:root {
  --bg: #090b0d;
  --bg-elev: #111418;
  --panel: #161a1e;
  --ink: #f2f4f3;
  --muted: #8b949e;
  --line: #242a30;
  --accent: #c8f542;
  --cyan: #7dd3e8;
  --ok: #8fd98a;
  --err: #ef4e3a;
  --warn: #e0a100;
  --radius: 12px;
  --nav-h: 3.5rem;
  --pad: 1.5rem;
  --max: 72rem;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; color-scheme: dark; }
body {
  margin: 0;
  font-family: Inter, "Segoe UI", sans-serif;
  color: var(--ink);
  background-color: var(--bg);
  background-image:
    linear-gradient(rgba(36, 42, 48, 0.35) 1px, transparent 1px),
    linear-gradient(90deg, rgba(36, 42, 48, 0.35) 1px, transparent 1px);
  background-size: 72px 72px;
  background-position: center top;
  min-height: 100vh;
  line-height: 1.5;
}
.skip {
  position: absolute;
  left: 0.75rem;
  top: -3rem;
  z-index: 80;
  padding: 0.4rem 0.7rem;
  background: var(--accent);
  color: #090b0d;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.8125rem;
  border-radius: var(--radius);
}
.skip:focus { top: 0.5rem; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0 var(--pad);
  background: var(--bg-elev);
  background: color-mix(in srgb, var(--bg-elev) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.brand {
  font-weight: 700;
  font-size: 0.84rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.03em;
}
.nav-check { position: absolute; opacity: 0; pointer-events: none; }
.nav-toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  position: relative;
  background: var(--bg);
}
.nav-toggle span:first-child,
.nav-toggle span:first-child::before,
.nav-toggle span:first-child::after {
  content: "";
  position: absolute;
  left: 0.5rem;
  right: 0.5rem;
  height: 1.5px;
  background: var(--ink);
}
.nav-toggle span:first-child { top: 1.3rem; }
.nav-toggle span:first-child::before { top: -6px; }
.nav-toggle span:first-child::after { top: 6px; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem 1.1rem;
}
.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.8125rem;
  font-weight: 500;
}
.nav-links a:hover { color: var(--ink); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.5rem;
  height: auto;
  padding: 0 0.95rem;
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--ink);
  border: 1px solid var(--line);
  background: var(--bg);
  font: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover { background: var(--panel); }
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #090b0d;
}
.btn.primary:hover {
  background: var(--accent);
  filter: brightness(1.06);
}
button.btn {
  font: inherit;
  font-size: 0.8125rem;
  font-weight: 500;
}
.nav-links a.btn {
  color: var(--ink);
  min-height: 2rem;
  height: 2rem;
  padding: 0 0.75rem;
  font-size: 0.8125rem;
}
.nav-links a.btn:hover { color: var(--ink); }
.nav-links a.btn.primary { color: #090b0d; }

.wrap {
  width: min(100%, var(--max));
  margin: 0 auto;
  padding: 0 var(--pad);
}

.hero {
  padding: 4.25rem 0 3.5rem;
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.18fr);
  gap: 2.5rem;
  align-items: center;
}
.eyebrow {
  margin: 0 0 0.85rem;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  line-height: 1.45;
}
.kicker {
  margin: 0 0 0.45rem;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -0.035em; }
h1 { font-size: clamp(2.1rem, 4.2vw, 3.35rem); line-height: 1.05; max-width: 800px; }
h2 { font-size: clamp(1.45rem, 2.4vw, 2.05rem); margin-bottom: 0.5rem; max-width: 800px; line-height: 1.15; }
h3 { font-size: 0.95rem; margin-bottom: 0.3rem; }
.lede {
  margin: 0.7rem 0 0;
  color: var(--muted);
  max-width: 36rem;
  font-size: 0.95rem;
}
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.15rem;
}
.cta-row .btn { min-height: 2.75rem; padding: 0 1.05rem; }
.note {
  margin: 0.85rem 0 0;
  font-size: 0.78rem;
  color: var(--muted);
}

