 27px; height: 27px; display: block; }
.card--dark .card__icon { background: var(--cat-yellow); color: #000; }
.card h3 { margin-bottom: .35em; }
.card p:last-child { margin-bottom: 0; }
.card--dark { background: var(--steel-2); border-color: #34383c; color: #dfe2e4; }
.card--dark h3 { color: #fff; }
.card--accent { border-top: 4px solid var(--cat-yellow); }

/* Feature list */
.ticks { list-style: none; margin: 0; padding: 0; }
.ticks li { position: relative; padding: 6px 0 6px 30px; color: var(--ink-2); }
.ticks li::before {
  content: "›"; position: absolute; left: 4px; top: 5px;
  color: var(--cat-yellow-deep); font-weight: 900; font-size: 1.15rem;
}
.section--dark .ticks li, .section--black .ticks li { color: #cfd3d6; }

/* ---------- Split / media rows ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(28px, 5vw, 64px); align-items: center; }
.split--media-right { grid-template-columns: 1.05fr .95fr; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }

/* ---------- Stat tiles ---------- */
.stat { text-align: center; padding: 30px 20px; }
.stat__big { font-size: clamp(2.4rem, 5vw, 3.4rem); font-weight: 900; color: var(--cat-black); line-height: 1; }
.section--dark .stat__big, .section--black .stat__big { color: var(--cat-yellow); }
.section--yellow .stat__big { color: #000; }
.stat__label { font-weight: 700; margin-top: 10px; }
.stat__sub { color: var(--ink-3); font-size: .9rem; }
.section--dark .stat__sub { color: #a9adb0; }

/* Bar (before/after) */
.bar-row { display: grid; grid-template-columns: 130px 1fr; gap: 16px; align-items: center; margin: 14px 0; }
.bar-track { background: rgba(0,0,0,.08); border-radius: 3px; height: 30px; position: relative; overflow: hidden; }
.section--dark .bar-track { background: rgba(255,255,255,.12); }
.bar-fill { height: 100%; border-radius: 3px; display: flex; align-items: center; padding-left: 10px;
  font-weight: 800; font-size: .82rem; color: #000; }
.bar-fill--before { background: #9aa0a4; color:#fff; }
.bar-fill--after { background: var(--cat-yellow); }

/* ---------- Video ---------- */
.video-card {
  background: #000; border-radius: var(--radius); overflow: hidden;
  border: 1px solid #2a2a2a; box-shadow: var(--shadow-md);
}
.video-card video { width: 100%; display: block; background: #000; }
.video-card__cap { padding: 14px 18px; color: #d7d9db; font-size: .9rem; background: var(--steel-2); }
.video-card__cap strong { color: #fff; display: block; font-size: .98rem; margin-bottom: 2px; }

/* ---------- Comparison table (white vs blue collar) ---------- */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (max-width: 760px) { .compare { grid-template-columns: 1fr; } }
.compare__col { border-radius: var(--radius); padding: 28px; border: 1px solid var(--line); }
.compare__col--white { background: var(--panel); }
.compare__col--blue { background: #fffdf3; color: var(--ink); border-color: var(--cat-yellow-deep); border-top: 6px solid var(--cat-yellow); }
.compare__col--blue h3 { color: var(--ink); }
.compare__tag { display:inline-block; font-size:.72rem; font-weight:800; letter-spacing:.14em; text-transform:uppercase;
  padding: 5px 10px; border-radius: 3px; margin-bottom: 14px; }
.compare__col--white .compare__tag { background: var(--line); color: var(--ink-2); }
.compare__col--blue .compare__tag { background: var(--cat-black); color: var(--cat-yellow); }

/* ---------- Framework (When/Howmuch/What) ---------- */
.qcard { border-top: 5px solid var(--cat-yellow); }
.qcard .q { font-size: 1.5rem; font-weight: 900; margin-bottom: 4px; }
.chip-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.chip { background: var(--panel); border: 1px solid var(--line); border-radius: 999px;
  padding: 6px 13px; font-size: .84rem; font-weight: 600; color: var(--ink-2); }

/* ---------- Pillars ---------- */
.pillar { text-align:center; padding: 30px 22px; border:1px solid var(--line); border-radius: var(--radius);
  background:#fff; transition: transform .18s var(--ease), box-shadow .18s; }
.pillar:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.pillar__n { font-size:.72rem; font-weight:800; letter-spacing:.16em; color:var(--ink-3); text-transform:uppercase; }
.pillar__icon { width: 62px; height: 62px; border-radius: 50%; background: var(--cat-yellow); color: #000;
  display: flex; align-items: center; justify-content: center; margin: 12px auto 12px; }
.pillar__icon svg { width: 31px; height: 31px; display: block; }

/* ---------- Timeline ---------- */
.timeline { display:grid; grid-template-columns: repeat(5, 1fr); gap: 0; margin-top: 30px; }
@media (max-width: 760px){ .timeline { grid-template-columns: 1fr 1fr; gap: 20px; } }
.tl { position: relative; padding: 26px 14px 0; text-align:center; }
.tl::before { content:""; position:absolute; top:8px; left:0; right:0; height:3px; background:var(--line-2); }
.tl::after { content:""; position:absolute; top:2px; left:50%; transform:translateX(-50%); width:15px; height:15px;
  background:var(--cat-yellow); border:3px solid #000; border-radius:50%; }
.tl__year { font-weight:900; font-size:1.1rem; }
.tl__txt { font-size:.86rem; color:var(--ink-3); }
.section--dark .tl__txt { color:#a9adb0; }
.section--dark .tl::before { background:#454a4e; }

