/* =========================================================================
   PWG QUANTUM — STYLESHEET
   Design system: light, precise, restrained. Built for a deep-tech
   hardware audience (engineers, technical buyers, procurement).
   ========================================================================= */

/* ---------- Design tokens ---------- */
:root {
  /* Color */
  --color-bg: #FAFBFC;
  --color-bg-alt: #F1F4F7;
  --color-surface: #FFFFFF;
  --color-ink: #0B1F33;          /* primary text / dark navy */
  --color-ink-secondary: #4A5C6E; /* secondary text / slate */
  --color-accent: #1D5C8A;        /* restrained blue accent */
  --color-accent-dark: #123F60;   /* accent hover/active */
  --color-border: #DCE3E9;
  --color-border-strong: #C3CDD6;
  --color-mission-bg: #0B1F33;
  --color-mission-text: #EDF2F6;

  /* Status colors — muted, not traffic-light bright */
  --status-available-bg: #E7F0E9;
  --status-available-text: #2C6B45;
  --status-development-bg: #EAF1F7;
  --status-development-text: #1D5C8A;
  --status-rd-bg: #F1EEF7;
  --status-rd-text: #5A4B8A;

  /* Type */
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  /* Layout */
  --max-width: 1160px;
  --header-height: 76px;
  --radius-sm: 3px;
  --transition-fast: 160ms ease;
  --transition-med: 260ms ease;
}

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

body, h1, h2, h3, p, ul, figure { margin: 0; }
ul { padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }

body {
  font-family: var(--font-body);
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Visible keyboard focus throughout */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

h1, h2, h3 {
  color: var(--color-ink);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

h1 { font-size: clamp(2rem, 3.4vw + 1rem, 3.1rem); font-weight: 650; }
h2 { font-size: clamp(1.5rem, 1.6vw + 1rem, 2.1rem); }
h3 { font-size: 1.15rem; }

p { color: var(--color-ink-secondary); max-width: 62ch; }

/* ---------- Layout helpers ---------- */
.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}

.section {
  padding: 96px 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-head {
  max-width: 640px;
  margin-bottom: 48px;
}

.section-head h2 {
  margin-bottom: 16px;
}

.section-intro {
  max-width: 56ch;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 26px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid transparent;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
}

.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--color-accent);
  color: #FFFFFF;
}
.btn-primary:hover { background: var(--color-accent-dark); }

.btn-secondary {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-border-strong);
}
.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-secondary[disabled] {
  color: var(--color-ink-secondary);
  border-color: var(--color-border);
  cursor: not-allowed;
}
.btn-secondary[disabled]:hover {
  border-color: var(--color-border);
  color: var(--color-ink-secondary);
}

.btn-small {
  padding: 9px 18px;
  font-size: 0.875rem;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(250, 251, 252, 0.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid transparent;
  z-index: 100;
  transition: border-color var(--transition-med), box-shadow var(--transition-med);
}

.site-header.is-scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: 0 1px 0 rgba(11, 31, 51, 0.02);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  height: 100%;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-ink);
}
.logo-mark { display: flex; }
.logo-mark img { display: block; }
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-title { font-weight: 700; font-size: 1rem; letter-spacing: -0.01em; }
.logo-sub { font-size: 0.72rem; color: var(--color-ink-secondary); }

.main-nav ul {
  display: flex;
  gap: 32px;
}

.main-nav a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-ink);
  padding: 6px 0;
  border-bottom: 1px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.main-nav a:hover,
.main-nav a.is-active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Mobile nav toggle (hidden on desktop) */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  padding: 0;
}
.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--color-ink);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  padding: calc(var(--header-height) + 64px) 0 96px;
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-logo {
  height: 40px;
  width: auto;
  margin-bottom: 28px;
}

.hero-lede {
  margin-top: 20px;
  font-size: 1.08rem;
  max-width: 54ch;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-top: 36px;
  flex-wrap: wrap;
}

.hero-figure {
  color: var(--color-ink);
}

.hero-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

/* ---------- Products ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.product-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: border-color var(--transition-fast);
}

.product-card:hover {
  border-color: var(--color-border-strong);
}

.product-card-head {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.status {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  padding: 4px 10px;
  border-radius: 999px;
}

