/* ==========================================================================
   TRIUMPHUMS — B2B inquiry site
   Design: Nordic industrial dark · Space Grotesk / Inter · signal orange
   ========================================================================== */

:root {
  --bg: #0a0b0d;
  --bg-raise: #0e1013;
  --bg-card: #101318;
  --ink: #edede8;
  --ink-soft: #b7bab6;
  --ink-mute: #7d817e;
  --line: rgba(237, 237, 232, 0.09);
  --line-strong: rgba(237, 237, 232, 0.16);
  --accent: #ff5a1f;
  --accent-soft: rgba(255, 90, 31, 0.14);
  --accent-line: rgba(255, 90, 31, 0.38);
  --tile-hi: #ffffff;
  --tile-lo: #ffffff;
  --font-display: "Space Grotesk", "Inter", -apple-system, sans-serif;
  --font-body: "Inter", -apple-system, "Segoe UI", sans-serif;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --radius: 18px;
  --container: 1200px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection { background: var(--accent); color: #0a0b0d; }

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font: inherit; cursor: pointer; background: none; border: none; color: inherit; }

.container {
  width: min(var(--container), calc(100% - 48px));
  margin-inline: auto;
}

/* ---------- typography ---------- */

h1, h2, h3, .display {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.08;
  text-wrap: balance;
}

.h1 { font-size: clamp(2.55rem, 5.2vw, 4.4rem); letter-spacing: -0.032em; }
.h2 { font-size: clamp(2rem, 4.2vw, 3.2rem); }
.h3 { font-size: 1.35rem; letter-spacing: -0.015em; }

.lead {
  font-size: clamp(1.05rem, 1.5vw, 1.22rem);
  color: var(--ink-soft);
  max-width: 56ch;
  text-wrap: pretty;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.eyebrow::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 1px;
  background: var(--accent);
  transform: rotate(45deg);
  flex: none;
}

.mono-tag {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 30px;
  border-radius: 10px;
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: transform 0.25s var(--ease-out), background 0.25s, border-color 0.25s, box-shadow 0.25s;
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--accent);
  color: #140700;
  box-shadow: 0 0 0 0 rgba(255, 90, 31, 0);
}
.btn-primary:hover {
  background: #ff7441;
  box-shadow: 0 8px 32px -8px rgba(255, 90, 31, 0.45);
  transform: translateY(-1px);
}

.btn-ghost {
  border: 1px solid var(--line-strong);
  color: var(--ink);
  background: rgba(237, 237, 232, 0.02);
}
.btn-ghost:hover { border-color: rgba(237, 237, 232, 0.36); background: rgba(237, 237, 232, 0.05); }

.btn .arrow { transition: transform 0.25s var(--ease-out); }
.btn:hover .arrow { transform: translateX(4px); }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--accent);
}
.link-arrow .arrow { transition: transform 0.25s var(--ease-out); }
.link-arrow:hover .arrow { transform: translateX(4px); }

a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- header ---------- */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: 76px;
  display: flex;
  align-items: center;
  transition: background 0.35s, border-color 0.35s, height 0.35s;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  height: 64px;
  background: rgba(10, 11, 13, 0.78);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  backdrop-filter: blur(18px) saturate(1.4);
  border-bottom-color: var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand { display: flex; align-items: center; gap: 12px; flex: none; }
.brand-mark {
  width: 34px; height: 34px;
  display: grid; place-items: center;
  background: var(--accent);
  border-radius: 8px;
  color: #140700;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  box-shadow: 0 2px 20px -4px rgba(255, 90, 31, 0.5);
}
.brand-text { line-height: 1.05; }
.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: 0.14em;
}
.brand-sub {
  font-size: 0.58rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a {
  padding: 9px 16px;
  border-radius: 8px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--ink-soft);
  transition: color 0.2s, background 0.2s;
}
.main-nav a:hover { color: var(--ink); background: rgba(237, 237, 232, 0.05); }
.main-nav a.active { color: var(--ink); }

.header-cta { flex: none; }
.header-cta .btn { padding: 12px 22px; font-size: 0.85rem; }

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  place-items: center;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span {
  display: block; width: 18px; height: 1.5px;
  background: var(--ink);
  transition: transform 0.3s var(--ease-out), opacity 0.2s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ---------- hero ---------- */