.hero-shot {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: auto;
  background: var(--bg);
  min-width: 0;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.34);
}
.live-pill {
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 99px;
  background: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent);
}
.shot-hint {
  margin: 0;
  padding: 0.55rem 0.75rem 0.7rem;
  border-top: 1px solid var(--line);
  background: var(--bg-elev);
  color: var(--muted);
  font-size: 0.75rem;
}
.shot-bar {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  justify-content: flex-start;
  padding: 0.45rem 0.75rem;
  border-bottom: 1px solid var(--line);
  background: var(--bg-elev);
  font-size: 0.72rem;
  font-style: normal;
  color: var(--muted);
}
.shot-bar [data-shot-focus] { margin-left: auto; }
.hero-shot svg {
  display: block;
  width: 100%;
  height: auto;
}

.live-stage {
  display: grid;
  grid-template-columns: 2.35rem minmax(0, 1fr);
  height: 24.5rem;
  min-width: 36rem;
  background: var(--bg);
}
.live-rail {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.7rem;
  padding: 0.7rem 0;
  border-right: 1px solid var(--line);
  background: var(--bg-elev);
}
.rail-dot {
  width: 0.7rem;
  height: 0.7rem;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: var(--bg);
  cursor: pointer;
}
.rail-dot:hover { border-color: var(--muted); }
.rail-dot.is-on {
  border-color: var(--ink);
  background: var(--panel);
}
.live-main {
  display: grid;
  grid-template-rows: 2rem minmax(0, 1fr);
  min-width: 0;
}
.live-top {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  padding: 0 0.65rem;
  border-bottom: 1px solid var(--line);
  background: var(--bg-elev);
  font-size: 0.72rem;
  color: var(--muted);
}
.live-top strong {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ink);
}
.live-canvas {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(180deg, var(--bg-elev) 0%, var(--bg) 42%),
    var(--bg);
}
.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transform: translateX(0.9rem);
  pointer-events: none;
  background:
    linear-gradient(180deg, var(--bg-elev) 0%, var(--bg) 42%),
    var(--bg);
  overflow: hidden;
  transition: opacity 0.45s ease, transform 0.45s cubic-bezier(0.22, 1, 0.36, 1), visibility 0s 0.45s;
}
.hero-slide.is-on {
  opacity: 1;
  visibility: visible;
  transform: none;
  pointer-events: auto;
  z-index: 1;
  transition-delay: 0s;
}
.hero-world {
  position: relative;
  width: 100%;
  height: 100%;
  transform-origin: 0 0;
  transition: transform 1.35s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: transform;
}
.h-pid,
.h-ts,
.h-alarms {
  position: relative;
  height: 100%;
  padding: 0.55rem 0.65rem 0.6rem;
  box-sizing: border-box;
}
.h-pid-svg,
.h-ts-chart {
  display: block;
  width: 100%;
  height: auto;
}
.h-pid-svg { height: 100%; }
.h-pid-tag {
  position: absolute;
  padding: 0.22rem 0.38rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--muted);
  font-size: 0.58rem;
  line-height: 1.25;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.22);
}
.h-pid-tag b {
  color: var(--ink);
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-weight: 500;
  font-size: 0.68rem;
}
.h-pid-tag.is-flow {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  color: var(--ink);
}
.h-ts {
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 0.35rem;
}
.h-ts-head,
.h-alarms-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
}
.h-ts-kicker {
  margin: 0;
  color: var(--muted);
  font-size: 0.58rem;
  font-weight: 600;
}
.h-ts-title {
  margin: 0;
  font-size: 0.78rem;
