/* =========================================================
   SZ Procure — Electronics & AI Hardware Sourcing
   B2B design system: deep navy + technology blue
   ========================================================= */

:root {
  --navy: #0b1b33;
  --navy-2: #0f2547;
  --ink: #0f172a;
  --bg: #ffffff;
  --bg-soft: #f6f8fb;
  --bg-soft-2: #eef2f7;
  --border: #e3e8ef;
  --border-strong: #cdd5e0;
  --muted: #5b6b80;
  --muted-2: #8a97a8;
  --accent: #2563eb;      /* technology blue */
  --accent-600: #1d4ed8;
  --accent-soft: #e8f0ff;
  --ok: #15a07a;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 2px rgba(15,23,42,.06), 0 1px 3px rgba(15,23,42,.04);
  --shadow-md: 0 6px 24px rgba(15,23,42,.08);
  --shadow-lg: 0 18px 48px rgba(15,23,42,.12);
  --container: 1180px;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

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

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 { color: var(--navy); line-height: 1.2; font-weight: 700; letter-spacing: -.01em; margin: 0 0 .5em; }
h1 { font-size: clamp(2rem, 4.4vw, 3.25rem); letter-spacing: -.02em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.25rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1rem; color: #334155; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-600); }
img, svg { max-width: 100%; display: block; }
ul { margin: 0; padding: 0; list-style: none; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 84px 0; }
.section.soft { background: var(--bg-soft); }
.section.navy { background: var(--navy); color: #dbe4f0; }
.section.navy h2, .section.navy h3 { color: #fff; }
.section.navy p { color: #b7c4d6; }
.eyebrow { text-transform: uppercase; letter-spacing: .12em; font-size: .8rem; font-weight: 600; color: var(--accent); margin-bottom: 12px; }
.lead { font-size: 1.12rem; color: #475569; max-width: 64ch; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font); font-weight: 600; font-size: .98rem;
  padding: 13px 22px; border-radius: 10px; cursor: pointer; border: 1px solid transparent;
  transition: transform .12s ease, background .15s ease, box-shadow .15s ease, color .15s ease;
  white-space: nowrap; line-height: 1;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 1px 2px rgba(37,99,235,.4); }
.btn-primary:hover { background: var(--accent-600); color: #fff; box-shadow: 0 6px 18px rgba(37,99,235,.35); }
.btn-navy { background: var(--navy); color: #fff; }
.btn-navy:hover { background: var(--navy-2); color: #fff; }
.btn-ghost { background: transparent; color: var(--navy); border-color: var(--border-strong); }
.btn-ghost:hover { border-color: var(--navy); background: #f3f6fb; }
.btn-white { background: #fff; color: var(--navy); }
.btn-white:hover { background: #eef2f7; }
.btn-lg { padding: 16px 28px; font-size: 1.05rem; }
.btn-block { width: 100%; }
.arrow { font-weight: 700; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.92);
  backdrop-filter: saturate(160%) blur(10px); border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; color: var(--navy); font-size: 1.18rem; letter-spacing: -.02em; }
.brand .logo-mark { width: 30px; height: 30px; flex: none; }
.brand small { display: block; font-size: .66rem; font-weight: 600; letter-spacing: .14em; color: var(--muted-2); text-transform: uppercase; }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { color: #334155; font-weight: 500; font-size: .96rem; }
.nav-links a:hover { color: var(--navy); }
.nav-cta { display: flex; align-items: center; gap: 14px; }
.lang-switch { display: flex; align-items: center; gap: 3px; font-size: .85rem; }
.lang-btn { background: none; border: none; cursor: pointer; color: inherit; font-weight: 600; padding: 4px 6px; border-radius: 6px; opacity: .55; }
.lang-btn:hover { opacity: 1; }
.lang-btn.active { opacity: 1; color: var(--accent); background: rgba(37,99,235,.14); }
.lang-sep { opacity: .4; }
.mobile-menu .lang-switch { margin: 8px 18px 4px; padding-bottom: 10px; border-bottom: 1px solid var(--border); }
.nav-toggle { display: none; background: none; border: 1px solid var(--border-strong); border-radius: 9px; width: 42px; height: 42px; cursor: pointer; }
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--navy); margin: 3px auto; border-radius: 2px; }