.hero {
  position: relative;
  padding: 148px 0 78px;
  background:
    radial-gradient(58% 46% at 78% 30%, rgba(255, 90, 31, 0.07), transparent 70%),
    radial-gradient(40% 34% at 12% 82%, rgba(255, 90, 31, 0.04), transparent 70%),
    var(--bg);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(70% 62% at 50% 32%, #000 0%, transparent 78%);
  mask-image: radial-gradient(70% 62% at 50% 32%, #000 0%, transparent 78%);
  opacity: 0.5;
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 64px;
  align-items: center;
}

.hero-copy .eyebrow { margin-bottom: 20px; }
.hero-copy .h1 { margin-bottom: 20px; }
.hero-copy .h1 em {
  font-style: normal;
  color: var(--accent);
}
.hero-copy .lead { margin-bottom: 32px; }

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-visual { position: relative; }
.hero-card {
  position: relative;
  border-radius: 26px;
  background: radial-gradient(120% 110% at 50% 0%, var(--tile-hi) 0%, var(--tile-lo) 100%);
  padding: 5%;
  box-shadow: 0 40px 90px -30px rgba(0, 0, 0, 0.8), inset 0 0 0 1px rgba(255, 255, 255, 0.5);
}
.hero-card img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: contain;
  mix-blend-mode: multiply;
  transition: transform 0.8s var(--ease-out);
}
.hero-card:hover img { transform: scale(1.03); }

.hero-card .float-tag {
  position: absolute;
  display: flex; align-items: center; gap: 9px;
  padding: 11px 16px;
  background: rgba(10, 11, 13, 0.86);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.hero-card .float-tag .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px 2px rgba(255, 90, 31, 0.7);
  flex: none;
}
.hero-card .tag-1 { top: 12%; left: -4%; }
.hero-card .tag-2 { bottom: 12%; right: -4%; }

/* ---------- stats ---------- */

.stats-band {
  border-block: 1px solid var(--line);
  background: var(--bg-raise);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.stat {
  padding: 40px 34px;
  border-left: 1px solid var(--line);
}
.stat:first-child { border-left: 0; padding-left: 0; }
.stat .num {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.4vw, 2.8rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1;
}
.stat .num sup { color: var(--accent); font-size: 0.55em; top: -0.55em; }
.stat .label {
  margin-top: 10px;
  font-size: 0.85rem;
  color: var(--ink-mute);
  letter-spacing: 0.02em;
}

/* ---------- sections ---------- */

.section { padding: clamp(88px, 11vw, 132px) 0; }
.section.tight { padding: clamp(64px, 8vw, 96px) 0; }
.section.alt { background: var(--bg-raise); border-block: 1px solid var(--line); }

.section-head { margin-bottom: clamp(44px, 6vw, 64px); }
.section-head .eyebrow { margin-bottom: 18px; }
.section-head .h2 { margin-bottom: 18px; max-width: 22ch; }
.section-head .lead { max-width: 62ch; }
.section-head.row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
}
.section-head.row > div { margin-bottom: 0; }

/* ---------- category strip ---------- */

.cat-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.cat-chip {
  display: flex; align-items: center; justify-content: space-between;
  padding: 22px 24px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.25s, transform 0.3s var(--ease-out), background 0.25s;
}
.cat-chip:hover {
  border-color: var(--accent-line);
  transform: translateY(-3px);
  background: #13161b;
}
.cat-chip .name { font-family: var(--font-display); font-weight: 600; font-size: 0.98rem; }
.cat-chip .count { font-size: 0.78rem; color: var(--ink-mute); }
.cat-chip .arrow { color: var(--accent); flex: none; }

/* ---------- product cards ---------- */

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.p-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.3s, transform 0.35s var(--ease-out), box-shadow 0.35s;
}
.p-card:hover {
  border-color: var(--accent-line);
  transform: translateY(-5px);
  box-shadow: 0 30px 60px -24px rgba(0, 0, 0, 0.7);
}

