/* MD Industrial Services — homepage styles.
   Design system "Industry": tokens and component classes (.btn, .tag, .blueprint, .nav)
   are reproduced from the handoff design system; page layout follows the handoff README. */

/* ─── Tokens ─────────────────────────────────────────────────────────────── */
:root {
  --color-bg: #f2f2f3;
  --color-surface: #e9e9ea;
  --color-text: #1d1f20;
  --color-accent: #5980a6;
  --color-accent-100: #eef6ff;
  --color-accent-300: #b5d9fd;
  --color-accent-600: #597ea3;
  --color-accent-700: #416180;
  --color-accent-800: #2c455d;
  --color-accent-900: #1d2d3d;
  --color-neutral-200: #e7e7ea;
  --color-divider: color-mix(in srgb, #1d1f20 16%, transparent);

  --ink-78: color-mix(in srgb, var(--color-text) 78%, transparent);
  --ink-72: color-mix(in srgb, var(--color-text) 72%, transparent);
  --ink-70: color-mix(in srgb, var(--color-text) 70%, transparent);
  --ink-65: color-mix(in srgb, var(--color-text) 65%, transparent);
  --ink-55: color-mix(in srgb, var(--color-text) 55%, transparent);
  --ink-50: color-mix(in srgb, var(--color-text) 50%, transparent);
  --accent-55: color-mix(in srgb, var(--color-accent) 55%, transparent);

  --font-heading: "Barlow Condensed", system-ui, sans-serif;
  --font-heading-weight: 600;
  --font-body: "Barlow", system-ui, sans-serif;

  --radius-md: 4px;
  --gutter: 32px;
}

/* ─── Base ───────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; background: var(--color-bg); color: var(--color-text);
  font-family: var(--font-body); font-size: 15px; line-height: 1.55; font-weight: 400;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  line-height: 1.12; letter-spacing: -0.015em; margin: 0;
}
p { margin: 0; }
a { color: var(--color-accent); text-underline-offset: 3px; }
a:hover { color: var(--color-accent-700); }
:focus { outline: none; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
::selection { background: color-mix(in srgb, var(--color-accent) 30%, transparent); }
ol, ul { margin: 0; padding: 0; list-style: none; }

.page { min-height: 100vh; display: flex; flex-direction: column; }

/* ─── Type helpers ───────────────────────────────────────────────────────── */
.kicker {
  font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--color-accent-700); margin: 0 0 8px;
}
.kicker-light { color: var(--color-accent-300); }
.h2 { font-size: clamp(30px, 3.4vw, 42px); line-height: 1.05; letter-spacing: -0.015em; text-wrap: balance; }
.h2-sm { font-size: clamp(26px, 2.8vw, 34px); line-height: 1.08; letter-spacing: -0.015em; text-wrap: balance; }
.intro { font-size: 15px; line-height: 1.55; color: var(--ink-72); text-wrap: pretty; }
.lead { font-size: 17px; line-height: 1.5; text-wrap: pretty; }
.label-tech {
  font-family: var(--font-heading); font-weight: 500; font-size: 13px;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-55);
}
.label-tech.accent { color: var(--color-accent-700); }

/* ─── Components (DS) ────────────────────────────────────────────────────── */
.blueprint { position: relative; border: 1px solid var(--color-divider); border-radius: 0; }
.blueprint > .corner { position: absolute; width: 11px; height: 11px; color: var(--ink-55); pointer-events: none; }
.blueprint > .corner::before, .blueprint > .corner::after { content: ""; position: absolute; background: currentColor; }
.blueprint > .corner::before { left: 5px; top: 0; width: 1px; height: 100%; }
.blueprint > .corner::after  { top: 5px; left: 0; width: 100%; height: 1px; }
.blueprint > .corner.tl { top: -6px; left: -6px; }
.blueprint > .corner.tr { top: -6px; right: -6px; }
.blueprint > .corner.bl { bottom: -6px; left: -6px; }
.blueprint > .corner.br { bottom: -6px; right: -6px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  cursor: pointer; text-decoration: none;
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 14px; line-height: 1.2; color: var(--color-text);
  background: transparent; border: 1px solid var(--color-divider);
  padding: 7px 12px; border-radius: var(--radius-md);
  transition: background-color .15s ease, color .15s ease;
}
.btn-lg { padding: 10px 18px; font-size: 15px; }
.btn-primary { background: var(--color-accent); border-color: var(--color-accent); color: var(--color-bg); }
.btn-primary:hover { background: var(--color-accent-600); color: var(--color-bg); }
.btn-primary:active { background: var(--color-accent-700); }
.btn-secondary:hover { background: color-mix(in srgb, var(--color-text) 7%, transparent); color: var(--color-text); }
.btn-secondary:active { background: color-mix(in srgb, var(--color-text) 14%, transparent); }
.btn.blueprint { border-radius: var(--radius-md); }