  font-weight: 600;
}
.h-ts-meta,
.h-ts-foot {
  color: var(--muted);
  font-size: 0.62rem;
}
.h-ts-chart {
  min-height: 0;
  height: 100%;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 4px;
}
.h-ts-foot {
  display: flex;
  justify-content: space-between;
}
.h-alarms {
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 0.4rem;
}
.h-ack {
  padding: 0.12rem 0.4rem;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--bg);
  color: var(--ink);
  font-size: 0.58rem;
  font-weight: 600;
}
.h-alarm-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.35rem;
  align-content: start;
}
.h-alarm {
  display: grid;
  grid-template-columns: 3.4rem minmax(0, 1fr) auto auto;
  gap: 0.45rem;
  align-items: center;
  padding: 0.38rem 0.5rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left-width: 3px;
  border-radius: 3px;
  font-size: 0.68rem;
}
.h-alarm.is-hi { border-left-color: var(--err); }
.h-alarm.is-warn { border-left-color: var(--warn); }
.h-alarm.is-stale { border-left-color: var(--muted); }
.h-alarm b {
  font-size: 0.58rem;
  letter-spacing: 0.04em;
}
.h-alarm.is-hi b { color: var(--err); }
.h-alarm.is-warn b { color: var(--warn); }
.h-alarm.is-stale b { color: var(--muted); }
.h-alarm span { color: var(--ink); }
.h-alarm em {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-style: normal;
  font-weight: 500;
}
.h-alarm i {
  font-style: normal;
  color: var(--muted);
  font-size: 0.58rem;
}
.h-tile {
  position: absolute;
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  gap: 0.12rem;
  padding: 0.4rem 0.45rem 0.32rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 4px;
  box-sizing: border-box;
  overflow: hidden;
}
.h-tile.is-skid {
  border-color: var(--ink);
  cursor: pointer;
}
.h-name {
  margin: 0;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.h-loc,
.h-foot {
  margin: 0;
  color: var(--muted);
  font-size: 0.62rem;
}
.h-foot { margin-top: 0.15rem; }
.h-metric {
  display: flex;
  justify-content: space-between;
  gap: 0.4rem;
  font-size: 0.72rem;
  color: var(--muted);
}
.h-metric b {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-weight: 500;
  color: var(--ink);
}
.h-hbar {
  height: 0.35rem;
  margin-top: 0.2rem;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 2px;
  overflow: hidden;
}
.h-hbar i {
  display: block;
  height: 100%;
  background: var(--accent);
}
.h-face {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 0.4rem;
  min-height: 0;
  align-items: stretch;
}
.h-gauge {
  position: relative;
  min-width: 0;
}
.h-gauge svg { width: 100%; height: auto; }
.h-gval,
.h-glbl {
  position: absolute;
  left: 0;
  right: 0;
  text-align: center;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
}
.h-gval {
  bottom: 0.15rem;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--ink);
}
.h-glbl {
  top: 0;
  font-size: 0.58rem;
  color: var(--muted);
}
.h-acts {
  display: grid;
  gap: 0.35rem;
  align-content: center;
  min-width: 0;
}
.h-act span {
  display: block;
  margin-bottom: 0.15rem;
  font-size: 0.62rem;
  color: var(--muted);
}
.h-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--line);
  border-radius: 4px;
  overflow: hidden;
}
.h-toggle b {
  margin: 0;
  padding: 0.22rem 0;
  text-align: center;
  font-size: 0.62rem;
  font-weight: 600;
  color: var(--muted);
  background: var(--bg);
}
.h-toggle b.is-on {
  color: #090b0d;
  background: var(--accent);
}
.h-slider {
  height: 0.45rem;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 99px;
  overflow: hidden;
}
.h-slider i {
  display: block;
  height: 100%;
  background: var(--accent);
}

.facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 1.5rem;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.facts div {
  background: var(--panel);
  padding: 0.8rem 0.9rem;
}
.facts strong {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
}
.facts span {
  display: block;
  margin-top: 0.2rem;
  color: var(--muted);
  font-size: 0.78rem;
}

.band {
  padding: 4.25rem 0 4.5rem;
  border-top: 1px solid var(--line);
}
.band.alt { background: color-mix(in srgb, var(--bg-elev) 72%, transparent); }
.band.tech { background: #0c0e10; }
.band .lede { margin-bottom: 1.35rem; }

.exp-zones {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}
.exp-zone {
  text-align: left;
  padding: 1.15rem 1.2rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: inherit;
  font: inherit;
  cursor: pointer;
}
.exp-zone strong { display: block; font-size: 0.95rem; }
.exp-zone span {
  display: block;
  margin-top: 0.4rem;
  color: var(--muted);
  font-size: 0.84rem;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.28s ease, opacity 0.28s ease, margin 0.28s ease;
}
.exp-zone:hover span,
.exp-zone:focus-visible span,
.exp-zone.is-on span {
  max-height: 6rem;
  opacity: 1;
  margin-top: 0.45rem;
}
.exp-zone.is-on {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--line));
}

.flow-track {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 0.55rem;
}
.flow-node {
  flex: 1 1 8.5rem;
  padding: 0.9rem 0.95rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  min-width: 8rem;
}
.flow-kind {
  display: block;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.flow-node strong { display: block; margin: 0.2rem 0 0.15rem; }
.flow-val {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.92rem;
  color: var(--cyan);
}
.flow-node.is-live { border-color: color-mix(in srgb, var(--accent) 50%, var(--line)); }
.flow-node:has(.flow-arrow) {
  flex: 0 0 1.6rem;
  padding: 0;
  border: 0;
  background: none;
  min-width: 0;
  display: grid;
  place-items: center;
}
.flow-arrow {
  display: block;
  width: 1.6rem;
  height: 2px;
  margin: 1.6rem auto 0;
  background: var(--line);
  position: relative;
  overflow: hidden;
}
.flow-arrow::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 0.45rem;
  background: var(--cyan);
  animation: flow-dot 1.8s ease-in-out infinite;
}
@keyframes flow-dot {
  from { transform: translateX(-8px); opacity: 0; }
  20% { opacity: 1; }
  to { transform: translateX(28px); opacity: 0; }
}

.use-grid.editorial { gap: 1rem; }
.use-label {
  margin: 0.85rem 0 0.2rem;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.use-card h3 { font-size: 1.15rem; letter-spacing: -0.03em; }
.mini-hmi {
  height: 6.5rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 0.7rem;
  padding: 0.7rem;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.68rem;
  color: var(--muted);
}
.mini-hmi.tank .mini-cell {
  width: 2.1rem;
  height: 4.4rem;
  border: 1px solid var(--line);
  border-radius: 3px;
  position: relative;
  overflow: hidden;
}
.mini-hmi.tank i {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  background: color-mix(in srgb, var(--accent) 55%, transparent);
}
.mini-hmi.tank b {
  position: absolute;
  left: -0.2rem;
  bottom: -1.35rem;
  font-weight: 500;
  white-space: nowrap;
}
.mini-hmi.skid { align-items: center; flex-direction: column; }
.mini-gauge {
  border: 2px solid var(--accent);
  border-bottom: 0;
  border-radius: 3rem 3rem 0 0;
  padding: 0.65rem 0.9rem 0.2rem;
  color: var(--ink);
}
.mini-toggle {
  padding: 0.15rem 0.45rem;
  background: var(--accent);
  color: #090b0d;
  font-weight: 600;
  border-radius: 4px;
}
.mini-hmi.util { flex-direction: column; align-items: stretch; justify-content: center; }
.mini-hmi.util .dim { color: #5d6770; }

.pid-board {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  overflow: auto;
  min-height: 18rem;
}
.pid-large {
  display: block;
  width: 100%;
  min-width: 44rem;
  height: auto;
}
.pid-hot { cursor: pointer; }
.pid-hot:focus { outline: none; }
.pid-hot:hover circle,
.pid-hot:focus-visible circle {
  stroke: var(--ink);
}
.pid-tip {
  position: absolute;
  right: 1rem;
  top: 1rem;
  min-width: 9.5rem;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg);
}
.pid-tip-tag {
  margin: 0;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.78rem;
  font-weight: 600;
}
.pid-tip-val {
  margin: 0.15rem 0 0;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  color: var(--cyan);
  font-size: 1.05rem;
}
.pid-tip-meta {
  margin: 0.35rem 0 0;
  display: flex;
  justify-content: space-between;
  gap: 0.6rem;
  color: var(--muted);
  font-size: 0.7rem;
}

.iso-tree { margin-top: 1.5rem; }
.iso-root {
  display: inline-block;
  padding: 0.45rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.iso-branches {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 1.1rem;
  padding-top: 1.1rem;
  border-top: 1px dashed var(--line);
}
.iso-co {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.05rem 1.1rem;
  background: var(--panel);
  box-shadow: inset 0 0 0 1px transparent;
  animation: iso-in 0.8s ease both;
}
.iso-co[data-iso="nova"] { animation-delay: 0.12s; }
.iso-co[data-iso="alpha"] { animation-delay: 0.24s; }
.iso-co h3 { font-family: "IBM Plex Mono", ui-monospace, monospace; font-size: 0.82rem; letter-spacing: 0.04em; }
.iso-co ul { margin: 0.55rem 0 0; padding: 0; list-style: none; color: var(--muted); font-size: 0.88rem; }
.iso-co li + li { margin-top: 0.28rem; }
.iso-note { margin: 1rem 0 0; color: var(--muted); font-size: 0.88rem; max-width: 40rem; }
@keyframes iso-in {
  from { transform: translateY(8px); opacity: 0.4; }
  to { transform: none; opacity: 1; }
}

