/* AutoBridge Parts — industrial spec-sheet design system */
:root {
  --ink: #101418;
  --ink-2: #1a1f26;
  --paper: #f4f5f7;
  --white: #ffffff;
  --accent: #ff5a1f;
  --accent-dark: #e0430e;
  --steel: #6b7480;
  --line: #e3e5e8;
  --line-dark: #2a3038;
  --font: "Inter", "Archivo", -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", "SF Mono", Consolas, "Courier New", monospace;
  --max: 1200px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--white);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* ---------- typography helpers ---------- */
.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}
.eyebrow .num { color: var(--steel); margin-right: 10px; }
.h1 { font-size: clamp(40px, 6vw, 64px); font-weight: 800; line-height: 1.05; letter-spacing: -0.02em; }
.h2 { font-size: clamp(28px, 4vw, 40px); font-weight: 800; line-height: 1.15; letter-spacing: -0.01em; }
.h3 { font-size: 20px; font-weight: 700; line-height: 1.3; }
.lead { font-size: 18px; color: var(--steel); max-width: 640px; }
.mono { font-family: var(--mono); }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(16, 20, 24, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line-dark);
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.logo { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 800; font-size: 18px; letter-spacing: -0.01em; }
.logo-mark {
  width: 30px; height: 30px; border: 2px solid var(--accent);
  display: grid; place-items: center;
  font-family: var(--mono); font-size: 13px; font-weight: 700; color: var(--accent);
}
.logo .sub { color: var(--steel); font-weight: 500; font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase; }
.nav { display: flex; gap: 32px; align-items: center; }
.nav a { color: #c7ccd3; font-size: 14px; font-weight: 600; letter-spacing: 0.02em; transition: color .15s; }
.nav a:hover, .nav a.active { color: #fff; }
.nav .btn-nav { color: #fff; }
.btn {
  display: inline-block;
  background: var(--accent); color: #fff;
  font-size: 14px; font-weight: 700; letter-spacing: 0.04em;
  padding: 12px 22px; border: none; cursor: pointer;
  transition: background .15s;
}
.btn:hover { background: var(--accent-dark); }
.btn-ghost {
  background: transparent; color: #fff;
  border: 1px solid var(--line-dark);
}
.btn-ghost:hover { background: var(--ink-2); border-color: var(--steel); }
.menu-toggle { display: none; background: none; border: none; color: #fff; font-size: 22px; cursor: pointer; }

/* ---------- hero ---------- */
.hero {
  background: var(--ink);
  color: #fff;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line-dark);
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background:
    linear-gradient(90deg, rgba(255,90,31,.06) 1px, transparent 1px) 0 0 / 72px 72px,
    linear-gradient(rgba(255,90,31,.06) 1px, transparent 1px) 0 0 / 72px 72px;
  mask-image: radial-gradient(ellipse at 70% 40%, #000 0%, transparent 70%);
  pointer-events: none;
}
.hero .container {
  position: relative;
  padding: 96px 24px 0;
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 56px;
  align-items: end;
}
.hero-copy .h1 { margin: 18px 0 20px; }
.hero-copy .h1 em { font-style: normal; color: var(--accent); }
.hero-copy .lead { color: #9aa3ad; margin-bottom: 32px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 56px; }

/* OE search widget */
.oe-search {
  background: var(--ink-2);
  border: 1px solid var(--line-dark);
  padding: 22px;
}
.oe-search label {
  display: block;
  font-family: var(--mono); font-size: 11px; letter-spacing: .12em;
  text-transform: uppercase; color: var(--steel); margin-bottom: 10px;
}
.oe-row { display: flex; gap: 10px; }
.oe-row input {
  flex: 1;
  background: var(--ink);
  border: 1px solid var(--line-dark);
  color: #fff;
  font-family: var(--mono); font-size: 14px;
  padding: 14px 16px;
  outline: none;
}
.oe-row input::placeholder { color: #4d5560; }
.oe-row input:focus { border-color: var(--accent); }
.oe-row .btn { padding: 14px 24px; }
.oe-hint { margin-top: 12px; font-size: 12px; color: var(--steel); font-family: var(--mono); }
.oe-hint span { color: #c7ccd3; }

/* hero image slot */
.hero-visual { position: relative; }
.img-slot {
  background:
    repeating-linear-gradient(45deg, #1a1f26 0 14px, #171b21 14px 28px);
  border: 1px dashed #3a424c;
  display: grid; place-items: center;
  color: #57606b;
  font-family: var(--mono); font-size: 12px; letter-spacing: .08em;
  text-transform: uppercase;
  text-align: center;
  min-height: 320px;
  padding: 24px;
}
.img-slot.light {
  background: repeating-linear-gradient(45deg, #eceef1 0 14px, #e6e8ec 14px 28px);
  border-color: #c9ced6;
  color: #8b93a0;
}
.img-slot .slot-tag {
  display: inline-block;
  border: 1px solid currentColor;
  padding: 6px 12px;
  margin-top: 8px;
  font-size: 10px;
}
.hero-badge {
  position: absolute; left: -14px; bottom: 26px;
  background: var(--accent); color: #fff;
  font-family: var(--mono); font-size: 11px; font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase;
  padding: 10px 14px;
}

