/* =========================================================
   MSE — Modern Steel Engineering
   Palette issue du logo : bleu marine, magenta, noir.
   ========================================================= */

:root {
  --navy: #0b2a66;
  --navy-deep: #0a1a3f;
  --navy-ink: #060f26;
  --magenta: #ff0a9c;
  --magenta-text: #d1007d;   /* magenta lisible sur fond clair */
  --ink: #0c1220;
  --text: #2c3445;
  --muted: #5d677a;
  --line: #dfe3ea;
  --paper: #ffffff;
  --tint: #f3f5f9;
  --on-dark: #e8ecf5;
  --on-dark-muted: #a3aec6;
  --line-dark: rgba(255, 255, 255, .14);

  --font-display: "Barlow Condensed", "Arial Narrow", sans-serif;
  --font-body: "Barlow", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, Consolas, monospace;

  --container: 1200px;
  --gutter: clamp(16px, 4vw, 40px);
  --header-h: 88px;
}

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

html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  color: var(--text);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; display: block; }
img { height: auto; }
a { color: inherit; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, p { margin: 0; }

h1, h2, h3 {
  font-family: var(--font-display);
  color: var(--ink);
  line-height: 1.05;
  text-wrap: balance;
}
h1 { font-size: clamp(2.7rem, 6.2vw, 5rem); font-weight: 700; text-transform: uppercase; letter-spacing: -.005em; }
h2 { font-size: clamp(2rem, 4vw, 3.1rem); font-weight: 700; text-transform: uppercase; }
h3 { font-size: 1.4rem; font-weight: 600; letter-spacing: .01em; }

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

.skip-link {
  position: absolute; left: 16px; top: -60px; z-index: 100;
  background: var(--navy); color: #fff; padding: 10px 16px; text-decoration: none;
}
.skip-link:focus { top: 12px; }

:focus-visible { outline: 3px solid var(--magenta); outline-offset: 3px; }

/* ---------- Éléments communs ---------- */

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: .78rem; font-weight: 500;
  text-transform: uppercase; letter-spacing: .14em;
  color: var(--navy);
  margin-bottom: 18px;
}
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--magenta); flex: none; }

.mono-label {
  font-family: var(--font-mono); font-size: .74rem; text-transform: uppercase;
  letter-spacing: .12em; color: var(--muted);
}

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 52px; padding: 0 28px;
  font-family: var(--font-display); font-size: 1.15rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: .06em; text-decoration: none;
  border: 2px solid transparent; border-radius: 2px; cursor: pointer;
  transition: background .2s, color .2s, border-color .2s, transform .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn-sm { min-height: 42px; padding: 0 18px; font-size: 1rem; }
.btn-primary { background: var(--magenta); color: #fff; text-shadow: 0 1px 0 rgba(0, 0, 0, .25); }
.btn-primary:hover { background: #e0008a; }
.btn-ghost { border-color: var(--line-dark); color: #fff; }
.btn-ghost:hover { border-color: #fff; }

.section { padding-block: clamp(72px, 10vw, 128px); }
.section-tint { background: var(--tint); }
.section-dark { background: var(--navy-deep); color: var(--on-dark); }
.section-dark h2, .section-dark h3 { color: #fff; }
.section-dark .eyebrow { color: var(--on-dark-muted); }
.section-dark .mono-label { color: var(--on-dark-muted); }

.section-head { max-width: 780px; margin-bottom: clamp(40px, 6vw, 72px); }
.section-head h2 + p { margin-top: 20px; font-size: 1.12rem; color: var(--muted); }
.section-dark .section-head h2 + p { color: var(--on-dark-muted); }

/* ---------- En-tête ---------- */

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: #fff; border-bottom: 1px solid var(--line);
  transition: box-shadow .25s;
}
.site-header.scrolled { box-shadow: 0 6px 24px rgba(10, 26, 63, .1); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); gap: 24px; }
.brand img { height: 68px; width: auto; }

.nav { display: flex; align-items: center; gap: clamp(16px, 2.4vw, 34px); }
.nav a:not(.btn) {
  position: relative; padding: 8px 0;
  font-family: var(--font-display); font-size: 1.1rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: .05em; text-decoration: none; color: var(--ink);
}
.nav a:not(.btn)::after {
  content: ""; position: absolute; left: 0; bottom: 2px; height: 2px; width: 100%;
  background: var(--magenta); transform: scaleX(0); transform-origin: left; transition: transform .25s;
}
.nav a:not(.btn):hover::after, .nav a.active::after { transform: scaleX(1); }

