/* ============================================================
   Duke Electric Vehicles / styles.css
   Materials lab: carbon ground, strict Duke navy + white,
   specimen-framed photography, mono annotation system
   ============================================================ */

:root {
  --carbon-950: #07090d;
  --carbon-900: #0b0e14;
  --carbon-800: #12161f;
  --carbon-700: #1a2029;
  --navy: #012169;
  --navy-600: #1b3e8f;
  --navy-400: #3d63b8;
  --navy-300: #7d97d6;
  --white: #f4f6fa;
  --mist: #a9b2c1;
  --dim: #6d7686;
  --line: rgba(244, 246, 250, 0.14);
  --line-strong: rgba(244, 246, 250, 0.32);
  --font-d: "Archivo", sans-serif;
  --mono: "IBM Plex Mono", monospace;
  --max-w: 1240px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--carbon-950);
  color: var(--white);
  font-family: var(--font-d);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--navy-300); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 28px; }

::selection { background: var(--navy); color: var(--white); }

/* ---------- Typography ---------- */
h1, h2, h3 { font-family: var(--font-d); line-height: 1.05; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.8rem, 7vw, 5.4rem); font-weight: 700; text-transform: uppercase; }
h2 { font-size: clamp(1.8rem, 3.6vw, 2.7rem); font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 600; letter-spacing: -0.01em; }

p { color: var(--mist); }
strong { color: var(--white); font-weight: 600; }
em { color: var(--white); }

.lead { font-size: 1.15rem; max-width: 58ch; color: var(--mist); }

.mono-label {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
}
.mono-label .ix { color: var(--navy-300); }

/* Section label with extending hairline */
.sec-label {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 48px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--white);
}
.sec-label::before { content: "/"; color: var(--navy-300); }
.sec-label::after { content: ""; flex: 1; height: 1px; background: var(--line); }

/* The waterline: the car's navy pinstripe, as a page element */
.waterline { height: 2px; background: var(--navy-400); }

/* ---------- Navigation ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 22px 0;
  transition: background 0.3s, padding 0.3s, border-color 0.3s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(7, 9, 13, 0.9);
  backdrop-filter: blur(10px);
  padding: 14px 0;
  border-bottom-color: var(--line);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.24em;
  color: var(--white);
}
.nav-logo:hover { text-decoration: none; color: var(--white); }
.mark {
  width: 24px;
  height: 13px;
  border-top: 3px solid var(--navy-400);
  border-bottom: 3px solid var(--navy-400);
  transition: border-color 0.25s;
}
.nav-logo:hover .mark { border-color: var(--navy-300); }
.nav-logo .logo-img { height: 40px; width: auto; display: block; }

.nav-links { display: flex; align-items: center; gap: 34px; list-style: none; }
.nav-links a {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
  position: relative;
  padding: 4px 0;
  transition: color 0.2s;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  background: var(--navy-400);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s;
}
.nav-links a:hover, .nav-links a.active { color: var(--white); text-decoration: none; }
.nav-links a:hover::after, .nav-links a.active::after { transform: scaleX(1); }

.nav-cta {
  border: 1px solid var(--line-strong);
  padding: 8px 18px !important;
  color: var(--white) !important;
}
.nav-cta::after { display: none; }
.nav-cta:hover { background: var(--navy); border-color: var(--navy); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  color: var(--white);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  padding: 8px 12px;
  cursor: pointer;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 16px 32px;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  border: 1px solid var(--line-strong);
  color: var(--white);
  background: transparent;
  transition: color 0.35s, border-color 0.35s;
}
.btn span { position: relative; z-index: 1; }
.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--navy);
  transform: translateX(-101%);
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}
.btn:hover { text-decoration: none; border-color: var(--navy); }
.btn:hover::before { transform: none; }

.btn-solid { background: var(--white); color: var(--carbon-950); border-color: var(--white); }
.btn-solid:hover { color: var(--white); }

.btn:focus-visible, a:focus-visible, button:focus-visible {
  outline: 2px solid var(--navy-300);
  outline-offset: 3px;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  background: var(--carbon-950);
}
.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(0.35) brightness(0.72);
}
.hero-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 9, 13, 0.45) 0%, rgba(7, 9, 13, 0.05) 40%, rgba(7, 9, 13, 0.92) 100%);
}
.hero-inner {
  position: relative;
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 160px 28px 72px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 48px;
}
.hero-copy .mono-label { margin-bottom: 22px; display: block; }
.hero-copy .lead { margin: 26px 0 36px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-spec {
  flex: none;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
  border-left: 2px solid var(--navy-400);
  padding-left: 16px;
  line-height: 2.1;
  white-space: nowrap;
}
.hero-spec b { color: var(--white); font-weight: 500; }