.mobile-menu { display: none; flex-direction: column; padding: 8px 24px 20px; border-bottom: 1px solid var(--border); background: #fff; }
.mobile-menu.open { display: flex; }
.mobile-menu a { padding: 12px 0; color: #334155; font-weight: 500; border-bottom: 1px solid var(--bg-soft); }
.mobile-menu .btn { margin-top: 14px; }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; background: linear-gradient(180deg, #f8fafc 0%, #eef2f9 100%); }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; padding: 72px 0 80px; }
.hero h1 { max-width: 16ch; }
.hero .lead { margin-top: 8px; }
.hero-actions { display: flex; gap: 14px; margin-top: 28px; flex-wrap: wrap; }
.hero-visual { position: relative; border-radius: 18px; overflow: hidden; box-shadow: var(--shadow-lg); border: 1px solid var(--border); background: var(--navy); }
.hero-visual svg { width: 100%; height: auto; display: block; }
.trust-bar { display: flex; gap: 26px; flex-wrap: wrap; margin-top: 30px; color: var(--muted); font-size: .9rem; }
.trust-bar b { color: var(--navy); font-weight: 700; }

/* ---------- Cards / Grid ---------- */
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow-sm); transition: box-shadow .2s ease, transform .2s ease, border-color .2s ease;
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); border-color: var(--border-strong); }
.card h3 { margin-bottom: 8px; }
.card p { color: var(--muted); margin-bottom: 16px; }
.card .icon { width: 46px; height: 46px; border-radius: 12px; background: var(--accent-soft); color: var(--accent); display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.card .icon svg { width: 24px; height: 24px; }
.link-cta { font-weight: 600; color: var(--accent); display: inline-flex; align-items: center; gap: 6px; }

.section-head { max-width: 68ch; margin-bottom: 44px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

/* ---------- Category chips ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin: 14px 0 0; }
.chip { font-size: .85rem; font-weight: 500; color: #475569; background: var(--bg-soft-2); border: 1px solid var(--border); padding: 7px 13px; border-radius: 999px; }

/* ---------- Search block ---------- */
.search-block { background: var(--navy); color: #fff; border-radius: 18px; padding: 44px; }
.search-block h2 { color: #fff; }
.search-block p { color: #b7c4d6; }
.search-row { display: flex; gap: 12px; margin-top: 22px; }
.search-input { flex: 1; padding: 15px 18px; border-radius: 10px; border: 1px solid #2a3f5f; background: #0d1f3a; color: #fff; font-size: 1rem; font-family: var(--font); }
.search-input::placeholder { color: #7f93b0; }
.search-input:focus { outline: none; border-color: var(--accent); }

/* ---------- Product / category cards ---------- */
.cat-card { display: flex; flex-direction: column; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: #fff; box-shadow: var(--shadow-sm); transition: box-shadow .2s, transform .2s; }
.cat-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.cat-thumb { aspect-ratio: 16/10; background: linear-gradient(135deg, #0f2547, #1d4ed8); display: flex; align-items: center; justify-content: center; color: #fff; position: relative; }
.cat-thumb .ph-label { position: absolute; bottom: 10px; left: 12px; font-size: .68rem; letter-spacing: .08em; text-transform: uppercase; color: #aebfda; background: rgba(0,0,0,.25); padding: 3px 8px; border-radius: 6px; }
.cat-thumb svg { width: 56px; height: 56px; opacity: .92; }
.cat-body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.cat-body p { color: var(--muted); font-size: .94rem; flex: 1; }

/* ---------- How it works steps ---------- */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; counter-reset: step; }
.step { position: relative; padding: 26px 20px; border: 1px solid var(--border); border-radius: var(--radius); background: #fff; }
.step .num { font-size: 1.6rem; font-weight: 800; color: var(--accent-soft); -webkit-text-stroke: 1px var(--accent); letter-spacing: .02em; }
.step h3 { font-size: 1.05rem; margin: 10px 0 6px; }
.step p { font-size: .9rem; color: var(--muted); margin: 0; }

/* ---------- CTA bands ---------- */
.cta-band { background: var(--navy); color: #fff; border-radius: 20px; padding: 56px; display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.cta-band h2 { color: #fff; margin: 0; }
.cta-band p { color: #b7c4d6; margin: 6px 0 0; max-width: 52ch; }
.cta-band.navy-soft { background: linear-gradient(135deg, #0f2547, #14306a); }

/* ---------- Forms ---------- */
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field.full { grid-column: 1 / -1; }
.field label { font-weight: 600; font-size: .9rem; color: var(--ink); }
.field label .req { color: var(--accent); }
.field input, .field select, .field textarea {
  font-family: var(--font); font-size: .98rem; padding: 12px 14px; border: 1px solid var(--border-strong);
  border-radius: 10px; background: #fff; color: var(--ink); transition: border-color .15s, box-shadow .15s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft);
}
.field textarea { min-height: 120px; resize: vertical; }
.field .hint { font-size: .8rem; color: var(--muted-2); }

