/* Coordimania — OPC Bâtiment */
:root {
  --charcoal: #2c2c2c;
  --charcoal-deep: #1a1a1a;
  --charcoal-soft: #4a4a4a;
  --gold: #b8956c;
  --gold-light: #d4b896;
  --gold-dark: #9a7a52;
  --cream: #f7f5f2;
  --white: #ffffff;
  --muted: #6b6b6b;
  --border: #e5e1db;
  --shadow: 0 12px 40px rgba(26, 26, 26, 0.08);
  --radius: 12px;
  --font: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --max: 1120px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--charcoal);
  background: var(--white);
  line-height: 1.65;
  font-size: 1.05rem;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--gold-dark); text-decoration: none; transition: color .2s; }
a:hover { color: var(--charcoal); }
ul { list-style: none; }

.container { width: min(100% - 2.5rem, var(--max)); margin-inline: auto; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: .85rem 0;
}

.logo-link {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.logo-link img {
  height: 56px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.6rem;
}

.nav-links a {
  color: var(--charcoal-soft);
  font-size: .92rem;
  font-weight: 500;
  letter-spacing: .01em;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--charcoal-deep);
}

.nav-links a.active {
  position: relative;
}

.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 2px;
  background: var(--gold);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .75rem 1.35rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: .95rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background .2s, color .2s, border-color .2s, transform .15s;
}

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

.btn-primary {
  background: var(--charcoal-deep);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--charcoal);
  color: var(--white);
}

.btn-gold {
  background: var(--gold);
  color: var(--white);
}

.btn-gold:hover {
  background: var(--gold-dark);
  color: var(--white);
}

.btn-outline {
  background: transparent;
  border-color: var(--charcoal);
  color: var(--charcoal);
}

.btn-outline:hover {
  background: var(--charcoal);
  color: var(--white);
}

.btn-nav {
  padding: .55rem 1.1rem;
  font-size: .88rem;
}

.nav-links a.btn-primary,
.nav-links a.btn-primary:hover,
.nav-links a.btn-primary.active {
  color: var(--white);
  background: var(--charcoal-deep);
}

.nav-links a.btn-primary:hover {
  background: var(--charcoal);
}

.nav-links a.btn-primary.active::after {
  display: none;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--charcoal);
  transition: transform .2s, opacity .2s;
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Hero */
.hero {
  position: relative;
  padding: 5.5rem 0 4.5rem;
  background:
    linear-gradient(135deg, var(--cream) 0%, #fff 55%, #f0ebe4 100%);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -20%;
  right: -10%;
  width: 55%;
  height: 140%;
  background: radial-gradient(circle, rgba(184,149,108,.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 3rem;
  align-items: center;
  position: relative;
}

.eyebrow {
  display: inline-block;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--gold-dark);
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(2rem, 4.2vw, 3.1rem);
  line-height: 1.15;
  color: var(--charcoal-deep);
  font-weight: 700;
  letter-spacing: -.02em;
  margin-bottom: 1.25rem;
}

.hero h1 span { color: var(--gold-dark); }

.hero-lead {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 34rem;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem;
  margin-bottom: 2.5rem;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.stat strong {
  display: block;
  font-size: 1.55rem;
  color: var(--charcoal-deep);
  font-weight: 700;
}

.stat span {
  font-size: .85rem;
  color: var(--muted);
}

.hero-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2rem;
  box-shadow: var(--shadow);
}

.hero-card h3 {
  font-size: 1.1rem;
  margin-bottom: 1rem;
  color: var(--charcoal-deep);
}

.timeline-mini {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.tl-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .85rem;
  align-items: start;
}

.tl-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--gold);
  margin-top: .4rem;
  box-shadow: 0 0 0 4px rgba(184,149,108,.2);
}

.tl-item strong { display: block; font-size: .95rem; color: var(--charcoal-deep); }
.tl-item span { font-size: .85rem; color: var(--muted); }

/* Sections */
.section { padding: 5rem 0; }
.section-alt { background: var(--cream); }

.section-head {
  max-width: 40rem;
  margin-bottom: 2.75rem;
}

.section-head h2 {
  font-size: clamp(1.7rem, 3vw, 2.25rem);
  color: var(--charcoal-deep);
  letter-spacing: -.02em;
  margin-bottom: .75rem;
}

.section-head p { color: var(--muted); font-size: 1.05rem; }

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: box-shadow .2s, transform .2s;
}

.card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(184,149,108,.15);
  color: var(--gold-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: .85rem;
  letter-spacing: .04em;
  margin-bottom: 1.1rem;
}

.card h3 {
  font-size: 1.15rem;
  color: var(--charcoal-deep);
  margin-bottom: .6rem;
}