.nav-toggle {
  display: none; width: 46px; height: 46px; padding: 12px 10px;
  background: none; border: 1px solid var(--line); border-radius: 2px; cursor: pointer;
  flex-direction: column; justify-content: space-between;
}
.nav-toggle span { display: block; height: 2px; background: var(--ink); transition: transform .25s, opacity .25s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }

/* ---------- Hero ---------- */

.hero {
  position: relative; overflow: hidden;
  background:
    linear-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px) 0 0 / 100% 40px,
    linear-gradient(90deg, rgba(255, 255, 255, .045) 1px, transparent 1px) 0 0 / 40px 100%,
    radial-gradient(120% 90% at 85% 10%, #143a86 0%, var(--navy-deep) 55%, var(--navy-ink) 100%);
  color: var(--on-dark);
}
/* Trait diagonal magenta, rappel du logo */
.hero::before {
  content: ""; position: absolute; top: -20%; right: 46%; width: 3px; height: 150%;
  background: var(--magenta); transform: rotate(28deg); opacity: .5; pointer-events: none;
}
.hero-grid {
  position: relative;
  display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  gap: clamp(24px, 5vw, 72px); align-items: center;
  padding-block: clamp(56px, 9vw, 120px) clamp(40px, 6vw, 72px);
}
.hero .eyebrow { color: var(--on-dark-muted); }
.hero h1 { color: #fff; }
.hero h1 em { font-style: normal; color: var(--magenta); }
.lead { margin-top: 24px; max-width: 56ch; font-size: clamp(1.05rem, 1.5vw, 1.22rem); color: var(--on-dark); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 40px; }
.hero-tags li {
  padding: 6px 12px; border: 1px solid var(--line-dark);
  font-family: var(--font-mono); font-size: .74rem; text-transform: uppercase; letter-spacing: .1em;
  color: var(--on-dark-muted);
}

.hero-figure { position: relative; padding: 0 0 48px 28px; }
.hero-figure::before {
  content: ""; position: absolute; left: 0; top: 28px; right: 28px; bottom: 20px;
  border: 2px solid var(--magenta); pointer-events: none;
}
.hero-figure img { position: relative; object-fit: cover; box-shadow: 0 24px 60px rgba(0, 0, 0, .45); }
.hero-main { width: 100%; aspect-ratio: 1; }
.hero-inset {
  position: absolute !important; left: -8px; bottom: 0; width: 40%; aspect-ratio: 1;
  object-position: 50% 35%; border: 6px solid var(--navy-deep);
}

.hero-strip {
  position: relative;
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line-dark);
}
.hero-strip li {
  display: flex; align-items: baseline; gap: 12px; padding: 22px 16px 26px 0;
  font-family: var(--font-display); font-size: 1.2rem; font-weight: 600; text-transform: uppercase; letter-spacing: .04em; color: #fff;
}
.hero-strip .k { font-family: var(--font-mono); font-size: .78rem; color: var(--magenta); letter-spacing: .1em; }

/* ---------- Cartes expertises ---------- */

.cards { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.card {
  position: relative; padding: 36px 30px 40px;
  border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
  background: #fff; transition: background .25s;
}
.card::before {
  content: ""; position: absolute; left: -1px; top: -1px; width: 0; height: 3px;
  background: var(--magenta); transition: width .35s;
}
.card:hover { background: var(--tint); }
.card:hover::before { width: calc(100% + 2px); }
.icon { width: 46px; height: 46px; fill: none; stroke: var(--navy); stroke-width: 2.2; stroke-linecap: square; margin-bottom: 26px; }
.card h3 { margin-bottom: 10px; text-transform: uppercase; }
.card p { color: var(--muted); font-size: 1rem; }

.process-band {
  display: grid; grid-template-columns: auto 1fr; gap: 18px 32px; align-items: center;
  margin-top: 48px; padding: 30px; background: var(--tint); border-left: 4px solid var(--navy);
}
.process-band h3 { font-size: 1.15rem; text-transform: uppercase; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips li { padding: 7px 14px; background: #fff; border: 1px solid var(--line); font-size: .95rem; }
.chips b { font-family: var(--font-mono); font-weight: 500; color: var(--magenta-text); margin-right: 6px; }

/* ---------- Anticorrosion ---------- */

.anti-grid { display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr); gap: clamp(32px, 6vw, 80px); align-items: start; }

