/* =========================================================
   ITCOMP Technologies — Design tokens
   Direction: cabinet d'ingénierie — esthétique "plan technique"
   ========================================================= */

:root {
  /* Color */
  --ink: #0A1628;        /* fond header/footer, titres */
  --navy: #14304F;       /* bleu secondaire, survols */
  --steel: #3D5A76;      /* texte moyen, icônes */
  --slate: #5B6B7D;      /* texte courant */
  --mist: #EEF2F6;       /* fond de section clair */
  --paper: #FAFBFC;      /* fond principal */
  --line: #D7DEE6;       /* filets, grille */
  --line-strong: #B9C5D1;
  --accent: #2E7AB8;     /* bleu signal — CTA, liens actifs */
  --accent-deep: #1E5C8F;/* survol accent */
  --white: #FFFFFF;

  /* Type */
  --font-display: "Space Grotesk", "IBM Plex Sans", sans-serif;
  --font-body: "IBM Plex Sans", -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  /* Scale */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6.5rem;

  --radius: 2px;
  --container: 1180px;
}

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--slate);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--ink);
  margin: 0;
  font-weight: 600;
  letter-spacing: -0.01em;
}

p { margin: 0 0 1em; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

/* Blueprint grid backdrop — subtle graph-paper texture grounded in the
   subject (technical drawings), used sparingly, never as decoration alone */
.blueprint-bg {
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: -1px -1px;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--accent);
  display: inline-block;
}

.ref-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--steel);
  letter-spacing: 0.04em;
}

/* ===================== Header ===================== */
header.site-header {
  background: var(--ink);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  position: sticky;
  top: 0;
  z-index: 50;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem var(--space-3);
  max-width: var(--container);
  margin: 0 auto;
}
.logo {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--white);
  letter-spacing: 0.01em;
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}
.logo span { color: var(--accent); }
.logo .logo-sub {
  font-size: 0.6rem;
  color: rgba(255,255,255,0.45);
  letter-spacing: 0.12em;
  font-weight: 400;
}

nav.main-nav ul {
  display: flex;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}
nav.main-nav a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: rgba(255,255,255,0.68);
  text-transform: uppercase;
  padding: 0.4rem 0;
  border-bottom: 1px solid transparent;
  transition: color .15s ease, border-color .15s ease;
}
nav.main-nav a:hover,
nav.main-nav a.active {
  color: var(--white);
  border-color: var(--accent);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid rgba(255,255,255,0.25);
  color: var(--white);
  width: 38px;
  height: 38px;
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font-mono);
}

/* ===================== Buttons ===================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.85rem 1.4rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background .15s ease, color .15s ease, border-color .15s ease;
}
.btn-primary {
  background: var(--accent);
  color: var(--white);
}
.btn-primary:hover { background: var(--accent-deep); }
.btn-ghost {
  border-color: var(--line-strong);
  color: var(--ink);
  background: transparent;
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-ghost-invert {
  border-color: rgba(255,255,255,0.3);
  color: var(--white);
}
.btn-ghost-invert:hover { border-color: var(--white); }
.btn-arrow { transition: transform .15s ease; }
.btn:hover .btn-arrow { transform: translateX(3px); }

/* ===================== Hero ===================== */
.hero {
  background: var(--ink);
  color: var(--white);
  position: relative;
  overflow: hidden;
  padding: var(--space-6) 0 var(--space-5);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, black, transparent 85%);
}
.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-5);
  align-items: center;
}
.hero h1 {
  color: var(--white);
  font-size: clamp(2.1rem, 4vw, 3.35rem);
  line-height: 1.12;
  margin: var(--space-2) 0 var(--space-3);
  max-width: 16ch;
}
.hero p.lead {
  color: rgba(255,255,255,0.68);
  font-size: 1.08rem;
  max-width: 46ch;
  margin-bottom: var(--space-4);
}
.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; }

/* Schematic diagram — signature element */
.schematic { position: relative; }
.schematic svg { width: 100%; height: auto; }

/* ===================== Sections ===================== */
section { padding: var(--space-6) 0; }
.section-tight { padding: var(--space-5) 0; }
.section-alt { background: var(--mist); }
.section-ink { background: var(--ink); color: rgba(255,255,255,0.75); }
.section-ink h2, .section-ink h3 { color: var(--white); }

.section-head {
  max-width: 640px;
  margin-bottom: var(--space-4);
}
.section-head h2 {
  font-size: clamp(1.6rem, 2.6vw, 2.1rem);
  margin-top: var(--space-1);
}

.hr {
  border: none;
  border-top: 1px solid var(--line);
  margin: var(--space-5) 0;
}