.p-tile {
  aspect-ratio: 4 / 3;
  background: radial-gradient(115% 105% at 50% 0%, var(--tile-hi) 0%, var(--tile-lo) 100%);
  display: grid;
  place-items: center;
  padding: 7%;
  overflow: hidden;
}
.p-tile img {
  width: 100%; height: 100%;
  object-fit: contain;
  mix-blend-mode: multiply;
  transition: transform 0.5s var(--ease-out);
}
.p-card:hover .p-tile img { transform: scale(1.05); }

.p-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px 26px 26px;
  flex: 1;
}
.p-cat { color: var(--accent); }
.p-title {
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 600;
  letter-spacing: 0.005em;
  line-height: 1.3;
}
.p-specs { display: flex; flex-direction: column; gap: 5px; }
.p-specs li {
  font-size: 0.8rem;
  color: var(--ink-mute);
  display: flex;
  gap: 9px;
  align-items: baseline;
}
.p-specs li::before {
  content: "";
  width: 4px; height: 4px;
  border-radius: 1px;
  background: var(--line-strong);
  flex: none;
  transform: translateY(-1px);
}
.p-cta {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

/* ---------- filter bar ---------- */

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-bottom: 44px;
}
.filter-btn {
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--ink-soft);
  transition: all 0.22s;
}
.filter-btn:hover { border-color: var(--line-strong); color: var(--ink); }
.filter-btn.active {
  background: var(--ink);
  border-color: var(--ink);
  color: #0a0b0d;
}
.filter-btn .n { color: inherit; opacity: 0.5; margin-left: 5px; }

.p-card.hidden { display: none; }

/* ---------- fiber flagship ---------- */

.fiber-section {
  position: relative;
  background:
    radial-gradient(50% 42% at 82% 22%, rgba(255, 90, 31, 0.08), transparent 70%),
    var(--bg);
  overflow: hidden;
}
.fiber-section::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(237, 237, 232, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(237, 237, 232, 0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(75% 70% at 70% 40%, #000 0%, transparent 80%);
  mask-image: radial-gradient(75% 70% at 70% 40%, #000 0%, transparent 80%);
  pointer-events: none;
}

.fiber-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(44px, 6vw, 80px);
  align-items: center;
}

.fiber-visual {
  border-radius: 26px;
  background: radial-gradient(120% 110% at 50% 0%, var(--tile-hi) 0%, var(--tile-lo) 100%);
  padding: 4%;
  box-shadow: 0 40px 90px -30px rgba(0, 0, 0, 0.8), inset 0 0 0 1px rgba(255, 255, 255, 0.5);
}
.fiber-visual img { aspect-ratio: 1; object-fit: contain; mix-blend-mode: multiply; }

.spec-chips { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 34px 0 38px; }
.spec-chip {
  padding: 17px 19px;
  background: rgba(237, 237, 232, 0.03);
  border: 1px solid var(--line);
  border-radius: 13px;
}
.spec-chip .v {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  line-height: 1.15;
}
.spec-chip .v span { color: var(--accent); }
.spec-chip .k { font-size: 0.76rem; color: var(--ink-mute); margin-top: 4px; letter-spacing: 0.03em; }

.fiber-points { display: flex; flex-direction: column; gap: 13px; margin-top: 8px; }
.fiber-points li {
  display: flex; gap: 12px; align-items: baseline;
  color: var(--ink-soft);
  font-size: 0.95rem;
}
.fiber-points li::before {
  content: "→";
  color: var(--accent);
  font-family: var(--font-display);
  flex: none;
}

/* ---------- feature cards (OEM/why/values) ---------- */

.card-grid { display: grid; gap: 16px; }
.card-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
.card-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }

.f-card {
  padding: 30px 28px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.25s, transform 0.3s var(--ease-out);
}
.f-card:hover { border-color: var(--accent-line); transform: translateY(-3px); }
.f-card .ico {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: 11px;
  background: var(--accent-soft);
  color: var(--accent);
  margin-bottom: 20px;
}
.f-card .ico svg { width: 21px; height: 21px; }
.f-card h3 { font-size: 1.06rem; margin-bottom: 10px; }
.f-card p { font-size: 0.88rem; color: var(--ink-mute); }

.f-card.accent { background: linear-gradient(160deg, rgba(255, 90, 31, 0.1), rgba(255, 90, 31, 0.02)), var(--bg-card); border-color: var(--accent-line); }

