/* ============================================================
   AdvPLM Solutions — Siemens Teamcenter Services
   Design tokens: blueprint / technical-drawing system
   ============================================================ */

:root {
  /* Color */
  --paper:        #F2F4F3;   /* drafting paper */
  --paper-alt:    #E7EBE9;   /* panel fill */
  --ink:          #14212E;   /* primary text / linework */
  --ink-soft:     #4B5A66;   /* secondary text */
  --line-blue:    #2454A8;   /* blueprint line blue (accent / links) */
  --line-blue-dk: #173B7C;
  --copper:       #B5551E;   /* stamped-seal accent, used sparingly */
  --paper-white:  #FCFDFC;
  --hairline:     rgba(20, 33, 46, 0.16);
  --hairline-strong: rgba(20, 33, 46, 0.32);

  /* Type */
  --font-sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;

  --step: 1.125;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-md: 1.25rem;
  --text-lg: 1.75rem;
  --text-xl: 2.5rem;
  --text-2xl: 3.4rem;

  --content-max: 1180px;
  --gutter: 24px;
}

@media (prefers-reduced-motion: no-preference) {
  :root { --transition-fast: 160ms ease; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--line-blue); text-decoration: none; }
a:hover { color: var(--line-blue-dk); }
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--line-blue);
  outline-offset: 3px;
}

.wrap {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

h1, h2, h3, h4 {
  font-family: var(--font-sans);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 0.5em;
  color: var(--ink);
  letter-spacing: -0.01em;
}
h1 { font-size: clamp(2.1rem, 4.4vw, var(--text-2xl)); font-weight: 650; }
h2 { font-size: clamp(1.6rem, 3vw, var(--text-xl)); }
h3 { font-size: var(--text-md); }
p { margin: 0 0 1em; max-width: 62ch; color: var(--ink-soft); }
p.lede { font-size: 1.15rem; color: var(--ink); max-width: 56ch; }

.mono { font-family: var(--font-mono); }

/* ---------- structural rule / spec-line device ---------- */
.rule {
  border: none;
  border-top: 1px solid var(--hairline);
  margin: 0;
}

.tag-line {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
  margin-bottom: 14px;
}
.tag-line .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--line-blue);
  flex: none;
}

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(242, 244, 243, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--hairline);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--ink);
  font-weight: 650;
  font-size: 1.15rem;
}
.brand:hover { color: var(--ink); }
.brand-logo {
  height: 50px;
  width: auto;
  display: block;
}
.brand .mark {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--paper-white);
  background: var(--ink);
  padding: 3px 6px;
  letter-spacing: 0.04em;
}
.brand .full {
  color: var(--ink-soft);
  font-weight: 400;
  font-size: 0.98rem;
  padding-left: 16px;
  border-left: 1px solid var(--hairline-strong);
  white-space: nowrap;
}
@media (max-width: 560px) {
  .brand .full { display: none; }
  .brand-logo { height: 36px; }
}

nav.primary-nav ul {
  list-style: none;
  display: flex;
  gap: 30px;
  margin: 0;
  padding: 0;
}
nav.primary-nav a {
  color: var(--ink-soft);
  font-size: 0.94rem;
  font-weight: 500;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
}
nav.primary-nav a:hover,
nav.primary-nav a.active {
  color: var(--ink);
  border-bottom-color: var(--line-blue);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--hairline-strong);
  padding: 8px 10px;
  cursor: pointer;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: "";
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink);
  position: relative;
  transition: var(--transition-fast);
}
.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after { position: absolute; top: 6px; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 22px;
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper-white);
  cursor: pointer;
  transition: var(--transition-fast);
}
.btn:hover { background: var(--line-blue-dk); border-color: var(--line-blue-dk); color: var(--paper-white); }
.btn.ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--hairline-strong);
}
.btn.ghost:hover { border-color: var(--ink); background: var(--paper-alt); color: var(--ink); }