/* ---------- Paths (adopt) ---------- */
.path { border-radius: var(--radius); overflow:hidden; border:1px solid var(--line); background:#fff; display:flex; flex-direction:column; }
.path__head { padding: 26px 28px; color:#000; }
.path__head--1 { background: var(--cat-yellow); }
.path__head--2 { background: var(--cat-black); color:#fff; }
.path__head--2 h3, .path__head--2 .path__k { color:#fff; }
.path__k { font-size:.74rem; font-weight:800; letter-spacing:.14em; text-transform:uppercase; opacity:.8; }
.path__body { padding: 26px 28px; flex:1; }
.path__body h4 { margin-top: 18px; font-size: .8rem; letter-spacing:.08em; text-transform:uppercase; color:var(--ink-3); }

/* ---------- Rollout status ---------- */
.status-legend { display:flex; flex-wrap:wrap; gap:18px; margin: 8px 0 26px; }
.status-legend span { display:inline-flex; align-items:center; gap:8px; font-weight:700; font-size:.88rem; }
.dot { width:12px; height:12px; border-radius:50%; display:inline-block; }
.dot--live { background: var(--success); }
.dot--pending { background: var(--cat-yellow-deep); }
.dot--identified { background: var(--ink-3); }

.rollout-table { width:100%; border-collapse: collapse; font-size:.92rem; }
.rollout-table th, .rollout-table td { text-align:left; padding: 13px 16px; border-bottom:1px solid var(--line); }
.rollout-table th { background: var(--cat-black); color:#fff; font-size:.76rem; letter-spacing:.06em; text-transform:uppercase; }
.rollout-table tbody tr:hover { background: var(--panel); }
.rollout-table td.num { text-align:right; font-variant-numeric: tabular-nums; }
.rollout-table th.mod-col, .rollout-table td.mod { text-align:center; }
.mod-on { display:inline-flex; align-items:center; gap:6px; font-weight:700; font-size:.78rem; color:var(--success); white-space:nowrap; }
.mod-off { color:var(--line-2); }
.pill { display:inline-flex; align-items:center; gap:7px; font-weight:700; font-size:.8rem; padding:4px 10px; border-radius:999px; }
.pill--live { background:#e5f3ea; color:var(--success); }
.pill--pending { background:#fdf2d6; color:#8a6a00; }
.pill--identified { background:#eee; color:var(--ink-2); }
.table-scroll { overflow-x:auto; border:1px solid var(--line); border-radius:var(--radius); }

/* ---------- Placeholder blocks ---------- */
.placeholder {
  border: 2px dashed var(--line-2); border-radius: var(--radius);
  background: repeating-linear-gradient(45deg, #fafafa 0 12px, #f3f3f2 12px 24px);
  padding: 26px; color: var(--ink-3); text-align:center;
}
.placeholder__tag { display:inline-block; font-size:.7rem; font-weight:800; letter-spacing:.14em; text-transform:uppercase;
  background: var(--cat-yellow); color:#000; padding:4px 10px; border-radius:3px; margin-bottom:12px; }
.quote-ph { text-align:left; }
.quote-ph .qmark { font-size:2.4rem; color:var(--line-2); font-weight:900; line-height:.6; }

/* ---------- Callout / powered-by ---------- */
.callout { border-left: 5px solid var(--cat-yellow); background: var(--panel); padding: 22px 26px; border-radius: 0 var(--radius) var(--radius) 0; }
.section--dark .callout, .section--black .callout { background: #22262a; }
.powered {
  display:inline-flex; align-items:center; gap:10px; font-size:.85rem; color:var(--ink-3);
  border:1px solid var(--line); border-radius:999px; padding:7px 16px; background:#fff;
}
.powered b { color: var(--ink); }
.section--dark .powered, .section--black .powered { background:transparent; border-color:#3a3f43; color:#b7bbbe; }
.section--dark .powered b, .section--black .powered b { color:#fff; }

/* ---------- CTA band ---------- */
.cta-band { background: var(--cat-yellow); color:#000; text-align:center; }
.cta-band h2 { max-width: 20ch; margin-inline:auto; }
.cta-band .lead { color:#3a3000; }

/* ---------- Footer ---------- */
.site-footer { background: var(--cat-black); color:#c9cccf; padding: 54px 0 30px; }
.footer-grid { display:grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; }
@media (max-width: 760px){ .footer-grid { grid-template-columns: 1fr; gap:26px; } }
.site-footer h4 { color:#fff; font-size:.82rem; letter-spacing:.1em; text-transform:uppercase; }
.site-footer a { color:#c9cccf; display:block; padding:4px 0; font-size:.92rem; }
.site-footer a:hover { color: var(--cat-yellow); }
.footer-bottom { border-top:1px solid #222; margin-top:36px; padding-top:20px; display:flex; flex-wrap:wrap;
  justify-content:space-between; gap:12px; font-size:.82rem; color:#8b8f92; }
.footer-note { font-size:.8rem; color:#8b8f92; max-width:44ch; }

/* ---------- Reveal on scroll ---------- */
/* Hidden state only applies when JS is active (html.js). If JS is disabled or
   blocked, content stays fully visible — never permanently hidden. */
html.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
html.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html.js .reveal { opacity:1; transform:none; transition:none; }
  html { scroll-behavior: auto; }
}

.section-head { max-width: 60ch; margin-bottom: 40px; }
.section-head.center { margin-inline:auto; }