/* numbered step cards */
.n-card { position: relative; }
.n-card .n {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--accent);
  margin-bottom: 16px;
  display: block;
}

/* ---------- process timeline ---------- */

.timeline {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
  counter-reset: step;
}
.t-step {
  position: relative;
  padding: 24px 20px 26px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 15px;
  counter-increment: step;
}
.t-step::before {
  content: "0" counter(step);
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 1px var(--accent-line);
  display: block;
  line-height: 1;
  margin-bottom: 14px;
}
.t-step h3 { font-size: 0.95rem; margin-bottom: 7px; }
.t-step p { font-size: 0.78rem; color: var(--ink-mute); }

/* ---------- CTA band ---------- */

.cta-band {
  position: relative;
  border-block: 1px solid var(--line);
  background:
    radial-gradient(60% 130% at 50% 0%, rgba(255, 90, 31, 0.12), transparent 62%),
    var(--bg-raise);
  text-align: center;
  padding: clamp(84px, 10vw, 120px) 0;
}
.cta-band .h2 { margin: 20px 0 16px; }
.cta-band .lead { margin-inline: auto; }
.cta-band .hero-actions { justify-content: center; margin-top: 38px; }

/* ---------- contact / form ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(36px, 5vw, 64px);
  align-items: start;
}

.form-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: clamp(28px, 4vw, 44px);
}

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field.full { grid-column: 1 / -1; }
.field label {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.field label .req { color: var(--accent); }
.field input, .field select, .field textarea {
  width: 100%;
  padding: 14px 16px;
  background: rgba(10, 11, 13, 0.55);
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color 0.2s, background 0.2s;
}
.field textarea { min-height: 140px; resize: vertical; }
.field input::placeholder, .field textarea::placeholder { color: var(--ink-mute); }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(255, 90, 31, 0.04);
}
.field select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--ink-mute) 50%), linear-gradient(135deg, var(--ink-mute) 50%, transparent 50%); background-position: calc(100% - 21px) 50%, calc(100% - 16px) 50%; background-size: 5px 5px; background-repeat: no-repeat; }
.field select option { background: #14171c; color: var(--ink); }

.form-foot {
  display: flex; align-items: center; justify-content: space-between; gap: 18px;
  margin-top: 26px;
  flex-wrap: wrap;
}
.form-note { font-size: 0.78rem; color: var(--ink-mute); max-width: 34ch; }

.hp-field { position: absolute; left: -9999px; opacity: 0; height: 0; overflow: hidden; }

.form-status {
  margin-top: 20px;
  padding: 16px 18px;
  border-radius: 12px;
  font-size: 0.9rem;
  display: none;
}
.form-status.ok { display: block; background: rgba(72, 187, 120, 0.1); border: 1px solid rgba(72, 187, 120, 0.35); color: #7fdba8; }
.form-status.err { display: block; background: rgba(255, 90, 31, 0.08); border: 1px solid var(--accent-line); color: #ffa080; }

/* contact info side */
.info-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: clamp(26px, 3vw, 36px);
}
.info-card + .info-card { margin-top: 16px; }
.info-row {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}
.info-row:last-child { border-bottom: 0; }
.info-row .ico {
  width: 40px; height: 40px; flex: none;
  display: grid; place-items: center;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent);
}
.info-row .ico svg { width: 18px; height: 18px; }
.info-row .k { font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-mute); margin-bottom: 3px; font-family: var(--font-display); font-weight: 600; }
.info-row .v { font-size: 0.95rem; line-height: 1.5; }
.info-row a.v:hover { color: var(--accent); }

/* ---------- page hero (inner pages) ---------- */

.page-hero {
  padding: 176px 0 76px;
  position: relative;
  background:
    radial-gradient(50% 70% at 80% 0%, rgba(255, 90, 31, 0.06), transparent 70%),
    var(--bg);
  border-bottom: 1px solid var(--line);
}
.page-hero .eyebrow { margin-bottom: 20px; }
.page-hero .h1 { font-size: clamp(2.4rem, 5vw, 3.9rem); margin-bottom: 20px; }
.page-hero .lead { max-width: 64ch; }