.upload-box { border: 1.5px dashed var(--border-strong); border-radius: 12px; padding: 26px; text-align: center; background: var(--bg-soft); transition: border-color .15s, background .15s; }
.upload-box.drag { border-color: var(--accent); background: var(--accent-soft); }
.upload-box input[type=file] { display: none; }
.upload-hint { color: var(--muted); font-size: .88rem; margin-top: 8px; }
.file-list { margin-top: 12px; font-size: .88rem; color: var(--ink); }
.file-list div { padding: 6px 0; border-top: 1px dashed var(--border); }

.form-note { font-size: .82rem; color: var(--muted-2); margin-top: 6px; }
.form-success { display: none; background: #ecfdf5; border: 1px solid #a7f3d0; color: #065f46; border-radius: 14px; padding: 28px; text-align: center; }
.form-success.show { display: block; }
.form-success h3 { color: #065f46; }
.form-error { display: none; color: #b91c1c; font-size: .85rem; margin-top: 4px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--navy); color: #c2cde0; padding: 56px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 36px; }
.site-footer .brand { color: #fff; }
.site-footer .brand small { color: #8597b5; }
.site-footer h4 { color: #fff; font-size: .95rem; margin-bottom: 14px; }
.site-footer a { color: #c2cde0; display: block; padding: 5px 0; font-size: .92rem; }
.site-footer a:hover { color: #fff; }
.footer-contact p { margin: 4px 0; font-size: .92rem; color: #c2cde0; }
.footer-bottom { border-top: 1px solid #1d3354; margin-top: 40px; padding-top: 20px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: .85rem; color: #8a9bb8; }

/* ---------- Breadcrumb / page header ---------- */
.page-head { background: linear-gradient(180deg, #f8fafc, #eef2f9); padding: 56px 0 44px; border-bottom: 1px solid var(--border); }
.page-head h1 { margin-bottom: 8px; }
.page-head .lead { margin: 0; }

/* ---------- Placeholder photo ---------- */
.ph-photo { border-radius: 14px; overflow: hidden; border: 1px solid var(--border); background: linear-gradient(135deg,#0f2547,#1d4ed8); aspect-ratio: 4/3; display:flex; align-items:center; justify-content:center; color:#cdd9ee; position:relative; }
.ph-photo span { position:absolute; bottom:10px; left:10px; font-size:.7rem; letter-spacing:.06em; text-transform:uppercase; background:rgba(0,0,0,.3); padding:4px 9px; border-radius:6px; }

/* ---------- table ---------- */
.tbl { width: 100%; border-collapse: collapse; font-size: .92rem; margin-top: 10px; }
.tbl th, .tbl td { text-align: left; padding: 13px 14px; border-bottom: 1px solid var(--border); }
.tbl th { color: var(--muted); font-weight: 600; font-size: .82rem; text-transform: uppercase; letter-spacing: .04em; }
.tbl tr:hover td { background: var(--bg-soft); }

/* ---------- responsive ---------- */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .nav-links, .nav-cta .btn-ghost { display: none; }
  .nav-toggle { display: block; }
  .section { padding: 60px 0; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .search-row { flex-direction: column; }
  .cta-band, .search-block { padding: 34px 24px; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-grid { padding: 48px 0 56px; }
}

/* ============ PART PAGES (data-driven, /part/{slug}/) ============ */
.part-aside { position: sticky; top: 24px; align-self: start; }
.part-aside .card {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
}
.part-aside .card h3 { margin: 18px 0 10px; font-size: 1rem; }
.part-aside .card h3:first-child { margin-top: 0; }
.spec-list { list-style: none; padding: 0; margin: 6px 0 0; display: flex; flex-wrap: wrap; gap: 8px; }
.spec-list li {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 12px;
  font-size: .9rem;
  font-weight: 500;
}
.bullet-list { padding-left: 18px; margin: 6px 0 0; color: var(--text); }
.bullet-list li { margin: 5px 0; }
.alt-list { list-style: none; padding: 0; margin: 6px 0 0; }
.alt-list li {
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
}
.alt-list li:last-child { border-bottom: none; }
.alt-link { color: var(--accent); text-decoration: none; }
.alt-link:hover { text-decoration: underline; }
.status-row { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin-top: 14px; }
.status {
  display: inline-block;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: .82rem;
  font-weight: 600;
}
.status.scarce { background: #fff4e5; color: #b45309; border: 1px solid #fcd9a8; }
.status.eol { background: #fdeaea; color: #b42318; border: 1px solid #f6c5c0; }
.status.active { background: #e7f6ec; color: #1c7c3c; border: 1px solid #b6e3c4; }
.region { color: var(--muted); font-size: .88rem; }
.region .tag, .tag {
  display: inline-block;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 9px;
  margin: 0 4px 4px 0;
  font-size: .8rem;
  color: var(--muted);
}
.callout {
  border-radius: 14px;
  padding: 26px 28px;
  margin-top: 30px;
  border: 1px solid var(--border);
}
.callout.scarce { background: #fffaf2; border-color: #fcd9a8; }
.callout.eol { background: #fdf4f4; border-color: #f6c5c0; }
.callout h2 { margin: 0 0 10px; font-size: 1.25rem; }
.callout p { margin: 0; color: var(--text); line-height: 1.6; }
.cta-band {
  background: linear-gradient(135deg, #0b1b33 0%, #102a52 100%);
  border-radius: 18px;
  padding: 46px 40px;
  text-align: center;
  margin: 40px auto 0;
  max-width: 920px;
  color: #fff;
}
.cta-band h2 { color: #fff; margin: 0 0 12px; }
.cta-band p { color: #c8d6ef; margin: 0 0 22px; max-width: 56ch; margin-inline: auto; }

