/* =========================================================
   DHIB FER — Feuille de style principale
   Palette : acier / rouille (matériaux de construction, fer)
   ========================================================= */

:root {
  /* Couleurs */
  --steel-900: #191d21;
  --steel-800: #23282e;
  --steel-700: #313841;
  --steel-500: #5b6570;
  --steel-300: #a3aab1;
  --paper: #ecebe6;
  --paper-dim: #dedcd4;
  --ink: #191d21;
  --ember: #bf5119;
  --ember-dark: #973e12;
  --ember-light: #e08a4c;

  /* Typo */
  --font-display: 'Oswald', 'Arial Narrow', sans-serif;
  --font-body: 'Work Sans', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Rythme */
  --gutter: clamp(20px, 5vw, 64px);
  --radius: 2px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
  -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);
  font-weight: 700;
  line-height: 1.08;
  margin: 0 0 .5em;
  letter-spacing: .2px;
}

p { max-width: 62ch; }

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* Accessibilité : focus visible */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--ember);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ---------- Bouton rivet (motif fer/acier) ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .6em;
  padding: .85em 1.6em;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  border: 2px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color .15s ease, color .15s ease, border-color .15s ease;
}

.btn-primary {
  background: var(--ember);
  color: var(--paper);
}
.btn-primary:hover { background: var(--ember-dark); }

.btn-ghost {
  background: transparent;
  color: var(--paper);
  border-color: var(--steel-500);
}
.btn-ghost:hover { border-color: var(--ember-light); color: var(--ember-light); }

.btn-dark {
  background: var(--steel-900);
  color: var(--paper);
}
.btn-dark:hover { background: var(--ink); }

/* ---------- Header ---------- */
.site-header {
  background: var(--steel-900);
  border-bottom: 4px solid var(--ember);
  position: sticky;
  top: 0;
  z-index: 50;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  padding-bottom: 18px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: .5em;
  color: var(--paper);
  font-family: var(--font-display);
}
.brand-mark {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: .5px;
}
.brand-mark span { color: var(--ember-light); }
.brand-sub {
  font-family: var(--font-body);
  font-size: .72rem;
  color: var(--steel-300);
  display: block;
  font-weight: 500;
  letter-spacing: .3px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 2.1rem;
}
.main-nav a {
  color: var(--steel-300);
  font-weight: 500;
  font-size: .95rem;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: color .15s ease, border-color .15s ease;
}
.main-nav a:hover,
.main-nav a[aria-current="page"] {
  color: var(--paper);
  border-color: var(--ember);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.nav-phone {
  color: var(--paper);
  font-weight: 600;
  font-size: .95rem;
  white-space: nowrap;
}
.nav-phone .num-label { color: var(--steel-300); font-weight: 500; margin-right: .4em; }

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--steel-500);
  color: var(--paper);
  padding: 8px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 1.1rem;
}

/* ---------- Hero ---------- */
.hero {
  background: var(--steel-900);
  color: var(--paper);
  position: relative;
  overflow: hidden;
  padding: clamp(56px, 9vw, 108px) 0 clamp(48px, 7vw, 88px);
}

.hero-grid {
  position: absolute;
  inset: 0;
  opacity: .5;
  background-image:
    repeating-linear-gradient(90deg, rgba(255,255,255,.05) 0 1px, transparent 1px 88px),
    repeating-linear-gradient(0deg, rgba(255,255,255,.05) 0 1px, transparent 1px 88px);
  pointer-events: none;
}

.hero .container {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 48px;
  align-items: end;
}

.hero-eyebrow {
  color: var(--ember-light);
  font-weight: 600;
  font-size: .92rem;
  margin-bottom: .9em;
}

.hero h1 {
  font-size: clamp(2.4rem, 4.6vw, 4.1rem);
  max-width: 13ch;
}
.hero h1 em { font-style: normal; color: var(--ember-light); }

.hero-lead {
  color: var(--steel-300);
  font-size: 1.12rem;
  max-width: 46ch;
  margin: .9em 0 1.7em;
}

.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--steel-700);
  border: 1px solid var(--steel-700);
}
.hero-stat {
  background: var(--steel-900);
  padding: 20px 16px;
}
.hero-stat b {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--ember-light);
}
.hero-stat span {
  color: var(--steel-300);
  font-size: .82rem;
}

/* ---------- Bande contact rapide ---------- */
.quickbar {
  background: var(--ember);
  color: var(--paper);
}
.quickbar .container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 32px;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  padding-bottom: 12px;
  font-size: .92rem;
  font-weight: 500;
}
.quickbar a { border-bottom: 1px solid rgba(255,255,255,.4); }
.quickbar a:hover { border-color: var(--paper); }

/* ---------- Sections génériques ---------- */
section { padding: clamp(52px, 8vw, 96px) 0; }

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  margin-bottom: 2.6rem;
  flex-wrap: wrap;
}
.section-head h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); }
.section-head p { color: var(--steel-500); margin: 0; }

.on-dark { background: var(--steel-900); color: var(--paper); }
.on-dark .section-head p { color: var(--steel-300); }
.on-dark h2, .on-dark h3 { color: var(--paper); }

/* ---------- Grille produits ---------- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--steel-700);
  border: 1px solid var(--steel-700);
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--paper-dim);
  border: 1px solid var(--paper-dim);
}

.card {
  background: var(--paper);
  padding: 2rem;
}
.on-dark .card { background: var(--steel-800); }

