/* Kohlvex commercial website. Editorial precision + industrial intelligence. */
:root,
html[data-theme="dark"] {
  color-scheme: dark;
  --ink: #140F18;
  --ink-2: #201925;
  --ink-3: #30263A;
  --line: #4A3A56;
  --line-soft: rgba(247, 242, 238, 0.10);
  --off: #F7F2EE;
  --white: #FFFDFC;
  --muted: #C0B7AE;
  --muted-2: #92859A;
  --text-secondary: #D6CDD9;
  --accent: #A06BFF;
  --accent-rgb: 160, 107, 255;
  --copper: #D69A58;
  --copper-rgb: 214, 154, 88;
  --data: #95AFFF;
  --data-rgb: 149, 175, 255;
  --success: #22C55E;
  --success-rgb: 34, 197, 94;
  --warning: #F59E0B;
  --warning-rgb: 245, 158, 11;
  --red: #DF6161;
  --red-rgb: 223, 97, 97;
  --on-accent: #170D20;
  --header-bg: rgba(20, 15, 24, 0.78);
  --shadow: 0 30px 60px -30px rgba(8, 4, 10, 0.68);
  --shadow-soft: 0 18px 40px -24px rgba(8, 4, 10, 0.52);

  --maxw: 1200px;
  --pad: clamp(20px, 5vw, 64px);
  --r-lg: 20px;
  --r-md: 14px;
  --r-sm: 10px;

  --sans: "Space Grotesk", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --body: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", "JetBrains Mono", Menlo, Consolas, monospace;
}

html[data-theme="light"] {
  color-scheme: light;
  --ink: #FBF8FC;
  --ink-2: #F3EDF6;
  --ink-3: #E9E0ED;
  --line: #D6C7DC;
  --line-soft: rgba(48, 38, 58, 0.12);
  --off: #281D2D;
  --white: #1C1221;
  --muted: #6E6471;
  --muted-2: #887A8C;
  --text-secondary: #514758;
  --accent: #7C4BD1;
  --accent-rgb: 124, 75, 209;
  --copper: #B86F32;
  --copper-rgb: 184, 111, 50;
  --data: #536FD1;
  --data-rgb: 83, 111, 209;
  --success: #168D43;
  --success-rgb: 22, 141, 67;
  --warning: #A86600;
  --warning-rgb: 168, 102, 0;
  --red: #B6414B;
  --red-rgb: 182, 65, 75;
  --on-accent: #FFFFFF;
  --header-bg: rgba(251, 248, 252, 0.86);
  --shadow: 0 30px 60px -34px rgba(62, 40, 73, 0.26);
  --shadow-soft: 0 18px 40px -26px rgba(62, 40, 73, 0.20);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: var(--body);
  background: var(--ink);
  color: var(--off);
  transition: background-color .25s ease, color .25s ease;
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4, .display { font-family: var(--sans); font-weight: 600; line-height: 1.08; letter-spacing: -0.02em; color: var(--white); }
h1 { font-size: clamp(2.3rem, 5.4vw, 4rem); margin: 0 0 .6em; }
h2 { font-size: clamp(1.8rem, 3.6vw, 2.9rem); margin: 0 0 .5em; }
h3 { font-size: clamp(1.15rem, 1.8vw, 1.4rem); margin: 0 0 .5em; letter-spacing: -0.01em; }
p { margin: 0 0 1rem; color: var(--text-secondary); }
a { color: var(--off); text-decoration: none; }
strong { color: var(--white); font-weight: 600; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding-left: var(--pad); padding-right: var(--pad); }
section { padding: clamp(64px, 9vw, 128px) 0; position: relative; }
.eyebrow {
  font-family: var(--mono); font-size: .74rem; letter-spacing: .18em; text-transform: uppercase;
  color: var(--accent); margin: 0 0 18px; display: inline-flex; align-items: center; gap: 10px;
}
.eyebrow::before { content: ""; width: 22px; height: 1px; background: var(--accent); display: inline-block; }
.lead { font-size: clamp(1.05rem, 1.6vw, 1.22rem); color: var(--text-secondary); max-width: 62ch; }
.muted { color: var(--muted); }
.mono { font-family: var(--mono); }
.center { text-align: center; }