.card p { color: var(--muted); font-size: .98rem; }

.card ul {
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: .45rem;
}

.card ul li {
  position: relative;
  padding-left: 1.15rem;
  color: var(--charcoal-soft);
  font-size: .95rem;
}

.card ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .55rem;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold);
}

/* Method steps */
.steps {
  display: grid;
  gap: 0;
  counter-reset: step;
}

.step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 1.5rem;
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--border);
  counter-increment: step;
}

.step:last-child { border-bottom: none; }

.step-num {
  font-size: 2rem;
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
  letter-spacing: -.02em;
}

.step-num::before {
  content: counter(step, decimal-leading-zero);
}

.step h3 {
  font-size: 1.2rem;
  color: var(--charcoal-deep);
  margin-bottom: .4rem;
}

.step p { color: var(--muted); max-width: 42rem; }

/* References placeholders */
.ref-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.ref-card {
  background: var(--white);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  min-height: 200px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.ref-card .tag {
  display: inline-block;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--gold-dark);
  background: rgba(184,149,108,.12);
  padding: .35rem .7rem;
  border-radius: 999px;
  margin-bottom: 1rem;
  width: fit-content;
}

.ref-card h3 {
  font-size: 1.1rem;
  color: var(--charcoal-deep);
  margin-bottom: .5rem;
}

.ref-card p { color: var(--muted); font-size: .95rem; }

.ref-meta {
  margin-top: 1.25rem;
  font-size: .85rem;
  color: var(--charcoal-soft);
  border-top: 1px solid var(--border);
  padding-top: .85rem;
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.about-visual {
  background: var(--charcoal-deep);
  border-radius: 20px;
  padding: 2.5rem;
  color: var(--white);
  min-height: 320px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  position: relative;
  overflow: hidden;
}

.about-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(160deg, transparent 40%, rgba(184,149,108,.25)),
    repeating-linear-gradient(
      -45deg,
      transparent,
      transparent 18px,
      rgba(255,255,255,.03) 18px,
      rgba(255,255,255,.03) 19px
    );
}

.about-visual > * { position: relative; }

.about-visual .eyebrow { color: var(--gold-light); }
.about-visual h3 {
  font-size: 1.6rem;
  margin: .5rem 0 1rem;
  letter-spacing: -.01em;
}
.about-visual p { color: rgba(255,255,255,.75); max-width: 22rem; }

.about-copy h2 { margin-bottom: 1rem; }
.about-copy p { color: var(--muted); margin-bottom: 1rem; }

.values {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1.5rem;
}

.value {
  padding: 1rem 1.1rem;
  background: var(--cream);
  border-radius: 10px;
  border-left: 3px solid var(--gold);
}

.value strong {
  display: block;
  font-size: .95rem;
  color: var(--charcoal-deep);
  margin-bottom: .25rem;
}

.value span { font-size: .85rem; color: var(--muted); }

/* CTA band */
.cta-band {
  background: var(--charcoal-deep);
  color: var(--white);
  padding: 4rem 0;
  text-align: center;
}

.cta-band h2 {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  margin-bottom: .75rem;
  letter-spacing: -.02em;
}

.cta-band p {
  color: rgba(255,255,255,.7);
  max-width: 32rem;
  margin: 0 auto 1.75rem;
}

.cta-band .btn-gold { border: none; }

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 2.5rem;
  align-items: start;
}

.contact-info {
  background: var(--cream);
  border-radius: 16px;
  padding: 2rem;
}

.contact-info h2 {
  font-size: 1.5rem;
  color: var(--charcoal-deep);
  margin-bottom: .75rem;
}

.contact-info > p {
  color: var(--muted);
  margin-bottom: 1.75rem;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

.contact-item strong {
  display: block;
  font-size: .78rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--gold-dark);
  margin-bottom: .25rem;
}

.contact-item a,
.contact-item span {
  color: var(--charcoal-deep);
  font-weight: 500;
}

.contact-item a:hover { color: var(--gold-dark); }

.form-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  box-shadow: var(--shadow);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-group {
  margin-bottom: 1.15rem;
}

.form-group label {
  display: block;
  font-size: .85rem;
  font-weight: 600;
  color: var(--charcoal-soft);
  margin-bottom: .4rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: .8rem 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  font: inherit;
  color: var(--charcoal);
  background: var(--white);
  transition: border-color .2s, box-shadow .2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(184,149,108,.2);
}

.form-group textarea { min-height: 140px; resize: vertical; }

.form-note {
  font-size: .85rem;
  color: var(--muted);
  margin-top: .85rem;
}

.form-success {
  display: none;
  padding: 1rem 1.15rem;
  background: rgba(184,149,108,.12);
  border: 1px solid var(--gold-light);
  border-radius: 10px;
  color: var(--charcoal-deep);
  margin-bottom: 1rem;
}