/* ===================== Cards / Grid ===================== */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.card {
  background: var(--white);
  padding: var(--space-4);
  position: relative;
}
.card .ref-tag { margin-bottom: var(--space-2); display: block; }
.card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.7rem;
}
.card ul {
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}
.card ul li {
  padding: 0.5rem 0;
  border-top: 1px solid var(--line);
  font-size: 0.93rem;
  display: flex;
  gap: 0.6rem;
}
.card ul li::before {
  content: "—";
  color: var(--accent);
  flex-shrink: 0;
}

/* corner-bracket motif, echoes technical drawing registration marks */
.bracket {
  position: relative;
}
.bracket::before, .bracket::after {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  border: 1px solid var(--accent);
}
.bracket::before { top: 10px; left: 10px; border-right: none; border-bottom: none; }
.bracket::after { bottom: 10px; right: 10px; border-left: none; border-top: none; }

/* ===================== Stats / values row ===================== */
.value-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
}
.value-item .num {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}
.value-item h4 {
  font-size: 1.02rem;
  margin: 0.5rem 0 0.4rem;
  color: var(--white);
}
.value-item p { font-size: 0.9rem; margin: 0; }

/* ===================== Timeline (réalisations) ===================== */
.case {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  border-top: 1px solid var(--line);
}
.case:last-child { border-bottom: 1px solid var(--line); }
.case-label { font-family: var(--font-mono); font-size: 0.78rem; color: var(--steel); }
.case-body h3 { margin-bottom: 0.8rem; font-size: 1.25rem; }
.case-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-2);
}
.case-meta h5 {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.4rem;
}
.case-meta p { font-size: 0.9rem; margin: 0; }

/* ===================== FAQ ===================== */
.faq-item {
  border-top: 1px solid var(--line);
  padding: var(--space-3) 0;
}
.faq-item:last-child { border-bottom: 1px solid var(--line); }
.faq-item summary {
  font-family: var(--font-display);
  color: var(--ink);
  font-weight: 600;
  font-size: 1.05rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 1.3rem;
  flex-shrink: 0;
  transition: transform .15s ease;
}
.faq-item[open] summary::after { content: "–"; }
.faq-item .faq-a {
  margin-top: 0.9rem;
  max-width: 62ch;
}

/* ===================== Jobs (carrières) ===================== */
.job {
  border-top: 1px solid var(--line);
  padding: var(--space-3) 0;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-3);
}
.job:last-child { border-bottom: 1px solid var(--line); }
.job h3 { font-size: 1.1rem; margin-bottom: 0.4rem; }
.job p { font-size: 0.93rem; margin: 0; }

/* ===================== Contact ===================== */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: var(--space-5);
}
.info-block { margin-bottom: var(--space-4); }
.info-block h4 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}
.info-block p { margin: 0; color: var(--ink); font-size: 1rem; }

form.contact-form { display: flex; flex-direction: column; gap: var(--space-2); }
.field { display: flex; flex-direction: column; gap: 0.4rem; }
.field label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--steel);
}
.field input, .field textarea {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 0.8rem 0.9rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  background: var(--white);
  color: var(--ink);
}
.field input:focus, .field textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.field textarea { resize: vertical; min-height: 130px; }

/* ===================== Footer ===================== */
footer.site-footer {
  background: var(--ink);
  color: rgba(255,255,255,0.55);
  padding: var(--space-5) 0 var(--space-3);
  font-size: 0.9rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1fr;
  gap: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-grid h5 {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.85);
  margin: 0 0 1rem;
}
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 0.6rem; }
.footer-grid a:hover { color: var(--white); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-3);
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-bottom .legal-links { display: flex; gap: var(--space-3); }

/* ===================== Breadcrumb / page header ===================== */
.page-head {
  background: var(--ink);
  color: var(--white);
  padding: var(--space-5) 0 var(--space-4);
  position: relative;
  overflow: hidden;
}
.page-head::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, black, transparent 90%);
}
.page-head h1 {
  color: var(--white);
  font-size: clamp(1.9rem, 3.4vw, 2.7rem);
  margin: var(--space-2) 0 0.7rem;
  max-width: 22ch;
  position: relative;
}
.page-head p { color: rgba(255,255,255,0.65); max-width: 52ch; position: relative; margin: 0; }

/* ===================== Responsive ===================== */
@media (max-width: 900px) {
  nav.main-nav { display: none; }
  nav.main-nav.nav-open {
    display: block;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--ink);
    border-bottom: 1px solid rgba(255,255,255,0.08);
    padding: var(--space-2) var(--space-3) var(--space-3);
  }
  nav.main-nav.nav-open ul { flex-direction: column; gap: 1rem; }
  .nav-toggle { display: block; }
  .hero-grid { grid-template-columns: 1fr; }
  .schematic { order: -1; max-width: 320px; margin: 0 auto var(--space-3); }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .value-row { grid-template-columns: repeat(2, 1fr); }
  .case { grid-template-columns: 1fr; }
  .case-meta { grid-template-columns: 1fr; }
  .job { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}