/* Skip link */
.skip { position: absolute; left: -999px; top: 0; z-index: 200; background: var(--white); color: var(--ink); padding: 12px 18px; border-radius: 0 0 8px 0; font-weight: 600; }
.skip:focus { left: 0; }

:focus-visible { outline: 2px solid var(--data); outline-offset: 3px; border-radius: 6px; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 10px; font-family: var(--sans); font-weight: 600; font-size: .98rem;
  padding: 13px 22px; border-radius: 999px; border: 1px solid transparent; cursor: pointer; transition: transform .18s ease, background-color .2s ease, border-color .2s ease, color .2s ease; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: var(--on-accent); box-shadow: 0 10px 28px -16px rgba(var(--accent-rgb), .9); }
.btn-primary:hover { background: color-mix(in srgb, var(--accent) 88%, white 12%); transform: translateY(-2px); }
.btn-ghost { background: transparent; color: var(--white); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.btn-lg { padding: 16px 28px; font-size: 1.05rem; }
.arrow { transition: transform .2s ease; }
.btn:hover .arrow { transform: translateX(3px); }

/* Brand mark */
.mark { width: 34px; height: 34px; flex: none; }
.mark circle { fill: var(--accent); }
.mark .mark-accent { fill: var(--data); }
.mark .mark-copper { fill: var(--copper); }
.mark path { fill: none; stroke: var(--off); stroke-width: 4; stroke-linecap: round; stroke-linejoin: round; }
.mark .mark-link { stroke: var(--muted-2); stroke-width: 3; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-family: var(--sans); font-weight: 600; font-size: 1.28rem; color: var(--white); letter-spacing: -0.01em; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 100; background: var(--header-bg); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid var(--line-soft); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { color: var(--text-secondary); font-size: .95rem; font-weight: 500; transition: color .18s ease; }
.nav-links a:hover { color: var(--white); }
.nav-cta { display: flex; align-items: center; gap: 14px; }
.nav-toggle { display: none; background: transparent; border: 1px solid var(--line); border-radius: 10px; width: 44px; height: 44px; cursor: pointer; color: var(--white); align-items: center; justify-content: center; }
.nav-toggle svg { width: 22px; height: 22px; }

/* Layout helpers */
.grid { display: grid; gap: 24px; }
.g-2 { grid-template-columns: repeat(2, 1fr); }
.g-3 { grid-template-columns: repeat(3, 1fr); }
.g-4 { grid-template-columns: repeat(4, 1fr); }
.split { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(32px, 5vw, 72px); align-items: center; }
.section-head { max-width: 760px; margin-bottom: 52px; }

/* Cards */
.card { background: linear-gradient(180deg, var(--ink-2), var(--ink)); border: 1px solid var(--line-soft); border-radius: var(--r-lg); padding: 28px; transition: transform .22s ease, border-color .22s ease; }
.card:hover { transform: translateY(-4px); border-color: rgba(21, 183, 126, 0.4); }
.card h3 { color: var(--white); }
.card .ic { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 18px; background: rgba(var(--accent-rgb),.12); color: var(--accent); }
.card .ic svg { width: 22px; height: 22px; }
.tag { font-family: var(--mono); font-size: .7rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }

/* Hero */
.hero { padding-top: clamp(56px, 8vw, 96px); background:
  radial-gradient(1100px 520px at 78% -8%, rgba(var(--data-rgb),.14), transparent 60%),
  radial-gradient(900px 500px at 8% 6%, rgba(var(--copper-rgb),.10), transparent 55%); }
.hero .split { align-items: center; }
.hero h1 { max-width: 15ch; }
.hero .lead { margin-bottom: 30px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.hero-micro { margin-top: 22px; font-size: .92rem; color: var(--muted); display: flex; align-items: center; gap: 9px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px rgba(var(--accent-rgb),.18); flex: none; }

