/* Rack Labs landing. Tokens follow pipeplot's landing (dark page, Archivo
   display, Noto Sans KR body, IBM Plex Mono for figures). The one device of
   this page is the sheet: every figure sits on a paper-white drawing sheet,
   which marks it as a technical figure and keeps the white-background
   images from the business plan readable on the dark page. */
:root {
  color-scheme: dark;
  --bg: #0b0d10;
  --bg2: #11151b;
  --line: #2a3340;
  --ink: #e6eaf0;
  --body: #cfd6e0;
  --dim: #9aa4b2;
  --muted: #64748b;
  --faint: #3d4654;
  --tint: #8fbcbc;
  --sheet: #f4f5f7;
  --sheet-ink: #1b1f24;
  --sheet-dim: #5b6470;
  --sheet-line: #dfe3e8;
  --display: 'Archivo', 'Noto Sans KR', 'Malgun Gothic', system-ui, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, Consolas, 'Malgun Gothic', monospace;
  --gutter: clamp(16px, 4vw, 56px);
  --wing: clamp(64px, 10vh, 140px);
  --radius: 6px;
  --pill: 999px;
}

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--body);
  font: 16px/1.65 var(--display);
  word-break: keep-all;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
h1, h2, h3 { margin: 0; color: var(--ink); font-weight: 500; }
img, video { display: block; max-width: 100%; height: auto; }
:focus-visible { outline: 1px solid var(--tint); outline-offset: 3px; border-radius: var(--radius); }

/* top bar: transparent over the hero, solid once scrolled past it (JS) */
.bar {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  height: 60px; padding: 0 var(--gutter); margin-bottom: -60px;
  font: 14px/1 var(--mono); letter-spacing: .04em;
  border-bottom: 1px solid transparent;
  transition: background 240ms ease, border-color 240ms ease;
}
.bar.solid { background: rgba(11, 13, 16, .78); backdrop-filter: blur(10px); border-color: var(--line); }
.bar .brand { color: var(--ink); font: 600 17px/1 var(--display); letter-spacing: .18em; white-space: nowrap; }
.bar nav { display: flex; gap: clamp(16px, 3vw, 32px); overflow-x: auto; white-space: nowrap; }
.bar nav a { color: var(--dim); padding: 6px 0; }
.bar nav a:hover { color: var(--ink); }

/* shared copy pieces */
.kicker {
  margin: 0 0 18px;
  font: 13px/1.4 var(--mono); letter-spacing: .06em; color: var(--tint);
}
.lede { margin: 0; color: var(--body); font-size: clamp(16px, 1.3vw, 18px); line-height: 1.6; max-width: 46ch; }
.cta { display: flex; gap: 14px; margin-top: 32px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; padding: 12px 20px;
  font: 500 14px/1 var(--display); letter-spacing: .02em;
  border: 1px solid var(--ink); color: var(--ink); border-radius: var(--pill);
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease;
}
.btn:hover { background: var(--ink); color: var(--bg); }
.btn.ghost { border-color: var(--line); color: var(--dim); }
.btn.ghost:hover { background: transparent; color: var(--ink); border-color: var(--dim); }

/* the sheet: a paper-white plate for figures */
.sheet {
  margin: 0; padding: clamp(14px, 2vw, 24px);
  background: var(--sheet); color: var(--sheet-ink);
  border-radius: var(--radius);
  box-shadow: 0 1px 0 rgba(255, 255, 255, .08) inset, 0 20px 50px -30px rgba(0, 0, 0, .9);
}
.sheet img { width: 100%; height: auto; }
.sheet figcaption {
  margin: 12px 0 0; padding-top: 10px;
  border-top: 1px solid var(--sheet-line);
  font-size: 13px; line-height: 1.5; color: var(--sheet-dim);
}

