/* ============================================================
   VIR HATCH — virhatch.com
   Static one-page site · dark industrial theme
   ============================================================ */

/* ---------- Fonts (self-hosted, variable, latin + greek subsets) ---------- */
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("../assets/fonts/inter-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("../assets/fonts/inter-greek.woff2") format("woff2");
  unicode-range: U+0370-0377, U+037A-037F, U+0384-038A, U+038C, U+038E-03A1, U+03A3-03FF;
}
@font-face {
  font-family: "JetBrains Mono";
  font-style: normal;
  font-weight: 100 800;
  font-display: swap;
  src: url("../assets/fonts/jetbrains-mono-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "JetBrains Mono";
  font-style: normal;
  font-weight: 100 800;
  font-display: swap;
  src: url("../assets/fonts/jetbrains-mono-greek.woff2") format("woff2");
  unicode-range: U+0370-0377, U+037A-037F, U+0384-038A, U+038C, U+038E-03A1, U+03A3-03FF;
}

/* ---------- Tokens ---------- */
:root {
  --bg: #0b0e13;
  --bg-alt: #0e1219;
  --surface: #121722;
  --surface-2: #171d2b;
  --line: rgba(148, 163, 184, 0.14);
  --line-strong: rgba(148, 163, 184, 0.28);

  --ink: #e8ecf3;
  --ink-2: #a8b3c4;
  --ink-3: #6b7689;

  --accent: #f0a232;          /* industrial amber */
  --accent-soft: rgba(240, 162, 50, 0.14);
  --ok: #3ecf8e;
  --warn: #f0a232;

  --font-sans: "Inter", -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "Cascadia Code", Consolas, Menlo, monospace;

  --container: 1180px;
  --radius: 10px;
  --radius-lg: 16px;

  --header-h: 64px;
}

/* ---------- Reset / base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }

h1, h2, h3, h4 {
  margin: 0 0 0.5em;
  line-height: 1.15;
  font-weight: 650;
  letter-spacing: -0.015em;
  text-wrap: balance;
}
p { margin: 0 0 1em; }
ul, ol, dl { margin: 0; padding: 0; }
li { list-style: none; }

a { color: var(--ink); text-decoration: none; }
a:hover { color: #fff; }

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

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 20px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--accent);
  color: #14100a;
  font-weight: 600;
  border-radius: 6px;
  transition: top 0.15s ease;
}
.skip-link:focus { top: 12px; color: #14100a; }

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  height: var(--header-h);
  background: rgba(11, 14, 19, 0.72);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease, background-color 0.25s ease;
}
.site-header.is-scrolled {
  background: rgba(11, 14, 19, 0.9);
  border-bottom-color: var(--line);
}

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
}
.brand-mark { color: var(--ink-2); flex: none; }
.brand-logo {
  height: 32px;
  width: auto;
  display: block;
  flex: none;
}
.footer-logo-row {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.footer-logo-row .brand-logo { height: 26px; }
.brand-name {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.14em;
  font-weight: 400;
  color: var(--ink-2);
  white-space: nowrap;
}
.brand-name strong { font-weight: 700; color: var(--ink); }

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-menu a {
  display: inline-block;
  padding: 8px 12px;
  font-size: 0.9rem;
  color: var(--ink-2);
  border-radius: 6px;
}
.nav-menu a:hover { color: var(--ink); }
.nav-menu .nav-cta {
  margin-left: 8px;
  padding: 8px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--ink);
}
.nav-menu .nav-cta:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  margin-left: 10px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
}
.lang-switch a {
  padding: 6px 7px;
  color: var(--ink-3);
  border-radius: 5px;
}
.lang-switch a:hover { color: var(--ink); }
.lang-switch a.is-active { color: var(--accent); }
.lang-sep { color: var(--line-strong); user-select: none; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: none;
  border: 0;
  cursor: pointer;
}
.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:first-child { transform: translateY(4px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:last-child  { transform: translateY(-4px) rotate(-45deg); }

@media (max-width: 820px) {
  .nav-toggle { display: flex; }
  .nav-menu {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 12px 20px 20px;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 24px 40px rgba(0, 0, 0, 0.5);
    display: none;
  }
  .site-nav.is-open .nav-menu { display: flex; }
  .nav-menu a { padding: 12px 8px; font-size: 1rem; }
  .nav-menu .nav-cta { margin: 10px 0 0; text-align: center; }
  .lang-switch { margin: 12px 0 0; justify-content: center; }
  .lang-switch a { padding: 8px 12px; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  border: 1px solid transparent;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--accent);
  color: #14100a;
}
.btn-primary:hover { background: #ffb84d; color: #14100a; }