/* ---------- hero: title-block layout ---------- */
.hero {
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--hairline);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 56px;
  align-items: start;
}
.hero-copy .eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--line-blue-dk);
  letter-spacing: 0.02em;
  margin-bottom: 18px;
  display: block;
}
.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 28px;
  flex-wrap: wrap;
}

/* title-block panel, styled after a drawing title block */
.titleblock {
  border: 1px solid var(--hairline-strong);
  background: var(--paper-white);
}
.titleblock .tb-row {
  display: grid;
  grid-template-columns: 108px 1fr;
  border-bottom: 1px solid var(--hairline);
}
.titleblock .tb-row:last-child { border-bottom: none; }
.titleblock .tb-key {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-soft);
  padding: 13px 12px;
  border-right: 1px solid var(--hairline);
  background: var(--paper-alt);
  display: flex;
  align-items: center;
}
.titleblock .tb-val {
  padding: 13px 14px;
  font-size: 0.92rem;
  color: var(--ink);
  display: flex;
  align-items: center;
}
.titleblock .tb-val strong { font-weight: 650; }

/* ---------- sections ---------- */
section { padding: 76px 0; }
section.alt { background: var(--paper-alt); }
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  margin-bottom: 44px;
  flex-wrap: wrap;
}
.section-head p { margin: 0; }

/* ---------- BOM-style numbered service list ---------- */
.bom {
  border-top: 1px solid var(--hairline-strong);
}
.bom-row {
  display: grid;
  grid-template-columns: 64px 1.1fr 1.4fr;
  gap: 28px;
  padding: 30px 0;
  border-bottom: 1px solid var(--hairline);
}
.bom-row .item-no {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--line-blue-dk);
  padding-top: 3px;
}
.bom-row h3 { margin-bottom: 8px; }
.bom-row .item-body p { margin-bottom: 10px; }
.bom-row ul {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--ink-soft);
}
.bom-row li { margin-bottom: 6px; }

@media (max-width: 860px) {
  .bom-row { grid-template-columns: 40px 1fr; }
  .bom-row .item-body { grid-column: 2; }
}

/* ---------- capability grid ---------- */
.cap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--hairline-strong);
  border: 1px solid var(--hairline-strong);
}
.cap-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
.cap-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.cap-cell {
  background: var(--paper-white);
  padding: 28px 26px;
}
.cap-cell.span-2 { grid-column: span 2; }
@media (max-width: 560px) {
  .cap-cell.span-2 { grid-column: span 1; }
}
.cap-cell .num {
  font-family: var(--font-mono);
  color: var(--ink-soft);
  font-size: 0.78rem;
  display: block;
  margin-bottom: 10px;
}
@media (max-width: 860px) {
  .cap-grid,
  .cap-grid.cols-4,
  .cap-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .cap-grid,
  .cap-grid.cols-4,
  .cap-grid.cols-2 { grid-template-columns: 1fr; }
}

/* ---------- revision / process table ---------- */
.rev-table { width: 100%; border-collapse: collapse; }
.rev-table th, .rev-table td {
  text-align: left;
  padding: 16px 14px;
  border-bottom: 1px solid var(--hairline);
  vertical-align: top;
}
.rev-table thead th {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--hairline-strong);
  font-weight: 500;
}
.rev-table td.rev-code {
  font-family: var(--font-mono);
  color: var(--line-blue-dk);
  white-space: nowrap;
  width: 70px;
}
.rev-table td strong { display: block; margin-bottom: 4px; }
.rev-table td span { color: var(--ink-soft); font-size: 0.92rem; }
@media (max-width: 700px) {
  .rev-table thead { display: none; }
  .rev-table, .rev-table tbody, .rev-table tr, .rev-table td { display: block; width: 100%; }
  .rev-table tr { border-bottom: 1px solid var(--hairline-strong); padding: 14px 0; }
  .rev-table td { border-bottom: none; padding: 4px 0; }
}