.breadcrumb {
  display: flex; gap: 10px; align-items: center;
  font-size: 0.8rem; color: var(--ink-mute);
  margin-bottom: 26px;
  letter-spacing: 0.04em;
}
.breadcrumb a:hover { color: var(--ink); }
.breadcrumb .sep { color: var(--accent); }

/* ---------- about ---------- */

.story-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(40px, 6vw, 80px);
  align-items: start;
}
.story-copy p + p { margin-top: 18px; }
.story-copy p { color: var(--ink-soft); }
.story-copy .highlight {
  border-left: 2px solid var(--accent);
  padding: 4px 0 4px 22px;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 500;
  line-height: 1.45;
  color: var(--ink);
  margin: 30px 0;
}

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  background: #07080a;
  padding: 72px 0 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 44px;
  padding-bottom: 56px;
  border-bottom: 1px solid var(--line);
}
.footer-brand p { font-size: 0.86rem; color: var(--ink-mute); margin-top: 18px; max-width: 30ch; }
.footer-col .mono-tag { color: var(--ink-mute); display: block; margin-bottom: 20px; }
.footer-col ul { display: flex; flex-direction: column; gap: 11px; }
.footer-col a { font-size: 0.9rem; color: var(--ink-soft); transition: color 0.2s; }
.footer-col a:hover { color: var(--accent); }
.footer-col address { font-style: normal; font-size: 0.9rem; color: var(--ink-soft); line-height: 1.8; }
.footer-col address a:hover { color: var(--accent); }

.footer-bottom {
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  padding-top: 32px;
  font-size: 0.78rem;
  color: var(--ink-mute);
  flex-wrap: wrap;
}
.footer-bottom .dot { color: var(--accent); }

/* ---------- reveal animations ---------- */

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
  transition-delay: var(--d, 0s);
  will-change: opacity, transform;
}
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

/* ---------- 404 ---------- */

.nf { text-align: center; padding: 240px 0 160px; }
.nf .code {
  font-family: var(--font-display);
  font-size: clamp(5rem, 14vw, 9rem);
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--accent-line);
  line-height: 1;
}
.nf .h2 { margin: 18px 0 12px; }
.nf .lead { margin: 0 auto 36px; }

/* ---------- responsive ---------- */

@media (max-width: 1060px) {
  .hero-grid { grid-template-columns: 1fr; gap: 54px; }
  .hero-visual { max-width: 560px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat { padding: 30px 26px; }
  .stat:nth-child(odd) { border-left: 0; padding-left: 0; }
  .stat:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .card-grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
  .card-grid.cols-3 { grid-template-columns: repeat(2, 1fr); }
  .timeline { grid-template-columns: repeat(3, 1fr); }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .cat-strip { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .story-grid, .fiber-grid, .contact-grid { grid-template-columns: 1fr; }
  .fiber-visual { max-width: 540px; }
}

@media (max-width: 720px) {
  .main-nav, .header-cta { display: none; }
  .nav-toggle { display: grid; }
  .site-header.nav-open {
    background: rgba(10, 11, 13, 0.96);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-bottom-color: var(--line);
  }
  .site-header.nav-open .main-nav {
    display: flex;
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 18px 24px 26px;
  }
  .site-header.nav-open .main-nav a { padding: 13px 16px; font-size: 1rem; }
  .site-header.nav-open .header-cta { display: block; position: absolute; top: 100%; left: 0; right: 0; padding: 0 24px 26px; }
  .site-header.nav-open .header-cta .btn { width: 100%; }

  .hero { padding: 128px 0 60px; }
  .hero-actions .btn { flex: 1; }
  .product-grid, .card-grid.cols-3, .card-grid.cols-2 { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: 1fr 1fr; }
  .spec-chips { grid-template-columns: 1fr 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .hero-card .tag-1 { left: -2%; }
  .hero-card .tag-2 { right: -2%; }
  .section-head.row { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .card-grid.cols-4 { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: 1fr; }
  .cat-strip { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .stat { border-left: 0; padding: 22px 0; border-bottom: 1px solid var(--line); }
  .stat:last-child { border-bottom: 0; }
  .footer-grid { grid-template-columns: 1fr; }
}