.layers { position: sticky; top: calc(var(--header-h) + 24px); }
.layer-stack { margin-top: 16px; display: grid; gap: 4px; }
.layer-stack li {
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
  padding: 16px 20px; transition: transform .25s;
}
.layer-stack li:hover { transform: translateX(8px); }
.l-name { font-family: var(--font-display); font-size: 1.25rem; font-weight: 600; text-transform: uppercase; letter-spacing: .03em; }
.l-role { font-family: var(--font-mono); font-size: .74rem; letter-spacing: .06em; opacity: .85; }
.l-finish { background: var(--magenta); color: #fff; text-shadow: 0 1px 0 rgba(0, 0, 0, .3); }
.l-inter { background: #2f5fc4; color: #fff; }
.l-primer { background: #9aa6bd; color: var(--navy-ink); }
.l-prep {
  color: #fff; border: 1px dashed rgba(255, 255, 255, .4);
  background: repeating-linear-gradient(135deg, rgba(255, 255, 255, .1) 0 2px, transparent 2px 8px);
}
.l-steel { background: linear-gradient(180deg, #4b556b, #2a3142); color: #fff; padding-block: 26px; }

.anti-list li { display: grid; grid-template-columns: 44px 1fr; gap: 18px; padding: 24px 0; border-top: 1px solid var(--line-dark); }
.anti-list li:last-child { border-bottom: 1px solid var(--line-dark); }
.num {
  display: grid; place-items: center; width: 44px; height: 44px; border: 1px solid var(--magenta);
  font-family: var(--font-mono); font-size: .9rem; color: #fff;
}
.anti-list h3 { text-transform: uppercase; margin-bottom: 6px; }
.anti-list p { color: var(--on-dark-muted); }

.corro {
  margin-top: clamp(56px, 8vw, 96px); padding: clamp(24px, 4vw, 48px);
  background: rgba(255, 255, 255, .04); border: 1px solid var(--line-dark);
}
.corro-head h3 { font-size: 1.8rem; text-transform: uppercase; }
.corro-head p { margin-top: 8px; color: var(--on-dark-muted); }
.corro-tabs { display: grid; grid-template-columns: repeat(6, 1fr); gap: 6px; margin-top: 28px; }
.corro-tabs button {
  min-height: 52px; background: transparent; color: #fff; border: 1px solid var(--line-dark); cursor: pointer;
  font-family: var(--font-display); font-size: 1.3rem; font-weight: 600; letter-spacing: .05em;
  transition: background .2s, border-color .2s;
}
.corro-tabs button:hover { border-color: #fff; }
.corro-tabs button[aria-selected="true"] { background: var(--magenta); border-color: var(--magenta); text-shadow: 0 1px 0 rgba(0, 0, 0, .3); }
.corro-panel { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 2fr); gap: clamp(24px, 4vw, 56px); margin-top: 32px; }
.corro-code { display: block; font-family: var(--font-display); font-size: clamp(4rem, 9vw, 6.5rem); font-weight: 700; line-height: .9; color: #fff; }
.corro-name { display: block; margin-top: 10px; font-family: var(--font-mono); font-size: .8rem; text-transform: uppercase; letter-spacing: .12em; color: var(--on-dark-muted); }
.corro-meter { margin-top: 18px; height: 6px; background: rgba(255, 255, 255, .14); }
.corro-meter i { display: block; height: 100%; width: 66%; background: var(--magenta); transition: width .45s cubic-bezier(.6, 0, .2, 1); }
.corro-details { margin: 0; display: grid; gap: 22px; }
.corro-details dt { font-family: var(--font-mono); font-size: .74rem; text-transform: uppercase; letter-spacing: .12em; color: var(--on-dark-muted); margin-bottom: 6px; }
.corro-details dd { margin: 0; color: var(--on-dark); }
.corro-note { margin-top: 28px; padding-top: 18px; border-top: 1px solid var(--line-dark); font-size: .9rem; color: var(--on-dark-muted); }

/* ---------- Qui sommes-nous ---------- */

.about-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: clamp(32px, 6vw, 80px); align-items: start; }
.about-text { margin-top: 22px; font-size: 1.1rem; }
.mission {
  margin: 32px 0 0; padding: 22px 26px; border-left: 4px solid var(--magenta); background: var(--tint);
  font-size: 1.08rem; color: var(--ink);
}
.mission .mono-label { display: block; margin-bottom: 8px; }
.facts { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.facts li { padding: 26px 22px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.facts b { display: block; font-family: var(--font-display); font-size: clamp(1.7rem, 3vw, 2.4rem); font-weight: 700; line-height: 1; color: var(--navy); }
.facts span { display: block; margin-top: 10px; font-size: .95rem; color: var(--muted); }