/* ---------- stat strip ---------- */
.stat-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--hairline-strong);
  border-bottom: 1px solid var(--hairline-strong);
}
.stat {
  padding: 26px 22px;
  border-left: 1px solid var(--hairline);
}
.stat:first-child { border-left: none; }
.stat .value {
  font-family: var(--font-mono);
  font-size: 1.7rem;
  color: var(--ink);
  display: block;
}
.stat .label {
  color: var(--ink-soft);
  font-size: 0.85rem;
}
@media (max-width: 780px) {
  .stat-strip { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3) { border-left: none; }
}

/* ---------- callout / seal ---------- */
.callout {
  border: 1px solid var(--hairline-strong);
  background: var(--paper-white);
  padding: 36px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 24px;
  align-items: center;
}
.callout .seal {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--copper);
  border: 1px solid var(--copper);
  padding: 10px 12px;
  white-space: nowrap;
}
@media (max-width: 640px) {
  .callout { grid-template-columns: 1fr; }
}

/* ---------- about / person ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 56px;
}
.about-grid ul.creds {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
}
.about-grid ul.creds li {
  padding: 10px 0;
  border-bottom: 1px solid var(--hairline);
  color: var(--ink-soft);
  font-size: 0.92rem;
}
@media (max-width: 860px) {
  .about-grid { grid-template-columns: 1fr; }
}

/* ---------- contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
}
form.contact-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.field { display: flex; flex-direction: column; gap: 6px; }
.field label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-soft);
}
.field input,
.field textarea,
.field select {
  border: 1px solid var(--hairline-strong);
  background: var(--paper-white);
  padding: 12px 14px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--ink);
}
.field textarea { resize: vertical; min-height: 130px; }
.form-note { font-size: 0.82rem; color: var(--ink-soft); }
#form-status { font-size: 0.9rem; margin-top: 6px; }
#form-status[data-state="success"] { color: #1F7A45; }
#form-status[data-state="error"] { color: var(--copper); }

.contact-list { list-style: none; padding: 0; margin: 0 0 28px; }
.contact-list li {
  display: grid;
  grid-template-columns: 96px 1fr;
  padding: 12px 0;
  border-bottom: 1px solid var(--hairline);
  font-size: 0.95rem;
}
.contact-list .k { font-family: var(--font-mono); font-size: 0.72rem; color: var(--ink-soft); padding-top: 3px; }

@media (max-width: 860px) {
  .contact-grid { grid-template-columns: 1fr; }
}

/* ---------- footer ---------- */
footer.site-footer {
  border-top: 1px solid var(--hairline-strong);
  padding: 40px 0;
}
.footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-grid p { margin: 0; font-size: 0.85rem; color: var(--ink-soft); }
.footer-links { display: flex; gap: 20px; list-style: none; padding: 0; margin: 0; }
.footer-links a { font-size: 0.85rem; color: var(--ink-soft); }
.footer-links a:hover { color: var(--ink); }

/* ---------- utility ---------- */
.center { text-align: center; }
.mt-0 { margin-top: 0; }
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ink);
  color: var(--paper-white);
  padding: 10px 16px;
  z-index: 100;
}
.skip-link:focus { left: 12px; top: 12px; }

/* ---------- responsive nav (mobile) ---------- */
@media (max-width: 880px) {
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
  nav.primary-nav {
    position: fixed;
    inset: 76px 0 auto 0;
    background: var(--paper-white);
    border-bottom: 1px solid var(--hairline-strong);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: transform var(--transition-fast), opacity var(--transition-fast), visibility var(--transition-fast);
  }
  nav.primary-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }
  nav.primary-nav ul {
    flex-direction: column;
    gap: 0;
    padding: 8px var(--gutter) 20px;
  }
  nav.primary-nav a { display: block; padding: 14px 0; border-bottom: 1px solid var(--hairline); }
  .hero-grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  section { padding: 52px 0; }
  .hero { padding: 48px 0 40px; }
}