:root {
  --navy: #0f2a44;
  --navy-2: #163a5c;
  --orange: #f28c28;
  --orange-dark: #d9741a;
  --ink: #1c2530;
  --muted: #5b6673;
  --line: #e3e7ec;
  --bg-alt: #f4f6f8;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(15, 42, 68, .08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  margin: 0;
  font-family: Inter, system-ui, sans-serif;
  color: var(--ink);
  background: #fff;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3 { font-family: Manrope, Inter, sans-serif; line-height: 1.15; margin: 0 0 .5em; }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.4rem); color: var(--navy); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1em; }

.container { width: min(1160px, 100% - 32px); margin-inline: auto; }

.eyebrow {
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .8rem;
  font-weight: 600;
  color: var(--orange-dark);
  margin-bottom: .6em;
}

.btn {
  display: inline-block;
  background: var(--orange);
  color: #fff;
  border: 2px solid var(--orange);
  padding: .8em 1.5em;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  font: inherit;
  font-weight: 600;
  transition: background .2s, border-color .2s, transform .2s;
}
.btn:hover { background: var(--orange-dark); border-color: var(--orange-dark); transform: translateY(-1px); }
.btn-ghost { background: transparent; border-color: rgba(255,255,255,.8); }
.btn-ghost:hover { background: rgba(255,255,255,.12); border-color: #fff; }
.btn-small { padding: .5em 1.1em; font-size: .9rem; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.logo {
  display: inline-flex; align-items: center; gap: .55em;
  font-family: Manrope, sans-serif; font-weight: 800; font-size: 1.3rem;
  letter-spacing: .06em; color: var(--navy); text-decoration: none;
}
.logo-mark {
  width: 22px; height: 22px; border-radius: 5px;
  background: linear-gradient(135deg, var(--orange) 50%, var(--navy) 50%);
}
.logo-light { color: #fff; }
.logo-light .logo-mark { background: linear-gradient(135deg, var(--orange) 50%, #fff 50%); }
.nav { display: flex; align-items: center; gap: 1.6rem; }
.nav a:not(.btn) { text-decoration: none; font-weight: 500; color: var(--ink); }
.nav a:not(.btn):hover { color: var(--orange-dark); }
.nav-toggle { display: none; background: none; border: 0; padding: 8px; cursor: pointer; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--navy); margin: 5px 0; transition: .25s; }

/* Hero */
.hero { position: relative; color: #fff; min-height: min(88vh, 760px); display: flex; align-items: center; overflow: hidden; background: var(--navy); }
.hero-bg {
  position: absolute; inset: 0;
  background:
    linear-gradient(100deg, rgba(10,28,46,.92) 0%, rgba(10,28,46,.72) 50%, rgba(10,28,46,.35) 100%),
    url("img/chantier-ingedex.jpg") center 35% / cover;
}
.hero-content { position: relative; padding: 96px 0; max-width: 760px; margin-left: max(16px, (100% - 1160px) / 2); }
.hero h1 { font-size: clamp(2.2rem, 6vw, 4rem); font-weight: 800; }
.hero .eyebrow { color: var(--orange); }
.hero-lead { font-size: 1.15rem; color: rgba(255,255,255,.88); max-width: 600px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 1.8rem; }

/* Stats */
.stats { background: var(--navy-2); color: #fff; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: 28px 16px; text-align: center; border-left: 1px solid rgba(255,255,255,.12); }
.stat:first-child { border-left: 0; }
.stat strong { display: block; font-family: Manrope, sans-serif; font-size: 2rem; color: var(--orange); }
.stat span { font-size: .92rem; color: rgba(255,255,255,.8); }

/* Sections */
.section { padding: clamp(64px, 9vw, 112px) 0; }
.section-alt { background: var(--bg-alt); }
.section-head { max-width: 680px; margin-bottom: 48px; }
.section-head p:last-child { color: var(--muted); }
.placeholder-note { display: inline-block; background: #fff4e8; color: #8a4a0c !important; padding: .4em .9em; border-radius: 8px; font-size: .92rem; }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px 28px; box-shadow: var(--shadow); border-top: 4px solid var(--orange);
}
.card p { color: var(--muted); }
.card ul { margin: 0; padding-left: 1.1em; }
.card li { margin: .3em 0; }
.card li::marker { color: var(--orange); }
.card-icon {
  width: 52px; height: 52px; border-radius: 12px; background: #eef3f8;
  display: grid; place-items: center; margin-bottom: 18px;
}
.card-icon svg { width: 28px; height: 28px; fill: none; stroke: var(--navy); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.cards-4 { grid-template-columns: repeat(2, 1fr); }
.offers { list-style: none; padding: 0 !important; }
.offers li { padding: 12px 0; border-top: 1px solid var(--line); margin: 0 !important; color: var(--muted); font-size: .95rem; }
.offers li:first-child { border-top: 0; padding-top: 0; }
.offers strong { display: block; color: var(--ink); font-weight: 600; margin-bottom: 2px; }

/* References */
.refs { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.ref { background: #fff; border: 1px solid var(--line); border-left: 4px solid var(--orange); border-radius: 10px; padding: 18px 20px; }
.ref[hidden] { display: none; }
.ref h3 { margin: .6em 0 .25em; color: var(--navy); font-size: 1.08rem; }
.ref p { margin: 0; color: var(--muted); font-size: .93rem; }

