/* ─────────────────────────────────────────────────────────
   SWITCH FIVE — heavy industrial design tokens
   Dark, rugged, monospace, hi-vis accents.
   ───────────────────────────────────────────────────────── */

:root {
  /* Surfaces */
  --bg:        #0d0f10;
  --bg-2:      #14171a;
  --surface:   #181b1e;
  --surface-2: #1f2326;
  --line:      #262a2e;
  --line-2:    #33383d;

  /* Ink */
  --ink:       #f4f5f5;
  --ink-2:     #c7cbcd;
  --muted:     #7c8388;
  --dim:       #4a5054;

  /* Hi-vis accents (the lime is the signature) */
  --hv:        #d4ff00;     /* primary hi-vis */
  --hv-dim:    #a8cc00;
  --hv-glow:   rgba(212,255,0,.18);

  --warn:      #ff7a1a;
  --ok:        #5fd07a;
  --err:       #ff4d4d;
  --info:      #6db3ff;

  /* Type */
  --f-sans:    "Space Grotesk", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --f-mono:    "JetBrains Mono", ui-monospace, "SF Mono", Consolas, "Liberation Mono", monospace;
  --f-display: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;

  /* Geometry */
  --r-0: 0px;
  --r-1: 2px;
  --r-2: 4px;
  --pad: 24px;
  --wrap: 1280px;

  /* Motion */
  --ease: cubic-bezier(.2,.7,.2,1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--f-sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  background-image:
    radial-gradient(1200px 600px at 80% -10%, rgba(212,255,0,.05), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, rgba(109,179,255,.04), transparent 60%);
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; }
img { max-width: 100%; display: block; }

/* ─────────────── Mono / display helpers ─────────────── */

.mono { font-family: var(--f-mono); }
.mono-sm { font-family: var(--f-mono); font-size: 11px; letter-spacing: .04em; text-transform: uppercase; }
.mono-xs { font-family: var(--f-mono); font-size: 10px; letter-spacing: .06em; text-transform: uppercase; }

.eyebrow {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--hv);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--hv);
}

.section-tag {
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
}

h1, h2, h3, h4 {
  font-family: var(--f-display);
  font-weight: 600;
  letter-spacing: -.02em;
  margin: 0;
  text-wrap: balance;
}

h1 { font-size: clamp(40px, 6vw, 88px); line-height: 1; letter-spacing: -.035em; font-weight: 600; }
h2 { font-size: clamp(28px, 3.6vw, 52px); line-height: 1.05; letter-spacing: -.025em; }
h3 { font-size: clamp(20px, 1.8vw, 26px); line-height: 1.15; }
h4 { font-size: 16px; line-height: 1.3; }

p { margin: 0; text-wrap: pretty; }

/* ─────────────── Layout ─────────────── */

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

.page {
  padding-top: 80px; /* under fixed nav */
}

.section {
  padding: 96px 0;
  position: relative;
}
.section--tight { padding: 64px 0; }
.section--xl { padding: 128px 0; }

.divider {
  height: 1px;
  background: var(--line);
}
.divider-tick {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--muted);
}
.divider-tick::before, .divider-tick::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

/* ─────────────── Navigation ─────────────── */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 64px;
  z-index: 100;
  background: rgba(13,15,16,.78);
  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--pad);
  height: 100%;
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--f-mono);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: .12em;
  text-transform: uppercase;
  cursor: pointer;
}
.nav-logo-mark {
  width: 22px; height: 22px;
  display: grid; place-items: center;
  background: var(--hv);
  color: var(--bg);
  font-weight: 700;
  font-size: 11px;
  letter-spacing: 0;
}
.nav-links {
  display: flex;
  gap: 4px;
  margin-left: auto;
  align-items: center;
}
.nav-link {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--ink-2);
  padding: 8px 12px;
  cursor: pointer;
  position: relative;
  border: 1px solid transparent;
  transition: color .15s var(--ease), border-color .15s var(--ease);
}
.nav-link:hover { color: var(--ink); }
.nav-link.is-active {
  color: var(--hv);
  border-color: var(--line);
}
.nav-link.is-active::before {
  content: "›";
  margin-right: 6px;
  color: var(--hv);
}

/* ─────────────── Buttons ─────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  font-weight: 500;
  padding: 14px 20px;
  cursor: pointer;
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line-2);
  transition: background .15s var(--ease), border-color .15s var(--ease), color .15s var(--ease), transform .15s var(--ease);
  white-space: nowrap;
}
.btn:hover { border-color: var(--ink-2); }
.btn:active { transform: translateY(1px); }

.btn--primary {
  background: var(--hv);
  color: var(--bg);
  border-color: var(--hv);
  font-weight: 600;
}
.btn--primary:hover {
  background: var(--ink);
  border-color: var(--ink);
}