/* Provenance visual (hero + trust) */
.evfx { background: linear-gradient(180deg, var(--ink-2), var(--ink)); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 22px; box-shadow: var(--shadow); position: relative; }
.evfx .synthetic { position: absolute; top: 14px; right: 16px; font-family: var(--mono); font-size: .62rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted-2); }
.panel { background: var(--ink-3); border: 1px solid var(--line); border-radius: var(--r-md); padding: 16px 18px; }
.panel + .panel { margin-top: 12px; }
.panel .p-label { font-family: var(--mono); font-size: .68rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted-2); margin-bottom: 6px; }
.doc-line { display: flex; align-items: center; gap: 12px; color: var(--text-secondary); font-size: .92rem; }
.doc-ic { width: 34px; height: 42px; border-radius: 6px; border: 1px solid var(--line); background: repeating-linear-gradient(180deg, rgba(var(--accent-rgb),.14) 0 2px, transparent 2px 7px); flex: none; position: relative; }
.hl { background: rgba(var(--copper-rgb),.20); color: var(--copper); padding: 1px 6px; border-radius: 5px; font-family: var(--mono); font-size: .82rem; }
.val { font-family: var(--mono); font-size: 1.5rem; color: var(--white); font-weight: 500; letter-spacing: -0.01em; }
.val small { font-size: .95rem; color: var(--muted); }
.kvs { display: grid; grid-template-columns: auto 1fr; gap: 5px 16px; font-size: .86rem; }
.kvs dt { color: var(--muted-2); font-family: var(--mono); font-size: .72rem; letter-spacing: .06em; text-transform: uppercase; align-self: center; }
.kvs dd { margin: 0; color: var(--off); }
.kvs dd.m { font-family: var(--mono); color: var(--white); }
.flowdown { display: grid; place-items: center; height: 26px; color: var(--muted-2); }
.flowdown svg { width: 16px; height: 16px; }

/* Status chips */
.chip { display: inline-flex; align-items: center; gap: 7px; font-family: var(--mono); font-size: .74rem; letter-spacing: .04em; padding: 5px 11px; border-radius: 999px; border: 1px solid var(--line); background: var(--ink-3); color: var(--off); text-transform: uppercase; }
.chip::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.chip.ok { color: var(--success); border-color: rgba(var(--success-rgb),.42); background: rgba(var(--success-rgb),.10); }
.chip.warn { color: var(--warning); border-color: rgba(var(--warning-rgb),.42); background: rgba(var(--warning-rgb),.10); }
.chip.bad { color: var(--red); border-color: rgba(var(--red-rgb),.42); background: rgba(var(--red-rgb),.10); }
.chip.info { color: var(--data); border-color: rgba(var(--data-rgb),.42); background: rgba(var(--data-rgb),.10); }

/* Architecture strip */
.arch { display: flex; align-items: stretch; gap: 0; flex-wrap: wrap; border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; background: var(--ink-2); }
.arch .node { flex: 1 1 200px; padding: 26px 24px; display: flex; flex-direction: column; gap: 8px; justify-content: center; border-right: 1px solid var(--line); }
.arch .node:last-child { border-right: none; }
.arch .node .n-k { font-family: var(--mono); font-size: .68rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted-2); }
.arch .node .n-t { font-family: var(--sans); font-weight: 600; color: var(--white); font-size: 1.05rem; }
.arch .node.hi { background: linear-gradient(180deg, rgba(var(--accent-rgb),.16), rgba(var(--accent-rgb),.04)); }
.arch .node.hi .n-t { color: var(--accent); }
.arch-note { margin-top: 18px; color: var(--muted); font-size: .95rem; }