.tag {
  display: inline-flex; align-items: center; font-size: 11px; letter-spacing: 0.02em;
  padding: 3px 10px; border-radius: 0;
}
.tag-outline { border: 1px solid var(--color-accent); color: var(--color-accent); }
.tag-upper { font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }

/* ─── Header ─────────────────────────────────────────────────────────────── */
.nav {
  position: relative; z-index: 2;
  display: flex; align-items: center; gap: 14px;
  padding: 16px var(--gutter); border-bottom: 1px solid var(--color-divider);
}
.nav-brand {
  display: flex; align-items: center; gap: 10px; margin-right: auto;
  font-family: var(--font-heading); font-weight: var(--font-heading-weight); font-size: 18px;
  color: inherit; text-decoration: none;
}
.brand-logo { display: block; height: 48px; width: auto; }
.nav-links { display: flex; gap: 24px; }
.nav-links a { color: inherit; text-decoration: none; font-size: 14px; }
.nav-links a:hover { color: var(--color-accent); }
.nav-lang { display: flex; gap: 2px; margin-left: 10px; padding-left: 14px; border-left: 1px solid var(--color-divider); }
.nav-lang a {
  color: var(--ink-55); text-decoration: none; padding: 2px 5px;
  font-family: var(--font-heading); font-size: 13px; letter-spacing: 0.08em;
}
.nav-lang a:hover { color: var(--color-accent); }
.nav-lang a[aria-current="true"] { color: var(--color-accent); box-shadow: inset 0 -1px 0 var(--color-accent); }

/* ─── Hero ───────────────────────────────────────────────────────────────── */
.hero {
  position: relative; min-height: max(560px, calc(100vh - 61px));
  display: flex; align-items: center; overflow: hidden;
  background-image: radial-gradient(color-mix(in srgb, var(--color-text) 9%, transparent) 1px, transparent 1px);
  background-size: 32px 32px; background-position: 16px 16px;
}
.hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.hero-copy {
  position: relative; z-index: 1; padding: 64px var(--gutter) 96px; max-width: 580px;
  display: flex; flex-direction: column; gap: 20px; pointer-events: none;
}
.hero-copy .kicker { margin: 0; }
.hero-title { font-size: clamp(42px, 6vw, 72px); line-height: 1.02; letter-spacing: -0.02em; text-wrap: balance; }
.hero-lead { font-size: 17px; line-height: 1.5; max-width: 460px; color: var(--ink-78); text-wrap: pretty; }
.hero-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 8px; pointer-events: auto; }
.hero-caps { margin-top: 20px; }

/* ─── Sections ───────────────────────────────────────────────────────────── */
.section { padding: 0 var(--gutter) 96px; }
.section-head {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
  gap: 40px; align-items: end;
}
.section-head.align-start { align-items: start; }
.section-head.rule { border-top: 1px solid var(--color-divider); padding-top: 40px; }
.section-head.accent-rule { border-top: 1px solid var(--accent-55); padding-top: 40px; }
.section-head.rule-blue { border-top: 1px solid var(--color-accent-300); padding-top: 40px; }
.section-head .intro { max-width: 520px; }
.section-head > .h2, .section-head > div > .h2, .section-head > div > .h2-sm { margin: 0; }
.intro-col { display: flex; flex-direction: column; gap: 12px; max-width: 560px; }
.intro-col.wide { max-width: 640px; gap: 16px; }
.subsection { margin-top: 64px; }
.grid { margin-top: 48px; display: grid; gap: 24px; }