.steps {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.1rem;
}
.step-n {
  display: block;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 1.65rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: -0.04em;
}
.steps h3 { margin: 0.45rem 0 0.3rem; font-size: 1.05rem; }
.steps p { margin: 0; color: var(--muted); font-size: 0.88rem; }
.steps code { font-family: "IBM Plex Mono", ui-monospace, monospace; font-size: 0.84em; color: var(--ink); }

.arch-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.arch-grid li {
  background: var(--panel);
  padding: 1.05rem 1.05rem 1.2rem;
}
.arch-grid strong { display: block; font-size: 0.9rem; }
.arch-grid span { display: block; margin-top: 0.35rem; color: var(--muted); font-size: 0.82rem; }
.safety-line {
  margin: 1.35rem 0 0;
  max-width: 40rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.close { padding: 5.5rem 0; }
.close-inner { max-width: 40rem; }
.close h2 { font-size: clamp(2rem, 4vw, 3.1rem); }

.reveal { animation: rise 0.8s cubic-bezier(0.22, 1, 0.36, 1) both; }
@keyframes rise {
  from { transform: translateY(14px); opacity: 0.01; }
  to { transform: none; opacity: 1; }
}

.story-grid,
.use-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}
.story-card,
.use-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.05rem 1.1rem 1.2rem;
}
.story-step {
  margin: 0 0 0.45rem;
  width: 1.6rem;
  height: 1.6rem;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: var(--bg);
  border: 1px solid var(--line);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
}
.story-card p,
.use-card p {
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}
.story-card code {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.82em;
  color: var(--ink);
}
.use-art {
  height: 4.25rem;
  margin-bottom: 0.7rem;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: var(--bg);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.55rem;
}
.use-tank {
  width: 1.6rem;
  height: 2.4rem;
  border: 1px solid var(--line);
  border-radius: 3px 3px 2px 2px;
  background: linear-gradient(180deg, var(--bg-elev) 35%, var(--accent) 35%);
}
.use-art i {
  width: 2.4rem;
  height: 0.35rem;
  background: var(--line);
  align-self: center;
}
.use-art.skid { align-items: center; }
.use-gauge {
  width: 2.4rem;
  height: 1.35rem;
  border: 2px solid var(--accent);
  border-bottom: 0;
  border-radius: 2.4rem 2.4rem 0 0;
}
.use-pump {
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--panel);
}
.use-art.util { flex-direction: column; align-items: stretch; justify-content: center; gap: 0.35rem; }
.use-line {
  height: 0.45rem;
  background: var(--accent);
  border-radius: 99px;
  width: 78%;
}
.use-line.dim { width: 52%; background: var(--line); }
.how {
  margin: 1.4rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.65rem;
}
.how li {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.8rem 1rem;
  color: var(--muted);
  font-size: 0.9rem;
}
.how strong { color: var(--ink); }

.spec {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.spec th,
.spec td {
  text-align: left;
  vertical-align: top;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--line);
}
.spec th {
  width: 12rem;
  color: var(--muted);
  font-weight: 600;
  background: var(--bg-elev);
}
.spec td { background: var(--panel); }