.status-available { background: var(--status-available-bg); color: var(--status-available-text); }
.status-development { background: var(--status-development-bg); color: var(--status-development-text); }
.status-rd { background: var(--status-rd-bg); color: var(--status-rd-text); }
.status-planned { background: var(--color-bg-alt); color: var(--color-ink-secondary); border: 1px solid var(--color-border-strong); }
.status-future { background: #F7EEF2; color: #8A4B63; }

.option-list li {
  position: relative;
  padding-left: 18px;
  color: var(--color-ink-secondary);
  font-size: 0.94rem;
  margin-bottom: 8px;
}
.option-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 1px;
  background: var(--color-border-strong);
}

.card-link {
  margin-top: auto;
  font-weight: 600;
  color: var(--color-accent);
  font-size: 0.94rem;
  transition: color var(--transition-fast);
}
.card-link:hover { color: var(--color-accent-dark); }

.catalog-cta {
  margin-top: 48px;
  display: flex;
  justify-content: center;
}

/* Key spec banner (used on Product Families) */
.spec-strip {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 40px;
}
.spec-strip-item {
  background: var(--color-surface);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.spec-strip-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-ink-secondary);
}
.spec-strip-value {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  color: var(--color-ink);
  font-weight: 600;
}

/* ---------- Applications ---------- */
.applications-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px 32px;
}

.app-item { color: var(--color-ink); }

.app-icon {
  display: inline-flex;
  color: var(--color-accent);
  margin-bottom: 14px;
}

.app-item h3 { margin-bottom: 8px; font-size: 1.05rem; }
.app-item p { font-size: 0.92rem; }

/* ---------- Technology ---------- */
.technology-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.technology-copy h2 { margin-bottom: 20px; }
.technology-copy p { margin-bottom: 16px; max-width: 58ch; }

/* Coupled-system trade-off grid (Technology section) */
.tradeoff-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 28px;
}
.tradeoff-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 22px;
}
.tradeoff-item h3 { font-size: 1rem; margin-bottom: 8px; color: var(--color-accent); }
.tradeoff-item p { font-size: 0.88rem; }

.phononic-callout {
  margin-top: 32px;
  padding: 24px 26px;
  background: var(--color-bg-alt);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm);
  max-width: 72ch;
}
.phononic-callout h3 { font-size: 1rem; margin-bottom: 8px; }
.phononic-callout p { font-size: 0.92rem; margin: 0; }

/* Performance data placeholder grid */
.perf-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}
.perf-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-start;
}
.perf-card h3 { font-size: 0.98rem; }
.perf-card p { font-size: 0.86rem; }

/* ---------- Mission ---------- */
.mission {
  background: var(--color-mission-bg);
  padding: 120px 0;
}

.mission-statement {
  color: var(--color-mission-text);
  font-size: clamp(1.3rem, 1.6vw + 1rem, 1.9rem);
  font-weight: 500;
  line-height: 1.45;
  max-width: 46ch;
  letter-spacing: -0.005em;
}

/* ---------- Customer Portal ---------- */
.portal-inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 56px;
  align-items: start;
}

.portal-copy p { margin-bottom: 20px; }

.portal-actions {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: flex-start;
}

.portal-note {
  font-size: 0.88rem;
}
.portal-note a { color: var(--color-accent); font-weight: 600; }
.portal-note a:hover { color: var(--color-accent-dark); }

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.contact-action {
  display: block;
  padding: 26px 22px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.contact-action:hover {
  border-color: var(--color-accent);
  background: var(--color-bg-alt);
}

.contact-action h3 { margin-bottom: 8px; font-size: 1rem; }
.contact-action p { font-size: 0.88rem; }

.contact-direct {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: baseline;
  gap: 24px;
  flex-wrap: wrap;
}

.contact-direct a {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-accent);
}
.contact-direct a:hover { color: var(--color-accent-dark); }

.contact-domain {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-ink-secondary);
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 40px 0;
  background: var(--color-bg-alt);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.footer-brand { display: flex; align-items: center; gap: 10px; line-height: 1.3; }
.footer-text { display: flex; flex-direction: column; }
.footer-logo { flex-shrink: 0; }

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}
.footer-nav a {
  font-size: 0.86rem;
  color: var(--color-ink-secondary);
}
.footer-nav a:hover { color: var(--color-accent); }

.footer-copy {
  font-size: 0.82rem;
  color: var(--color-ink-secondary);
  width: 100%;
  order: 3;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
}

/* ---------- Scroll reveal (subtle, single-pass) ---------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 620ms ease, transform 620ms ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* =========================================================================
   RESPONSIVE
   ========================================================================= */