/* Process */
.process { position: relative; padding-top: 0; }
.connector { position: relative; height: 88px; margin: 0 calc(-1 * var(--gutter)); }
.connector-line { position: absolute; top: 0; bottom: 0; left: 64%; width: 1px; background: var(--accent-55); }
.connector-node {
  position: absolute; bottom: -3px; left: 64%; width: 7px; height: 7px; margin-left: -3px;
  border: 1px solid var(--color-accent); background: var(--color-bg);
}
.process-grid { grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); }
.process-card { padding: 20px 20px 24px; display: flex; flex-direction: column; gap: 10px; min-height: 180px; }
.process-card .num { font-family: var(--font-heading); font-size: 13px; letter-spacing: 0.1em; color: var(--color-accent-700); }
.process-card h3 { font-size: 22px; }
.process-card p { font-size: 14px; line-height: 1.5; color: var(--ink-70); }

/* Project management — dark field */
.management-panel {
  background: var(--color-accent-900); color: var(--color-bg);
  padding: 64px 48px 56px; display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 3fr);
  gap: 48px; align-items: start;
}
.management-intro { display: flex; flex-direction: column; gap: 20px; position: sticky; top: 32px; }
.management-intro .kicker { margin: 0; }
.management-title { font-size: clamp(34px, 4vw, 54px); line-height: 1.02; letter-spacing: -0.02em; text-wrap: balance; }
.management-intro p { font-size: 15px; line-height: 1.55; max-width: 440px; text-wrap: pretty; color: color-mix(in srgb, var(--color-bg) 78%, transparent); }
.management-claim {
  margin-top: 12px; padding-top: 16px;
  border-top: 1px solid color-mix(in srgb, var(--color-bg) 25%, transparent);
  color: var(--color-accent-300);
}
.ledger { display: flex; flex-direction: column; border-top: 1px solid color-mix(in srgb, var(--color-bg) 25%, transparent); }
.ledger-row {
  display: grid; grid-template-columns: 72px minmax(0, 1fr) minmax(0, 1.6fr); gap: 24px; align-items: baseline;
  padding: 22px 0; border-bottom: 1px solid color-mix(in srgb, var(--color-bg) 25%, transparent);
}
.ledger-num { font-family: var(--font-heading); font-weight: var(--font-heading-weight); font-size: 36px; line-height: 1; letter-spacing: -0.02em; color: var(--color-accent-300); }
.ledger-row h3 { font-size: 22px; line-height: 1.1; }
.ledger-row p { font-size: 14px; line-height: 1.5; color: color-mix(in srgb, var(--color-bg) 72%, transparent); text-wrap: pretty; }

/* Bordered cells (Services, Collaborative) */
.cells {
  margin-top: 48px; display: grid;
  border-top: 1px solid var(--color-divider); border-left: 1px solid var(--color-divider);
}
.services-grid { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.cell {
  padding: 28px 24px 32px; display: flex; flex-direction: column; gap: 12px;
  border-right: 1px solid var(--color-divider); border-bottom: 1px solid var(--color-divider);
}
.cell h3 { font-size: 24px; }
.cell p { font-size: 14px; line-height: 1.5; color: var(--ink-70); text-wrap: pretty; }
.chips {
  margin-top: auto; padding-top: 8px; display: flex; flex-wrap: wrap; gap: 6px 14px;
  font-family: var(--font-heading); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-50);
}
.cells-blue { border-color: var(--color-accent-300); align-content: start; margin-top: 0; }
.cells-blue .cell { border-color: var(--color-accent-300); padding: 24px 22px 28px; gap: 10px; }