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

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: calc(var(--header-h) + 64px) 0 72px;
  overflow: hidden;
}
.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(ellipse 70% 55% at 70% 8%, rgba(240, 162, 50, 0.07), transparent 62%),
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 100% 100%, 56px 56px, 56px 56px;
  -webkit-mask-image: linear-gradient(#000 55%, transparent);
  mask-image: linear-gradient(#000 55%, transparent);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  display: grid;
  gap: 48px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 20px;
}
.eyebrow-tick {
  width: 22px;
  height: 2px;
  background: var(--accent);
  flex: none;
}

.hero h1 {
  font-size: clamp(2.5rem, 6.5vw, 4.4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero-lead {
  max-width: 34rem;
  font-size: 1.1rem;
  color: var(--ink-2);
  margin-bottom: 32px;
}

.hero-tagline {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: -14px 0 30px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.hero-status {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0;
}
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

/* Telemetry panel */
.hero-panel {
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  overflow: hidden;
  font-family: var(--font-mono);
  max-width: 520px;
  width: 100%;
  justify-self: center;
}

.panel-chrome {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--line);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--ink-3);
}
.panel-state {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ok);
}
.led {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  display: inline-block;
}
.led-ok {
  background: var(--ok);
  box-shadow: 0 0 6px rgba(62, 207, 142, 0.7);
}

.panel-readouts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--line);
}
.readout {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 16px 16px;
}
.readout + .readout { border-left: 1px solid var(--line); }
.readout-label {
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.readout-value {
  font-size: clamp(1.15rem, 2.6vw, 1.5rem);
  font-weight: 600;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.readout-unit {
  font-size: 0.68rem;
  font-weight: 400;
  color: var(--ink-3);
  margin-left: 4px;
}
.readout-sp {
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  color: var(--ink-3);
}

.panel-spark { padding: 18px 20px 10px; }
.panel-spark svg { width: 100%; height: 72px; }
.spark-line {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
  stroke-linejoin: round;
  stroke-linecap: round;
  vector-effect: non-scaling-stroke;
}
.spark-sp {
  stroke: var(--line-strong);
  stroke-width: 1;
  stroke-dasharray: 5 5;
  vector-effect: non-scaling-stroke;
}
.panel-spark-meta {
  display: flex;
  justify-content: space-between;
  padding-top: 8px;
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  color: var(--ink-3);
}

.panel-footrow {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 20px;
  border-top: 1px solid var(--line);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--ink-3);
}
.panel-footrow strong {
  color: var(--ink);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

@media (min-width: 960px) {
  .hero { padding: calc(var(--header-h) + 96px) 0 110px; }
  .hero-inner { grid-template-columns: 1.1fr 0.9fr; gap: 64px; }
  .hero-panel { justify-self: end; }
}

/* ---------- Sections ---------- */
.section { padding: 88px 0; }
.section-alt {
  background: var(--bg-alt);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-index {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}
.section-head { max-width: 44rem; margin-bottom: 52px; }
.section-head h2, .split-copy h2, .contact-inner h2 {
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  letter-spacing: -0.025em;
}
.section-lead {
  color: var(--ink-2);
  font-size: 1.05rem;
  margin-bottom: 0;
}

.visual-caption {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--ink-3);
  margin: 14px 2px 0;
}

/* ---------- 01 Param grid ---------- */
.param-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}
@media (min-width: 640px)  { .param-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1000px) { .param-grid { grid-template-columns: repeat(3, 1fr); } }

.param-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px;
  transition: border-color 0.25s ease, transform 0.25s ease;
}
.param-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}
.param-icon {
  width: 34px;
  height: 34px;
  color: var(--ink-2);
  margin-bottom: 18px;
}
.param-card h3 { font-size: 1.08rem; margin-bottom: 8px; }
.visually-plain { font-weight: 400; color: var(--ink-3); font-size: 0.85em; }
.param-card p { color: var(--ink-2); font-size: 0.94rem; margin: 0; }

.param-card-note {
  background: linear-gradient(160deg, rgba(240, 162, 50, 0.1), rgba(240, 162, 50, 0.03));
  border-color: rgba(240, 162, 50, 0.35);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.param-note-line {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
  margin-bottom: 10px;
}