.btn--ghost {
  border-color: var(--line);
  color: var(--ink-2);
}
.btn--ghost:hover { color: var(--ink); border-color: var(--line-2); }

.btn .btn-arrow {
  transition: transform .2s var(--ease);
}
.btn:hover .btn-arrow { transform: translateX(3px); }

/* ─────────────── Cards & blocks ─────────────── */

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 28px;
  position: relative;
}
.card--bare {
  background: transparent;
  border-color: var(--line);
}
.card-corners::before,
.card-corners::after {
  content: "";
  position: absolute;
  width: 10px; height: 10px;
  border: 1px solid var(--hv);
}
.card-corners::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.card-corners::after  { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }

/* Status chip */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: 4px 8px;
  border: 1px solid var(--line-2);
  color: var(--ink-2);
  background: var(--bg-2);
}
.chip-dot {
  width: 6px; height: 6px;
  background: var(--ok);
  display: inline-block;
}
.chip--live .chip-dot { background: var(--ok); animation: pulse 1.6s infinite; }
.chip--warn .chip-dot { background: var(--warn); }
.chip--alert .chip-dot { background: var(--err); animation: pulse 1s infinite; }
.chip--hv { color: var(--hv); border-color: var(--hv); }
.chip--hv .chip-dot { background: var(--hv); }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .35; }
}

/* Stats */
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.stat {
  padding: 24px;
  border-right: 1px solid var(--line);
}
.stat:last-child { border-right: 0; }
.stat-num {
  font-family: var(--f-display);
  font-size: 40px;
  font-weight: 600;
  letter-spacing: -.03em;
  line-height: 1;
  color: var(--ink);
}
.stat-num .unit { font-size: 18px; color: var(--muted); margin-left: 4px; }
.stat-lbl {
  margin-top: 8px;
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
}

/* Grid overlay (subtle blueprint feel) */
.grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: .25;
  pointer-events: none;
  mask-image: radial-gradient(800px 400px at 50% 30%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(800px 400px at 50% 30%, #000 30%, transparent 80%);
}

/* Reticle / coordinates ornament */
.reticle {
  position: absolute;
  font-family: var(--f-mono);
  font-size: 10px;
  color: var(--muted);
  letter-spacing: .04em;
  pointer-events: none;
}

/* ─────────────── Hero ─────────────── */

.hero {
  position: relative;
  padding: 120px 0 96px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.hero-meta {
  display: flex;
  gap: 24px;
  margin-bottom: 32px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--muted);
  align-items: center;
  flex-wrap: wrap;
}

/* ─────────────── Pillars / feature cards ─────────────── */

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.pillar {
  padding: 40px 32px;
  border-right: 1px solid var(--line);
  position: relative;
  cursor: pointer;
  transition: background .2s var(--ease);
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 380px;
}
.pillar:last-child { border-right: 0; }
.pillar:hover { background: var(--surface); }
.pillar-num {
  font-family: var(--f-mono);
  font-size: 11px;
  color: var(--muted);
}
.pillar-title {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -.02em;
  line-height: 1;
}
.pillar-desc {
  color: var(--ink-2);
  font-size: 14px;
}
.pillar-foot {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.pillar-foot .arrow { color: var(--hv); transition: transform .2s var(--ease); }
.pillar:hover .pillar-foot .arrow { transform: translateX(4px); }

@media (max-width: 900px) {
  .pillars { grid-template-columns: 1fr; }
  .pillar { border-right: 0; border-bottom: 1px solid var(--line); }
  .pillar:last-child { border-bottom: 0; }
}

/* ─────────────── Feature lists ─────────────── */

.spec-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}
.spec-list li {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 24px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}
.spec-list li:last-child { border-bottom: 0; }
.spec-key {
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
}
.spec-val { color: var(--ink); font-size: 15px; }

/* ─────────────── Form controls ─────────────── */

.field { display: flex; flex-direction: column; gap: 8px; }
.field-lbl {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
}
.field-lbl .req { color: var(--hv); margin-left: 4px; }

.input, .textarea, .select {
  background: var(--bg-2);
  border: 1px solid var(--line);
  color: var(--ink);
  padding: 12px 14px;
  font-family: var(--f-sans);
  font-size: 14px;
  width: 100%;
  border-radius: 0;
  transition: border-color .15s var(--ease);
}
.input:focus, .textarea:focus, .select:focus {
  outline: 0;
  border-color: var(--hv);
  box-shadow: 0 0 0 3px var(--hv-glow);
}
.textarea { resize: vertical; min-height: 100px; font-family: var(--f-sans); }
.field-err { color: var(--err); font-family: var(--f-mono); font-size: 11px; }