.hero-sub { min-height: 72svh; }

/* ---------- Stat strip ---------- */
.stat-strip { border-top: 2px solid var(--navy-400); border-bottom: 1px solid var(--line); background: var(--carbon-900); }
.stat-strip .container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.stat { padding: 46px 28px; border-left: 1px solid var(--line); transition: background 0.3s; }
.stat:first-child { border-left: none; }
.stat:hover { background: var(--carbon-800); }
.stat-value {
  font-family: var(--font-d);
  font-size: clamp(2.2rem, 3.6vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--white);
  transition: color 0.3s;
}
.stat:hover .stat-value { color: var(--navy-300); }
.stat-value .unit {
  font-family: var(--mono);
  font-size: 0.4em;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--mist);
  margin-left: 6px;
}
.stat-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
  margin-top: 10px;
}

/* ---------- Sections ---------- */
section { padding: 110px 0; }
.section-alt { background: var(--carbon-900); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { max-width: 760px; margin-bottom: 24px; }
.section-head p { margin-top: 20px; font-size: 1.08rem; }

/* ---------- Specimen figure: the signature ---------- */
.specimen { display: block; }
.spec-frame {
  position: relative;
  border: 1px solid var(--line);
  padding: 10px;
  background: var(--carbon-900);
}
.spec-frame::before, .spec-frame::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  transition: width 0.35s, height 0.35s, border-color 0.35s;
  z-index: 2;
}
.spec-frame::before { top: -1px; left: -1px; border-top: 2px solid var(--white); border-left: 2px solid var(--white); }
.spec-frame::after { bottom: -1px; right: -1px; border-bottom: 2px solid var(--white); border-right: 2px solid var(--white); }
.spec-frame img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: grayscale(1) contrast(1.05);
  transition: filter 0.5s, transform 0.5s;
}
.spec-frame.tall img { aspect-ratio: 3 / 4; }
.spec-frame.fit img { aspect-ratio: auto; height: auto; object-fit: contain; }
.spec-frame.wide img { aspect-ratio: 21 / 9; }
.specimen:hover .spec-frame img, .specimen:focus-visible .spec-frame img { filter: none; transform: scale(1.015); }
.specimen:hover .spec-frame::before, .specimen:hover .spec-frame::after {
  width: 36px;
  height: 36px;
  border-color: var(--navy-300);
}
.spec-cap {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-top: 12px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dim);
  transition: color 0.3s;
}
.spec-cap .id { color: var(--navy-300); flex: none; }
.specimen:hover .spec-cap { color: var(--mist); }

/* Placeholder for missing specimens */
.img-fallback {
  aspect-ratio: 4 / 3;
  display: grid;
  place-content: center;
  gap: 8px;
  text-align: center;
  background:
    repeating-linear-gradient(45deg, transparent 0 14px, rgba(244, 246, 250, 0.03) 14px 15px),
    var(--carbon-800);
  border: 1px dashed var(--line-strong);
  color: var(--dim);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 24px;
}
.img-fallback::before { content: "awaiting specimen"; color: var(--navy-300); }

/* ---------- Shelf: specimen gallery row ---------- */
.shelf {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.shelf .spec-frame img { aspect-ratio: 1 / 1; }

/* ---------- Split layout ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}
.split.reverse > .split-media { order: 2; }
.split-content h2 { margin-bottom: 20px; }
.split-content p { margin-bottom: 16px; }
.split-content .btn { margin-top: 12px; }

/* ---------- Record cards ---------- */
.card-grid { display: grid; gap: 20px; }
.cols-2 { grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); }
.cols-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }

.card {
  border: 1px solid var(--line);
  background: transparent;
  transition: background 0.3s, border-color 0.3s, transform 0.3s;
  display: block;
  color: inherit;
}
.card:hover {
  background: var(--carbon-800);
  border-color: var(--line-strong);
  transform: translateY(-4px);
  text-decoration: none;
}
.card-body { padding: 28px; }
.card-body h3 { margin-bottom: 12px; color: var(--white); }
.card-body p { font-size: 0.98rem; }
.card .specimen { pointer-events: none; }
.card:hover .spec-frame img { filter: none; }
.card:hover .spec-frame::before, .card:hover .spec-frame::after {
  width: 36px; height: 36px; border-color: var(--navy-300);
}
.card .spec-frame { border-left: none; border-right: none; border-top: none; }
.card-link {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--navy-300);
  display: inline-block;
  margin-top: 16px;
}

.record-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 18px;
}
.record-tag::before { content: ""; width: 9px; height: 9px; background: var(--navy-400); flex: none; }

/* ---------- Data plate (spec table) ---------- */
.plate { border: 1px solid var(--line); margin-top: 28px; background: var(--carbon-900); }
.plate-head {
  display: flex;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--navy-300);
}
.plate table { width: 100%; border-collapse: collapse; }
.plate td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  font-size: 0.94rem;
  transition: background 0.2s, box-shadow 0.2s;
}
.plate tr:last-child td { border-bottom: none; }
.plate td:first-child {
  color: var(--dim);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  width: 42%;
}
.plate td:last-child { font-weight: 500; color: var(--mist); }
.plate tr:hover td { background: var(--carbon-800); }
.plate tr:hover td:first-child { box-shadow: inset 2px 0 0 var(--navy-400); color: var(--mist); }
.plate tr:hover td:last-child { color: var(--white); }
.plate .hl td:last-child { color: var(--white); }

/* ---------- Efficiency comparison ---------- */
.eff-compare { margin-top: 48px; display: flex; flex-direction: column; gap: 24px; }
.eff-row {
  display: grid;
  grid-template-columns: 200px 1fr 120px;
  gap: 18px;
  align-items: center;
}
.eff-name {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
}
.eff-track { background: var(--carbon-800); border: 1px solid var(--line); height: 16px; }
.eff-bar {
  height: 100%;
  width: 0;
  background: var(--navy-600);
  transition: width 1.4s cubic-bezier(0.22, 1, 0.36, 1);
}
.eff-bar.lead-bar { background: var(--white); }
.eff-val {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--mist);
  text-align: right;
}
.eff-row.lead-row .eff-name, .eff-row.lead-row .eff-val { color: var(--white); }

/* ---------- Big callout ---------- */
.big-callout { text-align: center; padding: 10px 0 30px; }
.big-callout .huge {
  font-family: var(--font-d);
  font-size: clamp(4.5rem, 13vw, 10rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--white);
}
.big-callout .huge .slash { color: var(--navy-400); }
.big-callout p { margin-top: 16px; font-size: 1.1rem; }

/* ---------- Timeline ---------- */
.timeline { position: relative; margin-top: 30px; padding-left: 42px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 5px; top: 8px; bottom: 8px;
  width: 1px;
  background: var(--line-strong);
}
.timeline-item { position: relative; padding-bottom: 52px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -42px; top: 8px;
  width: 11px; height: 11px;
  background: var(--carbon-950);
  border: 2px solid var(--mist);
  transition: transform 0.25s, border-color 0.25s, background 0.25s;
}
.timeline-item:hover::before { transform: scale(1.35); border-color: var(--navy-300); }
.timeline-item.milestone::before { background: var(--navy-400); border-color: var(--navy-400); }
.timeline-year {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--navy-300);
}
.timeline-item h3 { margin: 8px 0 8px; }
.timeline-item p { font-size: 0.98rem; max-width: 62ch; }
.timeline-item.milestone h3::after {
  content: "record";
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--carbon-950);
  background: var(--white);
  padding: 3px 8px;
  margin-left: 12px;
  vertical-align: middle;
}

/* ---------- Inspection checklist ---------- */
.check-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin-top: 40px;
}
.check-item {
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--line);
  padding: 14px 16px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mist);
  transition: border-color 0.25s, color 0.25s, background 0.25s;
}
.check-item:hover { border-color: var(--navy-400); color: var(--white); background: var(--carbon-800); }
.check-item .tick {
  flex: none;
  width: 18px; height: 18px;
  background: var(--navy);
  color: var(--white);
  display: grid;
  place-items: center;
  font-size: 11px;
}