/* hero: the rig drawing is the background (assets/rig-dark.webp, the
   business-plan figure recoloured for the dark page); the veil keeps the
   copy legible over it */
.hero {
  position: relative; min-height: 100svh; box-sizing: border-box;
  display: grid; grid-template-columns: 1fr; align-items: end;
  padding: 100px var(--gutter) clamp(40px, 8vh, 96px);
  overflow: hidden; isolation: isolate;
}
.hero .poster {
  position: absolute; inset: 0; z-index: -2; pointer-events: none;
  display: flex; justify-content: flex-end; align-items: center;
  padding: 72px calc(var(--gutter) * .5) 0 0;
}
.hero .poster img {
  width: min(64vw, 118vh); max-width: 1180px; height: auto; opacity: .92;
}
.hero .veil {
  position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background:
    linear-gradient(180deg, rgba(11,13,16,.5) 0%, rgba(11,13,16,0) 28%, rgba(11,13,16,0) 58%, rgba(11,13,16,.9) 100%),
    linear-gradient(90deg, rgba(11,13,16,.75) 0%, rgba(11,13,16,.25) 45%, rgba(11,13,16,0) 70%);
}
.hero::before {
  /* the faint grid of the rig drawing, carried onto the page */
  content: ''; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(var(--bg2) 1px, transparent 1px),
    linear-gradient(90deg, var(--bg2) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,.9), transparent 85%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,.9), transparent 85%);
}
.hero .copy { max-width: 880px; }
.hero h1 {
  font-size: clamp(44px, 6.6vw, 104px); line-height: .94; letter-spacing: -.01em;
  font-variation-settings: 'wdth' 82; text-wrap: balance;
}
.hero .lede { margin-top: 22px; }
.hero .cue {
  position: absolute; right: var(--gutter); bottom: 20px;
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  font: 11px/1 var(--mono); letter-spacing: .18em; text-transform: uppercase; color: var(--muted);
}
.hero .cue i {
  display: block; width: 1px; height: 48px;
  background: linear-gradient(var(--muted), transparent); animation: cue 2.2s ease-in-out infinite;
}
@keyframes cue {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}
@media (prefers-reduced-motion: reduce) { .hero .cue i { animation: none; } }

/* wings: the two product sections */
.wing { padding: var(--wing) var(--gutter); border-top: 1px solid var(--line); }
.head {
  display: flex; align-items: baseline; justify-content: space-between; gap: 16px 32px; flex-wrap: wrap;
  margin-bottom: clamp(28px, 4vh, 48px);
}
.head h2 { font-size: clamp(32px, 4.2vw, 60px); line-height: 1; letter-spacing: -.01em; font-variation-settings: 'wdth' 86; }
.head p { margin: 0; color: var(--dim); font-size: 15px; }
.cols { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); gap: clamp(32px, 5vw, 80px); align-items: start; }
.text p + p { margin-top: 16px; }
.text > p:not(.lede) { max-width: 54ch; color: var(--dim); }
.figs { display: grid; gap: 20px; }
.figs .sheet:nth-child(2) { max-width: 320px; }

/* facts: a definition list with hairlines, value large */
.facts { margin: 36px 0 0; padding: 0; border-top: 1px solid var(--line); max-width: 560px; }
.facts > div {
  display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px 24px; align-items: baseline;
  padding: 14px 0; border-bottom: 1px solid var(--line);
}
.facts dt { margin: 0; color: var(--dim); font-size: 14px; }
.facts dd { margin: 0; text-align: right; color: var(--ink); font-size: 22px; line-height: 1.2; font-variation-settings: 'wdth' 90; }
.facts dd small { display: block; margin-top: 4px; font: 12px/1.4 var(--mono); color: var(--muted); }

/* timeline: the one true sequence on the page */
.timeline {
  list-style: none; margin: clamp(40px, 6vh, 72px) 0 0; padding: 0;
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px;
}
.timeline li { padding-top: 14px; border-top: 1px solid var(--line); position: relative; }
.timeline li::before {
  content: ''; position: absolute; top: -4px; left: 0; width: 7px; height: 7px; border-radius: 50%;
  background: var(--faint);
}
.timeline li:first-child::before { background: var(--tint); }
.timeline .when { display: block; font: 13px/1.4 var(--mono); color: var(--ink); margin-bottom: 6px; }
.timeline .what { display: block; font-size: 14px; color: var(--dim); max-width: 30ch; }