/* responsive for part pages */
@media (max-width: 1024px) {
  .two-col { grid-template-columns: 1fr; }
  .part-aside { position: static; margin-top: 26px; }
}

/* breadcrumb nav (generated pages) */
.breadcrumb {
  background: var(--bg-soft, #f5f7fa);
  border-bottom: 1px solid var(--border, #e6e9ef);
  font-size: 13px;
  padding: 10px 0;
}
.breadcrumb .container { color: var(--muted, #6b7280); }
.breadcrumb a { color: var(--accent, #2563eb); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span { color: var(--text, #1a2233); font-weight: 600; }

/* part / manufacturer / category index lists */
ul.part-index { columns: 2; column-gap: 32px; }
ul.part-index li {
  break-inside: avoid;
  padding: 6px 0;
  border-bottom: 1px solid var(--border, #e6e9ef);
}
.muted { color: var(--muted, #6b7280); font-size: 13px; }

/* ---- part page figure (original SVG artwork) ---- */
.part-figure {
  margin: 0 0 22px 0;
  border: 1px solid var(--border, #e6e9ef);
  border-radius: 14px;
  background: #fbfcfd;
  padding: 14px;
  text-align: center;
}
.part-figure img {
  width: 100%;
  max-width: 320px;
  height: auto;
  display: inline-block;
}
.part-figure figcaption {
  margin-top: 8px;
  font-size: 12px;
  color: var(--muted, #6b7280);
}
.source-link { margin-top: 12px; }
.source-link a {
  display: inline-block;
  font-weight: 600;
  color: var(--accent, #2563eb);
  text-decoration: none;
  border: 1px solid var(--border, #e6e9ef);
  border-radius: 8px;
  padding: 6px 10px;
}
.source-link a:hover { background: #f3f6fb; }
.small { font-size: 11px; }

/* ---- global nav search ---- */
.nav-search {
  display: flex;
  align-items: center;
  margin-left: 8px;
}
.nav-search input {
  width: 180px;
  max-width: 40vw;
  padding: 8px 12px;
  border: 1px solid var(--border, #e6e9ef);
  border-radius: 999px;
  font-size: 13px;
  outline: none;
  background: #fff;
  color: var(--text, #1a2233);
}
.nav-search input:focus {
  border-color: var(--accent, #2563eb);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}
.nav-search.mobile {
  margin: 10px 0;
  width: 100%;
}
.nav-search.mobile input {
  width: 100%;
  max-width: 100%;
}
/* hide desktop search on small screens (shown inside mobile menu) */
@media (max-width: 860px) {
  .nav-search:not(.mobile) { display: none; }
}
@media (min-width: 861px) {
  .nav-search.mobile { display: none; }
}

/* ---- search results badges ---- */
.tag.part { background: #eaf3ff; color: #0a84ff; }
.tag.mfr  { background: #eafaf0; color: #1c7c3c; }
.tag.cat  { background: #f6effe; color: #6f2dbd; }
.tag {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .03em;
  padding: 2px 7px;
  border-radius: 6px;
  text-transform: uppercase;
  margin-right: 6px;
}
.search-bar {
  display: flex;
  gap: 10px;
  margin: 18px 0 8px;
  max-width: 560px;
}
.search-bar input {
  flex: 1;
  padding: 13px 16px;
  border: 1px solid var(--border, #e6e9ef);
  border-radius: 12px;
  font-size: 15px;
  outline: none;
}
.search-bar input:focus {
  border-color: var(--accent, #2563eb);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}