/* ---------- Sponsors ---------- */
.logo-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px 60px;
  align-items: center;
  margin-top: 44px;
  background: var(--white);
  padding: 40px 48px;
}
.sponsor-name {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dim);
  transition: color 0.25s;
  cursor: default;
}
.sponsor-name:hover { color: var(--white); }

.sponsor-logo { display: flex; align-items: center; }
.sponsor-logo img {
  height: 72px;
  width: auto;
}
.sponsor-logo .img-fallback {
  aspect-ratio: auto;
  padding: 10px 18px;
  font-size: 12px;
  color: #3a4150;
  background: none;
  border-color: rgba(7, 9, 13, 0.35);
}
.sponsor-logo .img-fallback::before { content: none; }

.tier-card { position: relative; }
.tier-price {
  font-family: var(--font-d);
  font-size: 2rem;
  font-weight: 700;
  color: var(--white);
  margin: 6px 0 18px;
}
.tier-card ul { list-style: none; margin-top: 8px; }
.tier-card ul li {
  padding: 9px 0 9px 26px;
  position: relative;
  color: var(--mist);
  font-size: 0.94rem;
  border-bottom: 1px solid var(--line);
}
.tier-card ul li:last-child { border-bottom: none; }
.tier-card ul li::before {
  content: "";
  position: absolute;
  left: 2px; top: 16px;
  width: 8px; height: 8px;
  background: var(--navy-400);
}
.tier-featured { border-color: var(--navy-400); }
.tier-tag {
  position: absolute;
  top: -12px; left: 24px;
  background: var(--navy);
  color: var(--white);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 4px 12px;
}

/* ---------- Document plate (brochure download) ---------- */
.doc-plate {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--navy-400);
  background: var(--carbon-900);
  padding: 26px 30px;
  transition: border-color 0.25s, background 0.25s;
}
.doc-plate:hover { background: var(--carbon-800); border-color: var(--line-strong); border-left-color: var(--navy-300); }
.doc-name { font-family: var(--font-d); font-weight: 600; font-size: 1.15rem; display: block; }
.doc-info {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dim);
  margin-top: 4px;
  display: block;
}

/* ---------- CTA band ---------- */
.cta-band {
  background: var(--navy);
  border-top: 2px solid var(--navy-400);
  padding: 80px 48px;
  text-align: center;
}
.cta-band h2 { margin-bottom: 16px; }
.cta-band p { color: rgba(244, 246, 250, 0.75); max-width: 56ch; margin: 0 auto 36px; }
.cta-band .hero-actions { justify-content: center; }
.cta-band .btn { border-color: rgba(244, 246, 250, 0.4); }
.cta-band .btn::before { background: var(--white); }
.cta-band .btn:hover { color: var(--navy); border-color: var(--white); }
.cta-band .btn-solid { border-color: var(--white); }

/* ---------- Footer ---------- */
footer { border-top: 1px solid var(--line); background: var(--carbon-900); padding: 64px 0 36px; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-grid h4 {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 18px;
  color: var(--white);
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer-grid h4 .logo-img { height: 24px; width: auto; }
.footer-grid p, .footer-grid a { color: var(--dim); font-size: 0.94rem; }
.footer-grid a:hover { color: var(--white); }
.footer-grid ul { list-style: none; }
.footer-grid ul li { margin-bottom: 10px; }
.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 26px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
}

/* ---------- Scroll reveal (JS-gated) ---------- */
.js .reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
.js .reveal.visible { opacity: 1; transform: none; }
.js .reveal-delay-1 { transition-delay: 0.12s; }
.js .reveal-delay-2 { transition-delay: 0.24s; }

@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .spec-frame img, .btn::before, .eff-bar { transition: none; }
}

/* Touch devices: photography shows in full color */
@media (hover: none) {
  .spec-frame img { filter: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  section { padding: 72px 0; }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .split.reverse > .split-media { order: 0; }
  .shelf { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .eff-row { grid-template-columns: 120px 1fr 96px; }
  .hero-spec { display: none; }
  .hero-inner { padding-top: 130px; }

  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    align-items: flex-start;
    background: rgba(7, 9, 13, 0.98);
    border-bottom: 1px solid var(--line);
    padding: 26px 28px;
    gap: 20px;
  }
  .nav-links.open { display: flex; }
  .nav { background: rgba(7, 9, 13, 0.94); }
}