/* Gallery */
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.gallery figure { margin: 0; position: relative; border-radius: var(--radius); overflow: hidden; background: #dde3ea; }
.gallery img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; transition: transform .4s; }
.gallery figure:hover img { transform: scale(1.04); }
.gallery figcaption {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 28px 16px 12px;
  color: #fff; font-weight: 600; font-size: .95rem;
  background: linear-gradient(transparent, rgba(10,28,46,.85));
}

/* Steps */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.steps li { background: #fff; border-radius: var(--radius); padding: 26px 22px; border: 1px solid var(--line); }
.steps span { font-family: Manrope, sans-serif; font-weight: 800; font-size: 1.6rem; color: var(--orange); }
.steps h3 { margin-top: .4em; color: var(--navy); }
.steps p { color: var(--muted); font-size: .95rem; margin: 0; }

/* Projects */
.filters { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.filter {
  font: inherit; font-weight: 500; padding: .5em 1.1em; border-radius: 999px;
  border: 1px solid var(--line); background: #fff; cursor: pointer; color: var(--ink);
}
.filter:hover { border-color: var(--navy); }
.filter.is-active { background: var(--navy); border-color: var(--navy); color: #fff; }
.projects { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.project { border-radius: var(--radius); overflow: hidden; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); }
.project[hidden] { display: none; }
.project img { aspect-ratio: 4 / 3; object-fit: cover; width: 100%; background: #dde3ea; transition: transform .4s; }
.project:hover img { transform: scale(1.04); }
.project-body { padding: 18px 20px 20px; position: relative; background: #fff; }
.project-body h3 { margin: .5em 0 .2em; color: var(--navy); }
.project-body p { color: var(--muted); margin: 0; font-size: .92rem; }
.tag { font-size: .78rem; font-weight: 600; color: var(--orange-dark); background: #fff4e8; padding: .25em .7em; border-radius: 999px; }

/* About */
.section-dark { background: var(--navy); color: rgba(255,255,255,.88); }
.section-dark h2 { color: #fff; }
.section-dark .eyebrow { color: var(--orange); }
.about { display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px; align-items: center; }
.values { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.values li { background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12); border-radius: var(--radius); padding: 22px; }
.values strong { display: block; color: #fff; font-family: Manrope, sans-serif; font-size: 1.1rem; margin-bottom: .3em; }
.values strong::before { content: ""; display: inline-block; width: 10px; height: 10px; background: var(--orange); border-radius: 2px; margin-right: 10px; }
.values span { font-size: .93rem; }

/* Contact */
.contact { display: grid; grid-template-columns: 1fr 1.3fr; gap: 56px; }
.contact-info dl { margin: 28px 0 0; display: grid; gap: 16px; }
.contact-info dt { font-weight: 600; color: var(--navy); font-size: .9rem; }
.contact-info dd { margin: 0; color: var(--muted); }
.contact-form {
  background: var(--bg-alt); border-radius: var(--radius); padding: 32px;
  display: grid; gap: 16px;
}
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.contact-form label { display: grid; gap: 6px; font-weight: 500; font-size: .92rem; color: var(--navy); }
.contact-form input, .contact-form select, .contact-form textarea {
  font: inherit; padding: .75em .9em; border: 1px solid #cfd6de; border-radius: 10px; background: #fff; color: var(--ink); width: 100%;
}
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { outline: 2px solid var(--orange); outline-offset: 1px; border-color: transparent; }
.contact-form .btn { justify-self: start; }
.hp { position: absolute; left: -9999px; }
.form-status { margin: 0; font-weight: 500; }
.form-status.ok { color: #1d7a3e; }
.form-status.err { color: #b3261e; }

/* Footer */
.site-footer { background: #0a1c2e; color: rgba(255,255,255,.7); padding: 48px 0 24px; }
.footer-inner { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; align-items: start; }
.footer-inner p { margin: .8em 0 0; }
.footer-nav { display: grid; gap: 8px; }
.footer-nav a { text-decoration: none; }
.footer-nav a:hover { color: var(--orange); }
.copyright { text-align: center; font-size: .85rem; margin: 40px 0 0; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.1); }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* Responsive */
@media (max-width: 1000px) {
  .steps { grid-template-columns: repeat(2, 1fr); }
  .cards, .projects, .gallery { grid-template-columns: repeat(2, 1fr); }
  .cards-4, .refs { grid-template-columns: 1fr; }
  .about, .contact { grid-template-columns: 1fr; gap: 40px; }
}
@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .nav {
    position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: #fff; border-bottom: 1px solid var(--line);
    padding: 8px 16px 16px; display: none;
  }
  .nav.is-open { display: flex; }
  .nav a:not(.btn) { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .nav .btn { margin-top: 12px; text-align: center; }
  .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); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3) { border-left: 0; }
  .stat:nth-child(n+3) { border-top: 1px solid rgba(255,255,255,.12); }
  .cards, .projects, .steps, .values, .field-row, .gallery { grid-template-columns: 1fr; }
  .stat strong { font-size: 1.5rem; }
  .footer-inner { grid-template-columns: 1fr; }
  .contact-form { padding: 22px; }
  .hero-content { padding: 72px 0; }
}