/* How it works timeline */
.steps { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.step { display: flex; gap: 18px; padding: 22px; border: 1px solid var(--line-soft); border-radius: var(--r-md); background: var(--ink-2); }
.step .num { font-family: var(--mono); font-size: .8rem; color: var(--accent); border: 1px solid rgba(var(--accent-rgb),.40); border-radius: 8px; padding: 4px 8px; height: fit-content; letter-spacing: .06em; }
.step h3 { font-size: 1.08rem; margin-bottom: 6px; }
.step p { font-size: .93rem; margin: 0; }
.workflow-note { margin-top: 22px; padding: 16px 20px; border-left: 3px solid var(--accent); background: rgba(var(--accent-rgb),.07); border-radius: 0 10px 10px 0; color: var(--off); }

/* Product modules */
.mod { position: relative; overflow: hidden; }
.mod .num { position: absolute; top: 18px; right: 22px; font-family: var(--mono); color: var(--line); font-size: 2.2rem; font-weight: 500; }
.mod ul { margin: 14px 0 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 8px; }
.mod ul li { font-family: var(--mono); font-size: .72rem; color: var(--muted); border: 1px solid var(--line); border-radius: 7px; padding: 4px 9px; }

/* Requirement intelligence compare */
.req { display: grid; grid-template-columns: 1fr auto 1fr; gap: 20px; align-items: stretch; }
.req .col { background: var(--ink-2); border: 1px solid var(--line); border-radius: var(--r-md); padding: 22px; }
.req .arrowcol { display: grid; place-items: center; }
.req .arrowcol svg { width: 30px; height: 30px; color: var(--muted-2); }
.req .result { margin-top: 14px; }
.explain { margin-top: 14px; font-size: .92rem; color: var(--text-secondary); border-top: 1px dashed var(--line); padding-top: 12px; }
.resolve { margin-top: 22px; display: flex; align-items: center; gap: 14px; flex-wrap: wrap; padding: 16px 20px; border: 1px solid rgba(var(--success-rgb),.28); background: rgba(var(--success-rgb),.055); border-radius: var(--r-md); }

/* Reason matrix */
.reasons { display: flex; flex-wrap: wrap; gap: 10px; }

/* Supplier loop */
.loop { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.loop .lstep { background: var(--ink-2); border: 1px solid var(--line-soft); border-radius: var(--r-md); padding: 18px; font-size: .92rem; }
.loop .lstep .lk { font-family: var(--mono); font-size: .68rem; letter-spacing: .1em; color: var(--accent); text-transform: uppercase; display: block; margin-bottom: 6px; }

/* Roadmap */
.road { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; align-items: start; }
.road .zone { border: 1px solid var(--line); border-radius: var(--r-lg); padding: 26px; background: var(--ink-2); }
.road .zone.now { border-color: rgba(var(--accent-rgb),.42); }
.road .zone h3 { display: flex; align-items: center; gap: 10px; }
.road .badge { font-family: var(--mono); font-size: .64rem; letter-spacing: .1em; text-transform: uppercase; padding: 4px 8px; border-radius: 999px; }
.badge.b-now { background: rgba(var(--accent-rgb),.14); color: var(--accent); }
.badge.b-next { background: rgba(var(--data-rgb),.14); color: var(--data); }
.badge.b-vision { background: rgba(var(--copper-rgb),.14); color: var(--copper); }
.road ul { margin: 0; padding: 0; list-style: none; }
.road li { font-size: .9rem; color: var(--text-secondary); padding: 7px 0 7px 22px; position: relative; border-top: 1px solid var(--line-soft); }
.road li:first-child { border-top: none; }
.road li::before { content: ""; position: absolute; left: 0; top: 14px; width: 8px; height: 8px; border-radius: 2px; background: var(--accent); }
.road .zone.next li::before { background: var(--data); }
.road .zone.vision li::before { background: var(--copper); }
.vision-qs { margin-top: 14px; display: grid; gap: 8px; }
.vision-qs .q { font-family: var(--mono); font-size: .82rem; color: var(--off); background: var(--ink-3); border: 1px solid var(--line); border-radius: 8px; padding: 9px 12px; }