/* Projects */
.projects-grid { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); align-items: start; }
.project-card { display: flex; flex-direction: column; cursor: pointer; text-align: left; background: transparent; color: inherit; font: inherit; width: 100%; }
.project-card:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
.project-figure { height: 150px; border-bottom: 1px solid var(--color-divider); }
.project-figure svg { display: block; width: 100%; height: 100%; }
.project-body { padding: 20px 20px 22px; display: flex; flex-direction: column; gap: 10px; }
.project-body .label-tech { font-size: 12px; }
.project-body h3 { font-size: 24px; line-height: 1.1; }
.project-headline { font-size: 15px; font-weight: 500; line-height: 1.35; text-wrap: pretty; }
.project-body p { font-size: 14px; line-height: 1.5; color: var(--ink-70); text-wrap: pretty; }
.project-more { display: none; flex-direction: column; gap: 14px; margin-top: 6px; border-top: 1px solid var(--color-divider); padding-top: 14px; }
.project-card[aria-expanded="true"] .project-more { display: flex; }
.project-more .label-tech { font-size: 12px; margin-bottom: 6px; }
.project-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.project-tags .tag { font-size: 12px; }
.project-roles { display: flex; flex-wrap: wrap; gap: 4px 14px; font-size: 13px; color: var(--ink-70); }
.project-cta { margin-top: 6px; font-family: var(--font-heading); font-weight: 500; font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-accent); }
.proof-strip {
  margin-top: 40px; padding: 20px 0; display: grid; gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  border-top: 1px solid var(--color-divider); border-bottom: 1px solid var(--color-divider);
}
.proof-text { font-size: 14px; margin-top: 6px; color: var(--ink-70); }

/* Full-bleed fields */
.field { padding: 64px var(--gutter) 72px; margin-bottom: 96px; }
.field-grey { background: var(--color-neutral-200); }
.field-blue { background: var(--color-accent-100); }

/* R&D progression */
.progression { margin-top: 40px; display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); }
.stage { position: relative; padding: 18px 16px 20px 0; display: flex; flex-direction: column; gap: 8px; }
.stage-line { display: flex; align-items: center; gap: 10px; }
.stage .node { width: 7px; height: 7px; border: 1px solid var(--color-accent); background: var(--color-neutral-200); flex: none; }
.stage .line { flex: 1; height: 1px; background: var(--accent-55); }
.stage:last-child .line { background: transparent; }
.stage-note { font-size: 13px; line-height: 1.45; color: var(--ink-65); }

/* Collaborative */
.collab-grid { margin-top: 48px; display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); gap: 24px; align-items: start; }
.collab-figure { display: flex; }
.collab-diagram { flex: 1; aspect-ratio: 560 / 300; }
.collab-diagram svg { display: block; width: 100%; height: 100%; }
.collab-cells { grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); }

/* About */
.about-col { display: flex; flex-direction: column; gap: 20px; max-width: 640px; }
.cap-row {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 24px;
  margin-top: 12px; border-top: 1px solid var(--color-divider); padding-top: 20px;
}
.cap-note { font-size: 14px; margin-top: 8px; line-height: 1.45; color: var(--ink-70); }
.company {
  margin-top: 64px; border-top: 1px solid var(--color-divider); padding-top: 24px;
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 2fr); gap: 40px;
}
.company .kicker { margin: 0; }
.company-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 16px 24px;
  font-size: 13px; color: var(--ink-70);
}
.company-key { color: var(--color-text); }

/* Certification (ISO 9001) */
.certification { margin-top: 40px; }
.cert-card { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 28px; padding: 28px; max-width: 760px; }
.cert-thumb { position: relative; display: block; align-self: start; border: 1px solid var(--color-divider); background: #fff; line-height: 0; cursor: zoom-in; overflow: hidden; transition: border-color .2s ease, box-shadow .3s ease, transform .3s cubic-bezier(.2,.8,.2,1); }
.cert-thumb:hover, .cert-thumb:focus-visible { border-color: var(--color-accent); transform: translateY(-3px); box-shadow: 0 12px 28px -12px rgba(29, 45, 61, .35); outline: none; }
.cert-thumb img { width: 100%; height: auto; transition: transform .5s cubic-bezier(.2,.8,.2,1); }
.cert-thumb:hover img { transform: scale(1.04); }
.cert-thumb::after {
  content: ""; position: absolute; right: 8px; bottom: 8px; width: 30px; height: 30px; border-radius: 50%;
  background: var(--color-accent) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23f2f2f3' stroke-width='2' stroke-linecap='round'%3E%3Ccircle cx='10.5' cy='10.5' r='6'/%3E%3Cpath d='M15 15l5 5M10.5 8v5M8 10.5h5'/%3E%3C/svg%3E") center / 16px no-repeat;
  opacity: 0; transform: scale(.7); transition: opacity .2s ease, transform .25s cubic-bezier(.2,.8,.2,1);
}
.cert-thumb:hover::after, .cert-thumb:focus-visible::after { opacity: 1; transform: none; }