.form-success.visible { display: block; }

/* Page hero (inner) */
.page-hero {
  padding: 3.5rem 0 2.5rem;
  background: var(--cream);
  border-bottom: 1px solid var(--border);
}

.page-hero h1 {
  font-size: clamp(1.9rem, 3.5vw, 2.6rem);
  color: var(--charcoal-deep);
  letter-spacing: -.02em;
  margin-bottom: .65rem;
}

.page-hero p {
  color: var(--muted);
  max-width: 38rem;
  font-size: 1.08rem;
}

/* Footer */
.site-footer {
  background: var(--charcoal-deep);
  color: rgba(255,255,255,.7);
  padding: 3.5rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

.footer-brand img {
  height: 44px;
  width: auto;
  margin-bottom: 1rem;
  background: #fff;
  padding: .45rem .7rem;
  border-radius: 8px;
}

.footer-brand p {
  font-size: .95rem;
  max-width: 22rem;
  line-height: 1.6;
}

.footer-col h4 {
  color: var(--white);
  font-size: .85rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.footer-col a {
  display: block;
  color: rgba(255,255,255,.65);
  margin-bottom: .55rem;
  font-size: .95rem;
}

.footer-col a:hover { color: var(--gold-light); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: .85rem;
}

.gold-line {
  width: 48px;
  height: 3px;
  background: var(--gold);
  border-radius: 2px;
  margin-bottom: 1.25rem;
}

/* Responsive */
@media (max-width: 900px) {
  .hero-grid,
  .about-grid,
  .contact-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .grid-3,
  .ref-grid {
    grid-template-columns: 1fr;
  }

  .grid-2,
  .values,
  .form-row {
    grid-template-columns: 1fr;
  }

  .menu-toggle { display: flex; }

  .nav-links {
    position: fixed;
    inset: 73px 0 auto 0;
    background: var(--white);
    flex-direction: column;
    align-items: stretch;
    padding: 1.25rem 1.5rem 1.75rem;
    border-bottom: 1px solid var(--border);
    gap: 0;
    display: none;
    box-shadow: var(--shadow);
  }

  .nav-links.open { display: flex; }

  .nav-links a {
    padding: .85rem 0;
    border-bottom: 1px solid var(--border);
  }

  .nav-links .btn-nav {
    margin-top: .75rem;
    text-align: center;
  }

  .nav-links a.active::after { display: none; }

  .hero { padding: 3.5rem 0 3rem; }
  .hero-card { order: -1; }
  .step { grid-template-columns: 60px 1fr; }
}

@media (max-width: 560px) {
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn { width: 100%; }
  .hero-stats { gap: 1.25rem; }
}

/* Hero visuel (accueil) */
.hero.hero-visual{min-height:70vh;display:flex;align-items:center;padding:6rem 0 5rem;background:var(--charcoal-deep) url('../assets/hero-chantier.jpg') center/cover no-repeat;color:#fff}
.hero-visual .hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.hero.hero-visual::before{top:0;right:0;left:0;bottom:0;width:auto;height:auto;z-index:1;background:linear-gradient(90deg,rgba(26,26,26,.78) 0%,rgba(26,26,26,.6) 50%,rgba(26,26,26,.35) 100%)}
.hero-visual .hero-grid{z-index:2;grid-template-columns:1fr;max-width:none}
.hero-visual .hero-grid>div{max-width:40rem}
.hero-visual .eyebrow{color:var(--gold-light)}
.hero-visual h1{color:#fff;text-shadow:0 2px 18px rgba(0,0,0,.35)}
.hero-visual h1 span{color:var(--gold-light)}
.hero-visual .hero-lead{color:var(--cream);opacity:.95}
.hero-visual .hero-stats{border-top-color:rgba(255,255,255,.25)}
.hero-visual .stat strong{color:#fff}
.hero-visual .stat span{color:rgba(247,245,242,.8)}
.btn-outline-light{color:#fff!important;border-color:rgba(255,255,255,.75)!important;background:transparent}
.btn-outline-light:hover{background:#fff;color:var(--charcoal-deep)!important}
.secure-band{background:var(--cream);padding:3rem 0;border-bottom:1px solid var(--border)}
.secure-title{font-size:1.25rem;color:var(--charcoal-deep);margin-bottom:1.5rem;text-align:center}
.secure-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.25rem}
.secure-card{background:#fff;border:1px solid var(--border);border-radius:16px;padding:1.4rem;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:.35rem}
.secure-card strong{color:var(--charcoal-deep)}
.secure-card span{color:var(--muted);font-size:.9rem}
.secure-card .secure-dot{width:10px;height:10px;border-radius:50%;background:var(--gold);margin-bottom:.4rem}
@media (max-width:900px){.secure-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.hero.hero-visual{min-height:55vh;padding:4rem 0 3rem}.secure-grid{grid-template-columns:1fr}}