/* ---------- 02 Controller split ---------- */
.split {
  display: grid;
  gap: 48px;
  align-items: center;
}
@media (min-width: 960px) {
  .split { grid-template-columns: 1fr 1fr; gap: 72px; }
}

.split-copy .section-lead { margin-bottom: 34px; }

.feature-list { display: grid; gap: 22px; }
.feature-list li {
  padding-left: 18px;
  border-left: 2px solid var(--line-strong);
}
.feature-list h3 { font-size: 1.02rem; margin-bottom: 4px; }
.feature-list p { color: var(--ink-2); font-size: 0.92rem; margin: 0; }

.controller-art {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}
.controller-art svg { width: 100%; height: auto; }

.ca-body    { fill: #0d1119; }
.ca-outline { stroke: var(--line-strong); stroke-width: 1.5; fill: none; }
.ca-screen  { fill: #080b10; stroke: var(--line); }
.ca-screen-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 3px;
  fill: var(--ink-3);
}
.ca-screen-value {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 600;
  fill: var(--accent);
}
.ca-screen-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 1px;
  fill: var(--ink-2);
}
.ca-screen-bar { fill: var(--accent); opacity: 0.55; }
.ca-led-ok  { fill: var(--ok); }
.ca-led-dim { fill: #2a3242; }
.ca-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 2px;
  fill: var(--ink-3);
}
.ca-tag-accent { fill: var(--accent); }
.ca-termbed { fill: #0a0d13; stroke: var(--line); }

/* ---------- 03 Control loop ---------- */
.loop-flow {
  display: grid;
  gap: 14px;
  counter-reset: loopstep;
}
@media (min-width: 720px) { .loop-flow { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1040px) { .loop-flow { grid-template-columns: repeat(4, 1fr); } }

.loop-step {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 22px;
}
.loop-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--accent);
  border: 1px solid rgba(240, 162, 50, 0.4);
  border-radius: 4px;
  padding: 3px 8px;
  margin-bottom: 16px;
}
.loop-step h3 { font-size: 1.05rem; margin-bottom: 6px; }
.loop-step p { color: var(--ink-2); font-size: 0.92rem; margin: 0; }

/* ---------- 04 Chain ---------- */
.chain {
  display: grid;
  gap: 0;
  max-width: 720px;
}
.chain-node {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 24px;
  margin-bottom: 34px;
}
.chain-node:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 32px;
  bottom: -35px;
  width: 2px;
  height: 34px;
  background: linear-gradient(var(--line-strong), var(--line));
}
.chain-node-core {
  border-color: rgba(240, 162, 50, 0.4);
  background: linear-gradient(160deg, rgba(240, 162, 50, 0.08), var(--surface));
}
.chain-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 3px 10px;
  margin-bottom: 12px;
}
.chain-tag-dev {
  color: var(--accent);
  border-color: rgba(240, 162, 50, 0.45);
  background: rgba(240, 162, 50, 0.08);
}
.chain-tag-plan { color: var(--ink-2); }
.tag-avail {
  color: var(--ok);
  border-color: rgba(62, 207, 142, 0.4);
  background: rgba(62, 207, 142, 0.07);
}
.section-index .chain-tag { margin: 0 0 0 12px; vertical-align: middle; }
.chain-node h3 { font-size: 1.08rem; margin-bottom: 4px; }
.chain-node p { color: var(--ink-2); font-size: 0.93rem; margin: 0; }

.chain-note {
  max-width: 720px;
  margin-top: 6px;
  padding: 16px 20px;
  border-left: 2px solid var(--accent);
  color: var(--ink-2);
  font-size: 0.95rem;
  background: var(--surface);
  border-radius: 0 var(--radius) var(--radius) 0;
}

@media (min-width: 1000px) {
  .chain {
    max-width: none;
    grid-template-columns: repeat(5, 1fr);
    gap: 40px;
  }
  .chain-node { margin-bottom: 0; }
  .chain-node:not(:last-child)::after {
    left: auto;
    right: -41px;
    top: 50%;
    bottom: auto;
    width: 42px;
    height: 2px;
    background: linear-gradient(90deg, var(--line-strong), var(--line));
  }
  .chain-note { max-width: none; margin-top: 40px; }
}

/* ---------- 05 UI mock ---------- */
.ui-mock {
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.4);
}
.ui-chrome {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
  background: var(--surface-2);
}
.ui-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #2a3242;
}
.ui-chrome-title {
  margin-left: 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--ink-3);
}