/* Editorial mission */
.editorial { background: linear-gradient(180deg, var(--ink-2), var(--ink)); border-top: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft); }
.editorial .big { font-family: var(--sans); font-weight: 600; font-size: clamp(1.5rem, 3.2vw, 2.4rem); line-height: 1.18; letter-spacing: -0.02em; color: var(--white); max-width: 22ch; }
.editorial h2.big { margin: 0 0 1rem; }

/* Use cases / industries */
.tiles { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.tile { border: 1px solid var(--line-soft); border-radius: var(--r-md); padding: 20px 22px; background: var(--ink-2); }
.tile h3 { font-size: 1.02rem; margin-bottom: 4px; }
.tile p { font-size: .9rem; margin: 0; }
.pills { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 6px; }
.pill { font-size: .82rem; color: var(--text-secondary); border: 1px solid var(--line); border-radius: 999px; padding: 6px 13px; background: var(--ink-2); }

/* Category diff */
.category .quote { font-family: var(--sans); font-weight: 500; font-size: clamp(1.2rem, 2.4vw, 1.7rem); line-height: 1.35; color: var(--white); letter-spacing: -0.01em; }

/* Trust controls */
.controls { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 26px; }
.controls li { list-style: none; display: flex; gap: 11px; align-items: flex-start; font-size: .93rem; color: var(--text-secondary); padding: 8px 0; border-bottom: 1px solid var(--line-soft); }
.controls li svg { width: 18px; height: 18px; color: var(--accent); flex: none; margin-top: 3px; }
.trust-note { margin-top: 18px; font-size: .88rem; color: var(--muted); }

/* CTA + form */
.cta { background:
  radial-gradient(800px 400px at 80% 0%, rgba(var(--accent-rgb),.16), transparent 60%),
  radial-gradient(700px 400px at 0% 100%, rgba(var(--data-rgb),.12), transparent 55%), var(--ink-2);
  border: 1px solid var(--line); border-radius: 24px; padding: clamp(32px, 5vw, 60px); }
.form { display: grid; gap: 16px; }
.form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field label { font-size: .84rem; color: var(--text-secondary); font-weight: 500; }
.field .req-star { color: var(--accent); }
.field input, .field select, .field textarea {
  background: var(--ink); border: 1px solid var(--line); border-radius: 10px; color: var(--white);
  padding: 12px 14px; font-family: var(--body); font-size: .96rem; width: 100%; transition: border-color .18s ease; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--accent); outline: none; }
.field textarea { min-height: 110px; resize: vertical; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-foot { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.privacy { font-size: .82rem; color: var(--muted); max-width: 46ch; }
.form-status { font-size: .92rem; padding: 12px 16px; border-radius: 10px; display: none; }
.form-status.show { display: block; }
.form-status.success { display: block; color: var(--success); background: rgba(var(--success-rgb),.10); border: 1px solid rgba(var(--success-rgb),.38); }
.form-status.error { display: block; color: var(--red); background: rgba(var(--red-rgb),.10); border: 1px solid rgba(var(--red-rgb),.38); }
.btn[aria-busy="true"] { opacity: .7; pointer-events: none; }

/* Footer */
.site-footer { border-top: 1px solid var(--line-soft); padding: 64px 0 40px; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; }
.foot-nav { display: flex; flex-wrap: wrap; gap: 12px 28px; }
.foot-nav a { color: var(--text-secondary); font-size: .92rem; }
.foot-nav a:hover { color: var(--white); }
.foot-meta { margin-top: 34px; padding-top: 22px; border-top: 1px solid var(--line-soft); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; color: var(--muted); font-size: .84rem; }

/* FAQ accordion */
details { border: 1px solid var(--line-soft); border-radius: var(--r-md); background: var(--ink-2); margin-bottom: 12px; overflow: hidden; }
details[open] { border-color: rgba(var(--accent-rgb),.35); }
summary { list-style: none; cursor: pointer; padding: 18px 22px; font-family: var(--sans); font-weight: 600; color: var(--white); font-size: 1.02rem; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; font-family: var(--mono); font-size: 1.4rem; color: var(--accent); line-height: 1; transition: transform .2s ease; flex: none; }
details[open] summary::after { transform: rotate(45deg); }
details p { margin: 0; padding: 0 22px 20px; font-size: .95rem; }