/* ---------- stat band ---------- */
.stats {
  background: var(--ink-2);
  border-bottom: 1px solid var(--line-dark);
}
.stats .container {
  display: grid; grid-template-columns: repeat(4, 1fr);
}
.stat {
  padding: 30px 24px;
  border-left: 1px solid var(--line-dark);
  color: #fff;
}
.stat:first-child { border-left: none; }
.stat b {
  display: block;
  font-size: 34px; font-weight: 800; letter-spacing: -0.02em;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.stat span { font-size: 13px; color: #9aa3ad; }

/* ---------- sections ---------- */
.section { padding: 88px 0; }
.section.alt { background: var(--paper); }
.section-head { margin-bottom: 44px; }
.section-head .h2 { margin-top: 14px; }

/* category grid */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.cat-card {
  background: #fff;
  border: 1px solid var(--line);
  display: flex; flex-direction: column;
  transition: border-color .15s, transform .15s;
}
.cat-card:hover { border-color: var(--accent); transform: translateY(-3px); }
.cat-card .img-slot { min-height: 190px; border: none; border-bottom: 1px solid var(--line); }
.cat-body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.cat-code {
  font-family: var(--mono); font-size: 11px; font-weight: 600;
  letter-spacing: .1em; color: var(--accent); margin-bottom: 8px;
}
.cat-body .h3 { margin-bottom: 8px; }
.cat-body p { font-size: 14px; color: var(--steel); flex: 1; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 16px; }
.tag {
  font-family: var(--mono); font-size: 10px; letter-spacing: .06em;
  background: var(--paper); border: 1px solid var(--line);
  color: var(--steel); padding: 4px 8px;
}
.cat-more {
  margin-top: 16px;
  font-size: 13px; font-weight: 700; color: var(--ink);
  font-family: var(--mono); letter-spacing: .04em;
}
.cat-card:hover .cat-more { color: var(--accent); }

/* ---------- why / advantages ---------- */
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.why-item {
  border-top: 3px solid var(--ink);
  padding-top: 20px;
}
.why-item .num {
  font-family: var(--mono); font-size: 12px; color: var(--accent);
  font-weight: 700; letter-spacing: .1em;
}
.why-item .h3 { margin: 10px 0 8px; font-size: 17px; }
.why-item p { font-size: 14px; color: var(--steel); }

/* ---------- process ---------- */
.process { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border: 1px solid var(--line); background: #fff; }
.step { padding: 30px 26px; border-left: 1px solid var(--line); }
.step:first-child { border-left: none; }
.step .num {
  font-size: 44px; font-weight: 800; color: var(--line);
  line-height: 1; font-variant-numeric: tabular-nums;
}
.step .h3 { font-size: 16px; margin: 14px 0 8px; }
.step p { font-size: 13.5px; color: var(--steel); }

/* ---------- CTA band ---------- */
.cta-band {
  background: var(--accent);
  color: #fff;
  padding: 64px 0;
}
.cta-band .container {
  display: flex; align-items: center; justify-content: space-between; gap: 32px;
  flex-wrap: wrap;
}
.cta-band .h2 { color: #fff; }
.cta-band p { opacity: .92; margin-top: 8px; }
.cta-band .btn { background: var(--ink); }
.cta-band .btn:hover { background: #000; }

/* ---------- footer ---------- */
.site-footer {
  background: var(--ink); color: #9aa3ad;
  padding: 56px 0 28px;
  border-top: 1px solid var(--line-dark);
}
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; margin-bottom: 40px; }
.footer-grid h4 {
  color: #fff; font-size: 12px; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase;
  font-family: var(--mono);
  margin-bottom: 16px;
}
.footer-grid a, .footer-grid li { font-size: 14px; line-height: 2; color: #9aa3ad; }
.footer-grid a:hover { color: var(--accent); }
.footer-about { font-size: 14px; line-height: 1.7; max-width: 300px; margin-top: 14px; }
.footer-bottom {
  border-top: 1px solid var(--line-dark);
  padding-top: 22px;
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-size: 12.5px; font-family: var(--mono); color: #57606b;
}

/* ---------- page hero (inner pages) ---------- */
.page-hero {
  background: var(--ink); color: #fff;
  padding: 72px 0 64px;
  border-bottom: 1px solid var(--line-dark);
  position: relative; overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute; inset: 0;
  background:
    linear-gradient(90deg, rgba(255,90,31,.05) 1px, transparent 1px) 0 0 / 72px 72px,
    linear-gradient(rgba(255,90,31,.05) 1px, transparent 1px) 0 0 / 72px 72px;
  pointer-events: none;
}
.page-hero .container { position: relative; }
.page-hero .h1 { font-size: clamp(34px, 5vw, 52px); margin-top: 16px; }
.page-hero .lead { color: #9aa3ad; margin-top: 16px; }