.card .tag {
  display: inline-block;
  font-size: .75rem;
  font-weight: 600;
  color: var(--ember);
  border: 1px solid var(--ember);
  padding: .2em .7em;
  border-radius: var(--radius);
  margin-bottom: 1em;
}
.on-dark .card .tag { color: var(--ember-light); border-color: var(--ember-light); }

.card h3 { font-size: 1.25rem; margin-bottom: .4em; }
.card p { color: var(--steel-500); font-size: .96rem; margin-bottom: 0; }
.on-dark .card p { color: var(--steel-300); }

.card ul {
  margin: 1em 0 0;
  padding: 0;
  list-style: none;
  font-size: .93rem;
  color: var(--steel-500);
}
.on-dark .card ul { color: var(--steel-300); }
.card ul li {
  padding-left: 1.3em;
  position: relative;
  margin-bottom: .5em;
}
.card ul li::before {
  content: '';
  position: absolute;
  left: 0; top: .55em;
  width: 7px; height: 7px;
  background: var(--ember);
}

/* ---------- Étapes numérotées (formation) ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}
.step { position: relative; padding-top: 8px; border-top: 3px solid var(--ember); }
.step b {
  font-family: var(--font-display);
  font-size: 2.4rem;
  color: var(--steel-300);
  display: block;
  margin-bottom: .3em;
}
.step h4 { font-size: 1.02rem; margin-bottom: .35em; }
.step p { color: var(--steel-500); font-size: .92rem; }

/* ---------- Bandeau CTA ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--ember-dark), var(--ember));
  color: var(--paper);
  text-align: center;
}
.cta-band h2 { font-size: clamp(1.6rem, 3.4vw, 2.3rem); max-width: 22ch; margin: 0 auto .3em; }
.cta-band p { max-width: 46ch; margin: 0 auto 1.7rem; color: rgba(255,255,255,.88); }
.cta-band .hero-actions { justify-content: center; }
.cta-band .btn-ghost { border-color: rgba(255,255,255,.55); color: var(--paper); }
.cta-band .btn-ghost:hover { border-color: var(--paper); }

/* ---------- Bloc image / motif fer à béton (SVG inline en CSS) ---------- */
.rebar-panel {
  position: relative;
  min-height: 260px;
  background: var(--steel-800);
  border: 1px solid var(--steel-700);
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  padding: 24px;
}
.rebar-panel::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(115deg, rgba(224,138,76,.14) 0 3px, transparent 3px 26px);
}
.rebar-panel span {
  position: relative;
  color: var(--steel-300);
  font-size: .82rem;
  font-weight: 500;
}

/* ---------- Formulaire de contact ---------- */
.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}
.info-list { list-style: none; padding: 0; margin: 1.6em 0 0; }
.info-list li {
  display: flex;
  gap: 14px;
  padding: 14px 0;
  border-top: 1px solid var(--paper-dim);
}
.info-list li:first-child { border-top: none; }
.info-list .ico {
  width: 22px; flex-shrink: 0; color: var(--ember); margin-top: 2px;
}
.info-list b { display: block; font-size: .82rem; color: var(--steel-500); font-weight: 600; }
.info-list a, .info-list span.val { font-size: 1rem; }

form.contact-form { display: grid; gap: 14px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
label { font-size: .85rem; font-weight: 600; color: var(--steel-700); display: block; margin-bottom: 6px; }
input, textarea, select {
  width: 100%;
  font-family: var(--font-body);
  font-size: .97rem;
  padding: .8em .9em;
  border: 1px solid var(--steel-300);
  background: #fff;
  border-radius: var(--radius);
}
textarea { resize: vertical; min-height: 120px; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--steel-900);
  color: var(--steel-300);
  padding: 56px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--steel-700);
}
.footer-grid h4 {
  color: var(--paper);
  font-size: .95rem;
  margin-bottom: 1em;
  font-family: var(--font-body);
  font-weight: 600;
}
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: .6em; font-size: .92rem; }
.footer-grid a:hover { color: var(--paper); }
.footer-brand p { color: var(--steel-300); font-size: .92rem; max-width: 32ch; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: 20px;
  font-size: .82rem;
  color: var(--steel-500);
}

/* ---------- Fil d'Ariane simple pages internes ---------- */
.page-hero {
  background: var(--steel-900);
  color: var(--paper);
  padding: 44px 0;
  border-bottom: 4px solid var(--ember);
}
.page-hero .crumb { color: var(--steel-300); font-size: .85rem; margin-bottom: .6em; }
.page-hero .crumb a:hover { color: var(--ember-light); }
.page-hero h1 { font-size: clamp(2rem, 4vw, 2.9rem); }
.page-hero p { color: var(--steel-300); margin-top: .5em; }

/* ---------- Utilitaires ---------- */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.center { text-align: center; }
.mt-0 { margin-top: 0; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .main-nav { display: none; }
  .menu-toggle { display: inline-flex; align-items: center; gap: 6px; }
  .nav-phone { display: none; }

  .hero .container { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: repeat(3, 1fr); }

  .grid-3, .steps { grid-template-columns: 1fr 1fr; }
  .grid-2, .contact-wrap, .two-col, .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 560px) {
  .grid-3, .steps, .footer-grid { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: 1fr; }
  .quickbar .container { justify-content: flex-start; }
}

/* ---------- Menu mobile ouvert ---------- */
.nav-open .main-nav {
  display: flex;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--steel-900);
  flex-direction: column;
  padding: 8px var(--gutter) 20px;
  border-top: 1px solid var(--steel-700);
  gap: 0;
}
.nav-open .main-nav a { padding: 12px 0; border-bottom: 1px solid var(--steel-700); width: 100%; }