/* ---------- Réalisations ---------- */

.clients { display: grid; grid-template-columns: repeat(5, 1fr); border: 1px solid var(--line); margin-bottom: clamp(36px, 5vw, 56px); }
.clients li { padding: 20px 22px; border-right: 1px solid var(--line); }
.clients li:last-child { border-right: 0; }
.clients b { display: block; font-family: var(--font-display); font-size: 1.5rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: var(--navy); line-height: 1.1; }
.clients span { font-family: var(--font-mono); font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }

.projects { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.project { display: flex; flex-direction: column; background: #fff; border: 1px solid var(--line); transition: transform .25s, box-shadow .25s; }
.project:hover { transform: translateY(-4px); box-shadow: 0 16px 36px rgba(10, 26, 63, .12); }
.project img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.project-body { display: flex; flex-direction: column; flex: 1; padding: 22px 24px 24px; }
.project-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 8px; font-family: var(--font-mono); font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.tag { padding: 3px 8px; background: var(--navy); color: #fff; }
.tag-alt { background: var(--magenta-text); }
.project h3 { margin: 14px 0 8px; text-transform: uppercase; }
.project-body > p:not(.project-meta) { color: var(--muted); font-size: 1rem; padding-bottom: 18px; }
.specs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: auto 0 0; }
.specs div { padding-top: 12px; border-top: 2px solid var(--ink); }
.specs dt { font-family: var(--font-mono); font-size: .66rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.specs dd { margin: 2px 0 0; font-family: var(--font-display); font-size: 1.25rem; font-weight: 600; color: var(--ink); white-space: nowrap; }

.more-refs { margin-top: 40px; padding: 30px; background: var(--tint); border-left: 4px solid var(--navy); }
.more-refs h3 { text-transform: uppercase; margin-bottom: 16px; }
.more-refs ul { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 40px; }
.more-refs li { padding-left: 18px; position: relative; font-size: 1rem; }
.more-refs li::before { content: ""; position: absolute; left: 0; top: .6em; width: 8px; height: 8px; border-radius: 50%; background: var(--magenta); }
.more-refs b { color: var(--navy); }

/* ---------- Moyens ---------- */

.equip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.equip li { background: #fff; border: 1px solid var(--line); }
.equip img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; }
.equip div { padding: 20px 22px 24px; }
.equip h3 { text-transform: uppercase; margin-bottom: 6px; }
.equip p { color: var(--muted); font-size: 1rem; }
.equip-wide { grid-column: span 2; display: grid; grid-template-columns: 1.5fr 1fr; align-items: center; }
.equip-wide img { height: 100%; aspect-ratio: auto; }
.equip-wide h3 { font-size: 1.8rem; }

/* ---------- Méthode ---------- */

.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; counter-reset: s; }
.steps li { position: relative; padding: 28px 24px 0 0; border-top: 2px solid var(--ink); }
.steps li::before {
  content: ""; position: absolute; top: -8px; left: 0; width: 14px; height: 14px; border-radius: 50%; background: var(--navy);
}
.steps li:nth-child(4)::before { background: var(--magenta); }
.step-n { font-family: var(--font-mono); font-size: .8rem; letter-spacing: .12em; color: var(--magenta-text); }
.steps h3 { margin: 8px 0 8px; text-transform: uppercase; }
.steps p { color: var(--muted); font-size: 1rem; }

.commit { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: clamp(56px, 8vw, 96px); }
.commit-item { padding: 26px 24px; background: var(--tint); border-top: 3px solid var(--navy); }
.commit-item h3 { text-transform: uppercase; margin-bottom: 8px; }
.commit-item p { color: var(--muted); font-size: 1rem; }

/* ---------- Secteurs ---------- */

.sectors { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.sectors li {
  position: relative; overflow: hidden; padding: 32px 28px 34px; background: #fff; border: 1px solid var(--line);
  transition: transform .25s, box-shadow .25s;
}
.sectors li::after {
  content: ""; position: absolute; right: -30px; top: -30px; width: 2px; height: 160px;
  background: var(--magenta); transform: rotate(-32deg); transform-origin: top; opacity: .6;
}
.sectors li:hover { transform: translateY(-4px); box-shadow: 0 16px 36px rgba(10, 26, 63, .1); }
.sectors span { font-family: var(--font-mono); font-size: .8rem; letter-spacing: .12em; color: var(--muted); }
.sectors h3 { margin: 14px 0 8px; text-transform: uppercase; color: var(--navy); }
.sectors p { color: var(--muted); font-size: 1rem; }