/* Certificate lightbox */
.cert-lightbox-open { overflow: hidden; }
.cert-lightbox { position: fixed; inset: 0; z-index: 1000; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 18px; padding: 32px 16px; }
.cert-lightbox-backdrop { position: absolute; inset: 0; background: color-mix(in srgb, var(--color-accent-900) 82%, transparent); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); cursor: zoom-out; }
.cert-lightbox-img {
  position: relative; display: block; width: auto; height: auto; max-width: min(92vw, 640px); max-height: calc(100vh - 140px); max-height: calc(100dvh - 140px);
  background: #fff; transform-origin: top left; cursor: zoom-out; box-shadow: 0 30px 80px -20px rgba(0, 0, 0, .55);
}
.cert-lightbox-bar { position: relative; display: flex; gap: 10px; }
.cert-lightbox-bar .btn-secondary { background: var(--color-bg); }
@media (prefers-reduced-motion: reduce) { .cert-thumb, .cert-thumb img, .cert-thumb::after { transition: none; } }
.cert-body { display: flex; flex-direction: column; gap: 10px; }
.cert-title { font-size: 28px; line-height: 1.05; }
.cert-text { font-size: 14px; line-height: 1.5; color: var(--ink-70); text-wrap: pretty; max-width: 520px; }
.cert-meta { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 12px 24px; font-size: 13px; color: var(--ink-70); padding-top: 4px; }
.cert-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 8px; }

/* Contact */
.contact { padding-bottom: 64px; }
.contact-block { padding: 48px 40px; display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); gap: 40px; align-items: center; }
.contact-copy { display: flex; flex-direction: column; gap: 12px; }
.contact-copy .kicker { margin: 0; }
.contact-copy .intro { max-width: 460px; }
.contact-actions { display: flex; flex-direction: column; gap: 12px; align-items: flex-start; }

/* Footer */
.footer {
  padding: 24px var(--gutter); border-top: 1px solid var(--color-divider);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  font-size: 13px; color: var(--ink-55);
}
.footer a { color: inherit; }
.footer-legal { flex-basis: 100%; color: var(--ink-55); }
.footer-tag { font-family: var(--font-heading); font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; }

/* ─── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 1023px) {
  .management-panel { grid-template-columns: minmax(0, 1fr); padding: 48px 32px 40px; gap: 32px; }
  .management-intro { position: static; }
}

@media (max-width: 719px) {
  :root { --gutter: 20px; }
  .nav { flex-wrap: wrap; gap: 10px 16px; }
  .nav-links { gap: 16px; flex-wrap: wrap; }
  .nav-links a { font-size: 13px; }
  .nav-lang { margin-left: 0; padding-left: 0; border-left: 0; }
  .brand-logo { height: 40px; }
  /* Mobile: animation gets its own band above the copy, no overlap. */
  .hero { align-items: flex-start; }
  .hero-canvas { inset: auto 0 auto 0; top: 0; height: 320px; }
  .hero-copy { padding: 320px var(--gutter) 64px; max-width: none; }
  .connector-line, .connector-node { left: 50%; }
  .section-head, .company, .contact-block, .collab-grid { grid-template-columns: minmax(0, 1fr); }
  .section-head { gap: 20px; }
  .management-panel { padding: 40px 20px 32px; }
  .ledger-row { grid-template-columns: 48px minmax(0, 1fr); gap: 12px 16px; }
  .ledger-row p { grid-column: 2; }
  .ledger-num { font-size: 28px; }
  .progression { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .stage:nth-child(3n) .line { background: transparent; }
  .contact-block { padding: 32px 24px; }
  .btn-lg { width: 100%; }
  .contact-actions { align-items: stretch; }
  .cert-card { grid-template-columns: 88px minmax(0, 1fr); gap: 18px; padding: 20px; }
  .cert-actions .btn { flex: 1 1 100%; }
}
@media (max-width: 420px) {
  .progression { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stage:nth-child(3n) .line { background: var(--accent-55); }
  .stage:nth-child(2n) .line { background: transparent; }
}