/* ---------- product listing ---------- */
.filter-bar {
  display: flex; gap: 10px; flex-wrap: wrap;
  margin-bottom: 32px;
}
.filter-bar button {
  font-family: var(--mono); font-size: 12px; font-weight: 600;
  letter-spacing: .06em; text-transform: uppercase;
  background: #fff; border: 1px solid var(--line); color: var(--steel);
  padding: 10px 16px; cursor: pointer; transition: all .15s;
}
.filter-bar button:hover { border-color: var(--ink); color: var(--ink); }
.filter-bar button.active { background: var(--ink); border-color: var(--ink); color: #fff; }

.prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.prod-card {
  background: #fff; border: 1px solid var(--line);
  display: flex; flex-direction: column;
}
.prod-card .img-slot { min-height: 210px; border: none; border-bottom: 1px solid var(--line); }
.prod-body { padding: 20px 22px 24px; }
.prod-body .cat-code { margin-bottom: 6px; }
.prod-body .h3 { font-size: 17px; margin-bottom: 10px; }
.spec-table { width: 100%; border-collapse: collapse; margin-top: 14px; }
.spec-table td {
  font-size: 12.5px; padding: 7px 0;
  border-top: 1px dashed var(--line);
}
.spec-table td:first-child {
  font-family: var(--mono); color: var(--steel);
  text-transform: uppercase; letter-spacing: .06em; font-size: 11px;
  width: 42%;
}
.spec-table td:last-child { text-align: right; font-weight: 600; }

/* ---------- about page ---------- */
.about-split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.about-split .img-slot { min-height: 360px; }
.about-list { margin-top: 26px; }
.about-list li {
  display: flex; gap: 14px; padding: 14px 0;
  border-top: 1px solid var(--line);
  font-size: 15px;
}
.about-list li::before {
  content: "→"; color: var(--accent); font-weight: 700;
  font-family: var(--mono);
}
.cert-row { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 24px; }
.cert {
  border: 1px solid var(--line); background: #fff;
  font-family: var(--mono); font-size: 12px; font-weight: 700;
  letter-spacing: .08em; color: var(--ink);
  padding: 12px 18px;
}

/* ---------- contact / RFQ ---------- */
.contact-split { display: grid; grid-template-columns: 1.3fr 1fr; gap: 48px; align-items: start; }
.rfq-form {
  background: #fff; border: 1px solid var(--line);
  padding: 36px;
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-field { display: flex; flex-direction: column; gap: 7px; }
.form-field.full { grid-column: 1 / -1; }
.form-field label {
  font-family: var(--mono); font-size: 11px; font-weight: 600;
  letter-spacing: .1em; text-transform: uppercase; color: var(--steel);
}
.form-field label .req { color: var(--accent); }
.form-field input, .form-field select, .form-field textarea {
  border: 1px solid var(--line);
  background: var(--paper);
  padding: 13px 14px;
  font-family: var(--font); font-size: 15px;
  color: var(--ink); outline: none;
  transition: border-color .15s, background .15s;
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
  border-color: var(--accent); background: #fff;
}
.form-field textarea { resize: vertical; min-height: 130px; }
.form-note { font-size: 13px; color: var(--steel); margin-top: 16px; }
.rfq-form .btn { margin-top: 22px; width: 100%; padding: 16px; font-size: 15px; }
.form-success {
  display: none;
  background: #ecfdf3; border: 1px solid #abefc6; color: #067647;
  padding: 14px 16px; font-size: 14px; margin-top: 18px;
}
.form-success.show { display: block; }
.hidden-field { display: none; }

.contact-aside .info-card {
  border: 1px solid var(--line); background: #fff;
  padding: 24px; margin-bottom: 16px;
}
.info-card h4 {
  font-family: var(--mono); font-size: 11px; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase; color: var(--accent);
  margin-bottom: 10px;
}
.info-card p { font-size: 14.5px; color: var(--ink); line-height: 1.7; }
.info-card .dim { color: var(--steel); }

/* ---------- responsive ---------- */
@media (max-width: 960px) {
  .hero .container { grid-template-columns: 1fr; padding-top: 64px; }
  .stats .container { grid-template-columns: repeat(2, 1fr); }
  .stat { border-left: none; border-top: 1px solid var(--line-dark); }
  .stat:nth-child(-n+2) { border-top: none; }
  .cat-grid, .prod-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .process { grid-template-columns: repeat(2, 1fr); }
  .step { border-top: 1px solid var(--line); }
  .step:nth-child(-n+2) { border-top: none; }
  .step:nth-child(odd) { border-left: none; }
  .about-split, .contact-split { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .nav {
    display: none;
    position: absolute; top: 68px; left: 0; right: 0;
    background: var(--ink);
    flex-direction: column; align-items: flex-start;
    padding: 20px 24px 28px; gap: 18px;
    border-bottom: 1px solid var(--line-dark);
  }
  .nav.open { display: flex; }
  .menu-toggle { display: block; }
  .cat-grid, .prod-grid, .why-grid, .process, .form-grid { grid-template-columns: 1fr; }
  .step { border-left: none; border-top: 1px solid var(--line); }
  .step:first-child { border-top: none; }
  .stats .container { grid-template-columns: 1fr; }
  .stat:nth-child(-n+2) { border-top: 1px solid var(--line-dark); }
  .stat:first-child { border-top: none; }
  .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
}