.checkbox-group {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}
.checkbox-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  cursor: pointer;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--ink-2);
  transition: all .15s var(--ease);
  user-select: none;
}
.checkbox-card:hover { border-color: var(--line-2); }
.checkbox-card.is-on {
  border-color: var(--hv);
  color: var(--hv);
  background: var(--hv-glow);
}
.checkbox-box {
  width: 14px; height: 14px;
  border: 1px solid var(--line-2);
  display: grid; place-items: center;
}
.checkbox-card.is-on .checkbox-box {
  background: var(--hv);
  border-color: var(--hv);
}
.checkbox-card.is-on .checkbox-box::after {
  content: "";
  width: 6px; height: 6px; background: var(--bg);
}

/* ─────────────── Footer ─────────────── */

.footer {
  border-top: 1px solid var(--line);
  padding: 64px 0 32px;
  margin-top: 0;
  background: var(--bg-2);
  position: relative;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--line);
}
.footer-col h5 {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 16px;
  font-weight: 500;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.footer-col a { color: var(--ink-2); font-size: 13px; }
.footer-col a:hover { color: var(--hv); }
.footer-bar {
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
}
.footer-bar > div { display: flex; gap: 24px; }

@media (max-width: 800px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

/* ─────────────── 2-col content layouts ─────────────── */

.two-col {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 64px;
  align-items: start;
}
.two-col--reverse { grid-template-columns: 1fr 1.1fr; }
@media (max-width: 900px) {
  .two-col, .two-col--reverse { grid-template-columns: 1fr; gap: 40px; }
}

/* Solution intro */
.solution-head {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 48px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 56px 0;
}
.solution-head .lead {
  font-size: clamp(22px, 2.4vw, 32px);
  line-height: 1.25;
  color: var(--ink);
  font-weight: 400;
  letter-spacing: -.015em;
}
@media (max-width: 800px) {
  .solution-head { grid-template-columns: 1fr; gap: 24px; padding: 40px 0; }
}

/* Problem / solution split */
.ps-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--line);
}
.ps-cell { padding: 32px; border-right: 1px solid var(--line); }
.ps-cell:last-child { border-right: 0; }
.ps-tag {
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.ps-cell--problem .ps-tag { color: var(--warn); }
.ps-cell--solution .ps-tag { color: var(--hv); }
.ps-cell h3 { margin-bottom: 12px; }
@media (max-width: 800px) {
  .ps-grid { grid-template-columns: 1fr; }
  .ps-cell { border-right: 0; border-bottom: 1px solid var(--line); }
  .ps-cell:last-child { border-bottom: 0; }
}

/* Industry use cases grid */
.uc-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--line);
}
.uc-cell {
  padding: 24px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  min-height: 160px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.uc-cell:nth-child(4n) { border-right: 0; }
.uc-cell:nth-last-child(-n+4) { border-bottom: 0; }
@media (max-width: 800px) {
  .uc-grid { grid-template-columns: repeat(2, 1fr); }
  .uc-cell { border-right: 1px solid var(--line) !important; border-bottom: 1px solid var(--line) !important; }
  .uc-cell:nth-child(2n) { border-right: 0 !important; }
}

/* CTA strip */
.cta-strip {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 64px 0;
  background:
    linear-gradient(180deg, transparent, rgba(212,255,0,.02));
  position: relative;
}
.cta-strip-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-strip h2 { max-width: 600px; }

/* Diagrams container */
.diagram-frame {
  background: var(--bg-2);
  border: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.diagram-frame .corner {
  position: absolute;
  font-family: var(--f-mono);
  font-size: 9px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 8px 12px;
}
.diagram-frame .corner--tl { top: 0; left: 0; }
.diagram-frame .corner--tr { top: 0; right: 0; }
.diagram-frame .corner--bl { bottom: 0; left: 0; }
.diagram-frame .corner--br { bottom: 0; right: 0; }

/* SVG dashes drawing animation */
@keyframes flow-dash {
  to { stroke-dashoffset: -20; }
}
.flow-line {
  stroke-dasharray: 4 6;
  animation: flow-dash 1s linear infinite;
}

/* Generic fade-in */
@keyframes fade-up {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Scrollbar (subtle) */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--line-2); }
::-webkit-scrollbar-thumb:hover { background: var(--muted); }

/* Responsive nav */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-links.is-open {
    display: flex;
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: var(--bg-2);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    padding: 16px;
    gap: 0;
  }
  .nav-links.is-open .nav-link { padding: 14px; border-bottom: 1px solid var(--line); }
  .nav-burger { display: inline-flex !important; margin-left: auto; }
}
.nav-burger {
  display: none;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink);
  padding: 8px 10px;
  font-family: var(--f-mono);
  font-size: 11px;
  cursor: pointer;
}

/* utility */
.row { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.stack { display: flex; flex-direction: column; gap: 16px; }
.muted { color: var(--muted); }
.ink-2 { color: var(--ink-2); }
.hv { color: var(--hv); }
.lead { font-size: 18px; color: var(--ink-2); line-height: 1.55; max-width: 60ch; }
.kicker { color: var(--muted); font-size: 14px; }