/* =========================================================================
   CATALOG PAGE
   ========================================================================= */

.catalog-hero .hero-figure img {
  border-radius: var(--radius-sm);
}

.catalog-notice {
  background: var(--status-development-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  font-size: 0.92rem;
  color: var(--color-ink);
  margin: 0 0 8px;
}

.section-note {
  font-size: 0.88rem;
  margin-top: 16px;
  max-width: 70ch;
}

/* Product family cards with photography */
.family-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 24px;
}

.family-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-start;
}

.family-image {
  width: 100%;
  height: 140px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: 6px;
  background: var(--color-bg-alt);
}

/* Feature highlight grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px 28px;
}
.feature-item h3 { margin-bottom: 8px; font-size: 1.02rem; }
.feature-item p { font-size: 0.9rem; }

/* Connector option cards */
.connector-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}
.connector-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 20px;
  text-align: center;
  background: var(--color-surface);
}
.connector-image {
  height: 70px;
  width: 100%;
  object-fit: contain;
  margin-bottom: 14px;
}
.connector-card h3 { font-family: var(--font-mono); font-size: 0.95rem; margin-bottom: 6px; }
.connector-card p { font-size: 0.84rem; }

/* Part-number scheme */
.scheme-string {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--color-ink);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  margin-bottom: 28px;
  overflow-x: auto;
  white-space: nowrap;
}
.scheme-string span { color: var(--color-accent); font-weight: 700; }

.lengths-block { margin-top: 40px; }
.lengths-block h3 { margin-bottom: 16px; }
.option-list.two-col {
  columns: 2;
  column-gap: 32px;
}
.option-list.two-col li { font-family: var(--font-mono); font-size: 0.88rem; }

/* Data tables (model lineup, scheme, specs) */
.table-scroll { overflow-x: auto; }

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  background: var(--color-surface);
}
.data-table th,
.data-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  white-space: nowrap;
}
.data-table thead th {
  color: var(--color-ink-secondary);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  border-bottom: 1px solid var(--color-border-strong);
}
.data-table tbody tr:hover { background: var(--color-bg-alt); }
.data-table td.mono,
.data-table th.mono { font-family: var(--font-mono); font-size: 0.84rem; }

.scheme-table { max-width: 640px; }
.spec-table th { color: var(--color-ink-secondary); font-weight: 500; padding-left: 0; }
.spec-table td { font-weight: 600; }

/* Option key */
.option-key-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.option-key-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 20px;
}
.option-key-item p { font-size: 0.92rem; }

.coil-image {
  margin-top: 24px;
  max-width: 220px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

@media (max-width: 960px) {
  .family-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .connector-grid { grid-template-columns: repeat(2, 1fr); }
  .option-key-grid { grid-template-columns: 1fr; }

  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .applications-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .technology-inner,
  .portal-inner {
    grid-template-columns: 1fr;
  }
  .technology-figure { order: -1; max-width: 360px; }

  .spec-strip { grid-template-columns: repeat(2, 1fr); }
  .tradeoff-grid { grid-template-columns: repeat(2, 1fr); }
  .perf-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 620px) {
  .feature-grid { grid-template-columns: 1fr; }
  .connector-grid { grid-template-columns: 1fr; }
  .option-list.two-col { columns: 1; }
}

@media (max-width: 800px) {
  .main-nav { display: none; }
  .nav-toggle { display: flex; }

  .main-nav.is-open {
    display: block;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 12px 32px 24px;
  }
  .main-nav.is-open ul {
    flex-direction: column;
    gap: 4px;
  }
  .main-nav.is-open a {
    display: block;
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
  }

  .hero { padding-top: calc(var(--header-height) + 40px); }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-figure { max-width: 320px; margin: 0 auto; }

  .header-actions .btn-small { display: none; }
}

@media (max-width: 620px) {
  .section { padding: 64px 0; }
  .section-inner { padding: 0 20px; }
  .header-inner { padding: 0 20px; }
  .hero-inner { padding: 0 20px; }

  .product-grid { grid-template-columns: 1fr; }
  .applications-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }

  .spec-strip { grid-template-columns: 1fr; }
  .tradeoff-grid { grid-template-columns: 1fr; }
  .perf-grid { grid-template-columns: 1fr; }

  .logo-sub { display: none; }
  .mission { padding: 80px 0; }
}