.ui-body {
  display: grid;
  grid-template-columns: 1fr;
}
@media (min-width: 880px) {
  .ui-body { grid-template-columns: 1fr 280px; }
}

.ui-main { padding: 22px; min-width: 0; }

.ui-kpis {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}
@media (min-width: 640px) { .ui-kpis { grid-template-columns: repeat(4, 1fr); } }

.ui-kpi {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.ui-kpi-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.ui-kpi-value {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
}
.ui-kpi-value small { font-size: 0.68rem; font-weight: 400; color: var(--ink-3); }
.ui-kpi-delta { font-size: 0.72rem; color: var(--ink-3); }
.ui-kpi-delta.ui-ok { color: var(--ok); }

.ui-chart {
  margin: 0;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px 16px 12px;
}
.ui-chart-title {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 12px;
}
.ui-chart svg { width: 100%; height: 180px; }
.ui-grid line { stroke: var(--line); stroke-width: 1; vector-effect: non-scaling-stroke; }
.ui-spline {
  stroke: var(--line-strong);
  stroke-width: 1;
  stroke-dasharray: 5 5;
  vector-effect: non-scaling-stroke;
}
.ui-trend {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
  stroke-linejoin: round;
  stroke-linecap: round;
  vector-effect: non-scaling-stroke;
}
.ui-chart-axis {
  display: flex;
  justify-content: space-between;
  padding-top: 8px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--ink-3);
}

.ui-side {
  border-top: 1px solid var(--line);
  padding: 22px;
  background: var(--surface-2);
}
@media (min-width: 880px) {
  .ui-side { border-top: 0; border-left: 1px solid var(--line); }
}
.ui-side-title {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 12px;
}
.ui-side-title + .ui-config { margin-top: 0; }

.ui-events { display: grid; gap: 10px; margin-bottom: 24px; }
.ui-events li {
  display: flex;
  align-items: baseline;
  gap: 9px;
  font-size: 0.8rem;
  color: var(--ink-2);
}
.ui-ev-dot {
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  align-self: center;
}
.ui-ev-ok   { background: var(--ok); }
.ui-ev-warn { background: var(--warn); }
.ui-ev-text { flex: 1; min-width: 0; }
.ui-ev-time {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--ink-3);
}

.ui-config { display: grid; gap: 8px; }
.ui-config div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.8rem;
}
.ui-config dt { color: var(--ink-3); }
.ui-config dd {
  margin: 0;
  color: var(--ink-2);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.soft-points {
  display: grid;
  gap: 16px;
  margin-top: 40px;
}
@media (min-width: 640px)  { .soft-points { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1000px) { .soft-points { grid-template-columns: repeat(4, 1fr); } }
.soft-points li {
  padding: 18px 20px;
  border-left: 2px solid var(--line-strong);
}
.soft-points h3 { font-size: 0.98rem; margin-bottom: 4px; }
.soft-points p { color: var(--ink-2); font-size: 0.88rem; margin: 0; }

/* ---------- 06 Engineering ---------- */
.eng-grid {
  display: grid;
  gap: 16px;
}
@media (min-width: 720px) { .eng-grid { grid-template-columns: repeat(2, 1fr); } }

.eng-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 26px;
}
.eng-index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--accent);
  margin-bottom: 14px;
}
.eng-item h3 { font-size: 1.12rem; margin-bottom: 8px; }
.eng-item p { color: var(--ink-2); font-size: 0.94rem; margin: 0; }

/* ---------- 07 Contact ---------- */
.section-contact {
  position: relative;
  padding: 110px 0;
  overflow: hidden;
}
.section-contact::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 70% at 50% 110%, rgba(240, 162, 50, 0.08), transparent 65%);
  pointer-events: none;
}
.contact-inner {
  position: relative;
  max-width: 46rem;
}
.contact-audiences {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 28px 0 34px;
}
.contact-audiences li {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--ink-2);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 7px 15px;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 36px 0;
  background: var(--bg-alt);
}
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.footer-sub { font-size: 0.82rem; color: var(--ink-3); }
.footer-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.8rem;
  color: var(--ink-3);
  font-family: var(--font-mono);
}
@media (min-width: 720px) {
  .footer-inner {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
  }
  .footer-meta { text-align: right; }
}

/* ---------- Reveal animations (progressive enhancement) ---------- */
html.js .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
html.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  html.js .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  *, *::before, *::after {
    animation-duration: 0.001s !important;
    transition-duration: 0.001s !important;
  }
}