.plans {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
  margin-top: 0.35rem;
}
.plans th,
.plans td {
  border: 1px solid var(--line);
  padding: 0.65rem 0.7rem;
  text-align: left;
}
.plans thead th {
  background: var(--bg-elev);
  font-weight: 600;
}
.plans td { background: var(--panel); }
.plans .num { font-variant-numeric: tabular-nums; }
.plans thead th.popular { border-top: 2px solid var(--accent); }
.plans tbody th {
  background: var(--bg-elev);
  color: var(--muted);
  font-weight: 600;
  width: 9.5rem;
}
.plans .btn { min-height: 2rem; white-space: nowrap; }
.table-scroll { overflow-x: auto; margin-top: 1.25rem; }
.plans { min-width: 44rem; }
.price-usd { color: var(--ink); font-weight: 600; }
.price-rial { color: var(--muted); font-size: 0.78rem; }
.plan-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(11.5rem, 1fr));
  gap: 0.75rem;
}
.plan-card {
  display: grid;
  align-content: start;
  gap: 0.25rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 0.95rem 1.05rem;
}
.plan-card.is-featured {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}
.plan-badge {
  margin: 0 0 0.35rem;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: #090b0d;
  background: var(--accent);
  display: inline-block;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
}
.plan-price { margin: 0.15rem 0 0; font-size: 1.35rem; }
.plan-price .per { font-size: 0.8rem; color: var(--muted); font-weight: 500; }
.plan-card .plan-rial { margin: 0; }
.plan-fit { margin: 0.15rem 0 0.45rem; font-size: 0.82rem; color: var(--muted); }
.plan-limits { margin: 0 0 0.85rem; padding: 0; list-style: none; color: var(--muted); font-size: 0.8rem; }
.plan-limits li + li { margin-top: 0.28rem; }
.plan-card .btn { width: 100%; margin-top: auto; }

.start-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}
.form-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 1.25rem 1.25rem 1.4rem;
}
.order {
  margin: 0 0 1rem;
  padding: 0.85rem 0.95rem;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: var(--bg);
}
.order-kicker {
  margin: 0;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}
.order-line { margin: 0.3rem 0 0; font-size: 0.95rem; }
.order-price { margin: 0.2rem 0 0; font-weight: 600; }
.order-note { margin: 0.4rem 0 0; color: var(--muted); font-size: 0.78rem; }
.form-card > p:not(.kicker) { margin: 0.35rem 0 0.7rem; color: var(--muted); font-size: 0.875rem; }
label {
  display: block;
  margin: 0.7rem 0 0.25rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
}
input, select {
  width: 100%;
  min-height: 2.75rem;
  height: 2.75rem;
  padding: 0 0.75rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink);
  font: inherit;
  font-size: 0.9rem;
}
input:focus, select:focus {
  outline: none;
  border-color: var(--accent);
}
.form-status { min-height: 1.3rem; margin: 0.7rem 0 0; font-size: 0.8125rem; }
.form-status.ok { color: var(--ok); }
.form-status.err { color: var(--err); }
.form-status a { color: var(--accent); }
.form-status code {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.85em;
}
.form-card .cta-row { margin-top: 0.95rem; }
.form-rule { margin: 1.2rem 0; border: 0; border-top: 1px solid var(--line); }
.hint { color: var(--muted); font-size: 0.8125rem; }

.foot {
  display: flex;
  justify-content: space-between;
  gap: 1.25rem;
  flex-wrap: wrap;
  align-items: flex-end;
  padding: 1.6rem var(--pad) 2.2rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.78rem;
}
.foot strong {
  display: block;
  color: var(--ink);
  font-size: 0.88rem;
  letter-spacing: -0.02em;
}
.foot nav { display: flex; flex-wrap: wrap; gap: 0.85rem 1.1rem; }
.foot a { color: var(--ink); text-decoration: none; }
.foot a:hover { color: var(--accent); }

.faq details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 0.2rem 1rem 0.85rem;
  margin-top: 0.65rem;
}
.faq summary {
  cursor: pointer;
  font-weight: 600;
  padding: 0.75rem 0;
}
.faq details p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-world,
  .hero-slide,
  .reveal,
  .iso-co { animation: none; transition: none; }
  .flow-arrow::after { animation: none; }
}
@media (max-width: 980px) {
  .hero-grid,
  .start-grid,
  .story-grid,
  .use-grid,
  .exp-zones,
  .iso-branches,
  .steps,
  .arch-grid { grid-template-columns: 1fr; }
  .arch-grid { grid-template-columns: 1fr 1fr; }
  .live-stage { height: 22rem; }
  .h-alarm {
    grid-template-columns: 3.2rem minmax(0, 1fr) auto;
  }
  .h-alarm i { display: none; }
}
@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    padding: 0.65rem var(--pad) 0.85rem;
    background: var(--bg-elev);
    border-bottom: 1px solid var(--line);
  }
  .nav-links a {
    min-height: 2.75rem;
    display: flex;
    align-items: center;
  }
  .nav-check:checked ~ .nav-links { display: flex; }
  .plan-grid { grid-template-columns: 1fr; }
}