/* pipeplot: its own hero, carried over as is */
.pp {
  position: relative; min-height: 100svh; box-sizing: border-box; display: grid; align-items: end;
  padding: 100px var(--gutter) clamp(40px, 8vh, 96px); overflow: hidden; isolation: isolate;
  border-top: 1px solid var(--line);
}
.pp .poster {
  position: absolute; inset: 0; z-index: -2;
  background: radial-gradient(70% 55% at 68% 42%, rgba(143, 188, 188, .10), transparent 70%);
}
.pp .poster video, .pp .poster img, .pp .poster canvas.live { width: 100%; height: 100%; object-fit: cover; opacity: .9; }
.pp .poster canvas.live { position: absolute; inset: 0; pointer-events: none; display: block; }
.pp .poster .dip { position: absolute; inset: 0; pointer-events: none; opacity: 0; background: var(--bg); }
.pp .poster video[hidden] { display: none; }
.pp .veil {
  position: absolute; inset: 0; z-index: -1;
  background:
    linear-gradient(180deg, rgba(11,13,16,.55) 0%, rgba(11,13,16,0) 30%, rgba(11,13,16,0) 55%, rgba(11,13,16,.92) 100%),
    linear-gradient(90deg, rgba(11,13,16,.55) 0%, rgba(11,13,16,0) 50%);
}
.pp .copy { max-width: 880px; }
.pp h2 {
  font-size: clamp(40px, 6vw, 96px); line-height: .94; letter-spacing: -.01em;
  font-variation-settings: 'wdth' 82; text-wrap: balance;
}
.pp .lede { margin-top: 22px; }
.pp .lede + .lede { margin-top: 14px; color: var(--dim); }

/* footer */
.foot {
  display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); gap: 32px clamp(32px, 5vw, 80px);
  padding: var(--wing) var(--gutter) 48px; border-top: 1px solid var(--line);
}
.foot .brand { margin: 0 0 12px; color: var(--ink); font: 600 17px/1 var(--display); letter-spacing: .18em; }
.foot .who p:not(.brand) { margin: 0; max-width: 44ch; color: var(--dim); }
.foot .contact { margin: 0; padding: 0; border-top: 1px solid var(--line); }
.foot .contact > div {
  display: grid; grid-template-columns: 72px minmax(0, 1fr); gap: 16px; padding: 12px 0;
  border-bottom: 1px solid var(--line);
}
.foot .contact dt { margin: 0; color: var(--muted); font-size: 14px; }
.foot .contact dd { margin: 0; color: var(--ink); font-size: 15px; overflow-wrap: anywhere; }
.foot .contact a:hover { color: var(--tint); }
.foot .copybtn {
  margin-left: 10px; padding: 4px 10px; cursor: pointer;
  font: 500 12px/1 var(--display); color: var(--dim);
  background: none; border: 1px solid var(--line); border-radius: var(--pill);
  transition: color 160ms ease, border-color 160ms ease;
}
.foot .copybtn:hover { color: var(--ink); border-color: var(--dim); }
.foot .copybtn.done { color: var(--tint); border-color: var(--tint); }
.foot .reg {
  grid-column: 1 / -1; margin: 32px 0 0; padding: 18px 0 0;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px 32px;
  border-top: 1px solid var(--line);
}
.foot .reg > div { display: grid; gap: 3px; }
.foot .reg dt { font: 12px/1.4 var(--mono); color: var(--muted); }
.foot .reg dd { margin: 0; font-size: 13px; line-height: 1.5; color: var(--dim); overflow-wrap: anywhere; }
.foot .fine { grid-column: 1 / -1; margin: 24px 0 0; font: 12px/1.5 var(--mono); color: var(--muted); }

/* narrow screens */
@media (max-width: 900px) {
  .hero { min-height: 92svh; padding-top: 88px; }
  .hero .poster { align-items: flex-start; justify-content: center; padding: 84px 0 0; }
  .hero .poster img { width: min(96vw, 60vh); opacity: .8; }
  .hero .veil {
    background:
      linear-gradient(180deg, rgba(11,13,16,.2) 0%, rgba(11,13,16,0) 20%, rgba(11,13,16,.6) 45%, rgba(11,13,16,.96) 70%);
  }
  .hero .cue { display: none; }
  .cols, .foot { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: 1fr; gap: 0; }
  .timeline li { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 12px; padding: 12px 0 12px 16px; border-top: 0; border-left: 1px solid var(--line); }
  .timeline li::before { top: 18px; left: -4px; }
  .timeline .when { margin: 0; }
  .figs .sheet:nth-child(2) { max-width: none; }
}
@media (max-width: 640px) {
  /* the bar wraps to two lines and stops overlaying the hero */
  .bar { flex-wrap: wrap; height: auto; margin-bottom: 0; padding: 14px var(--gutter) 12px; row-gap: 10px; }
  .bar nav { width: 100%; flex-wrap: wrap; white-space: normal; overflow: visible; gap: 6px 18px; font-size: 12px; }
  .hero { padding-top: 24px; }
  .facts > div { grid-template-columns: 1fr; }
  .facts dd { text-align: left; }
}