/* Reveal animations (progressive, respects reduced motion) */
.js .reveal { opacity: 0; transform: translateY(18px); }
.js .reveal.in { opacity: 1; transform: none; transition: opacity .6s ease, transform .6s cubic-bezier(.2,.7,.2,1); }
@media (prefers-reduced-motion: reduce) { .js .reveal { opacity: 1 !important; transform: none !important; } }


/* Theme toggle */
.sr-only { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.theme-toggle {
  width: 44px;
  height: 44px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--ink-2);
  color: var(--accent);
  display: inline-grid;
  place-items: center;
  cursor: pointer;
  flex: none;
  box-shadow: var(--shadow-soft);
  transition: transform .18s ease, border-color .2s ease, background-color .2s ease, color .2s ease;
}
.theme-toggle:hover { transform: translateY(-2px); border-color: rgba(var(--accent-rgb), .58); }
.theme-toggle:active { transform: translateY(0); }
.theme-icon { width: 20px; height: 20px; }
html[data-theme="dark"] .theme-icon-sun { display: block; }
html[data-theme="dark"] .theme-icon-moon { display: none; }
html[data-theme="light"] .theme-icon-sun { display: none; }
html[data-theme="light"] .theme-icon-moon { display: block; }

/* Deep Plum + Lavender + Copper theme refinements */
.card, .step, .tile, .road .zone, .req .col, details, .loop .lstep, .arch, .panel, .cta, .theme-toggle {
  transition-property: background-color, border-color, color, box-shadow, transform;
  transition-duration: .22s;
  transition-timing-function: ease;
}
html[data-theme="light"] .card { background: linear-gradient(180deg, #FFFFFF, var(--ink-2)); }
html[data-theme="light"] .evfx { background: linear-gradient(180deg, #F7F1FA, #EFE6F3); }
html[data-theme="light"] .site-header { box-shadow: 0 8px 30px -28px rgba(62, 40, 73, .6); }
html[data-theme="light"] .btn-ghost { background: rgba(255,255,255,.55); }
html[data-theme="light"] .chip { background: rgba(255,255,255,.62); }
html[data-theme="light"] .field input,
html[data-theme="light"] .field select,
html[data-theme="light"] .field textarea { background: #FFFFFF; }

/* Responsive */
@media (max-width: 1024px) {
  .g-4 { grid-template-columns: repeat(2, 1fr); }
  .road { grid-template-columns: 1fr; }
  .loop { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 860px) {
  .nav-links, .nav-cta .btn-ghost, .nav-cta .btn-primary { display: none; }
  .nav-toggle { display: inline-flex; }
  .split { grid-template-columns: 1fr; }
  .hero .evfx { order: 2; }
  .g-2, .g-3, .g-4 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .req { grid-template-columns: 1fr; }
  .req .arrowcol { transform: rotate(90deg); height: 30px; }
  .tiles { grid-template-columns: 1fr; }
  .controls { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; }
  .form .row { grid-template-columns: 1fr; }
  .loop { grid-template-columns: 1fr; }
  .arch .node { flex-basis: 100%; border-right: none; border-bottom: 1px solid var(--line); }
  .arch .node:last-child { border-bottom: none; }

  /* Mobile nav panel */
  .nav-links.open { display: flex; position: fixed; inset: 72px 0 auto 0; flex-direction: column; align-items: stretch; gap: 0;
    background: var(--ink); border-bottom: 1px solid var(--line); padding: 8px var(--pad) 20px; z-index: 99; }
  .nav-links.open a { padding: 15px 0; border-bottom: 1px solid var(--line-soft); font-size: 1.05rem; }
  .nav-links.open .btn { margin-top: 16px; justify-content: center; }
}
@media (min-width: 861px) { .nav-links .btn { display: none; } }

@media (max-width: 400px) {
  body { font-size: 16px; }
  .btn { padding: 12px 18px; }
}