/* ---------- Contact ---------- */

.contact-grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(32px, 6vw, 80px); align-items: start; }
.contact-info h2 + p { margin-top: 20px; color: var(--on-dark-muted); font-size: 1.1rem; }
.contact-list { margin-top: 36px; }
.contact-list li { display: grid; grid-template-columns: 130px 1fr; gap: 16px; align-items: baseline; padding: 16px 0; border-top: 1px solid var(--line-dark); overflow-wrap: anywhere; }
.contact-list a { color: #fff; text-decoration-color: var(--magenta); text-underline-offset: 4px; }

.form { background: #fff; color: var(--text); padding: clamp(24px, 4vw, 44px); border-top: 4px solid var(--magenta); display: grid; gap: 18px; }
.section-dark .form h3 { color: var(--ink); font-size: 1.7rem; text-transform: uppercase; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form label { display: grid; gap: 6px; font-size: .9rem; font-weight: 600; color: var(--ink); }
.form input, .form select, .form textarea {
  width: 100%; padding: 12px 14px; font: inherit; font-weight: 400; font-size: 1rem; color: var(--ink);
  background: var(--tint); border: 1px solid var(--line); border-radius: 2px;
}
.form textarea { resize: vertical; }
.form input:focus, .form select:focus, .form textarea:focus { outline: none; border-color: var(--navy); box-shadow: 0 0 0 3px rgba(11, 42, 102, .15); background: #fff; }
.form .invalid { border-color: var(--magenta-text); }
.form .btn { justify-self: start; }
.form-status { font-size: .95rem; color: var(--magenta-text); min-height: 1.5em; }
.form-status.ok { color: #12703c; }

/* ---------- Pied de page ---------- */

.site-footer { background: #fff; border-top: 1px solid var(--line); padding-block: 44px 28px; }
.footer-inner { display: grid; grid-template-columns: 1fr auto; gap: 28px 40px; align-items: center; }
.footer-brand img { height: 64px; width: auto; }
.footer-brand p { margin-top: 10px; color: var(--muted); font-size: .95rem; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 10px 26px; }
.footer-nav a { font-family: var(--font-display); font-size: 1.05rem; font-weight: 600; text-transform: uppercase; letter-spacing: .05em; text-decoration: none; color: var(--ink); }
.footer-nav a:hover { color: var(--magenta-text); }
.copyright { grid-column: 1 / -1; padding-top: 22px; border-top: 1px solid var(--line); font-size: .88rem; color: var(--muted); }

/* ---------- Apparition au défilement ---------- */

.js .reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */

@media (max-width: 1000px) {
  .cards, .sectors, .projects, .equip { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; }
  .clients { grid-template-columns: repeat(3, 1fr); }
  .clients li { border-bottom: 1px solid var(--line); }
  .steps { grid-template-columns: repeat(2, 1fr); gap: 36px 0; }
  .commit { grid-template-columns: repeat(2, 1fr); }
  .anti-grid, .contact-grid { grid-template-columns: 1fr; }
  .layers { position: static; }
}

@media (max-width: 860px) {
  :root { --header-h: 66px; }
  .brand img { height: 44px; }
  .nav-toggle { display: flex; }
  .nav {
    position: absolute; top: var(--header-h); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    padding: 8px var(--gutter) 20px; background: #fff; border-bottom: 1px solid var(--line);
    box-shadow: 0 20px 30px rgba(10, 26, 63, .12);
    display: none;
  }
  .nav.open { display: flex; }
  .nav a:not(.btn) { padding: 14px 0; border-bottom: 1px solid var(--line); }
  .nav a:not(.btn)::after { display: none; }
  .nav .btn { margin-top: 16px; }

  .hero-grid { grid-template-columns: 1fr; }
  .hero-figure { max-width: 460px; }
  .more-refs ul { grid-template-columns: 1fr; }
  .hero::before { right: 12%; opacity: .3; }
  .hero-strip { grid-template-columns: repeat(2, 1fr); }
  .hero-strip li { padding: 16px 8px 16px 0; font-size: 1.05rem; }
  .process-band { grid-template-columns: 1fr; gap: 12px; }
  .process-band h3:nth-of-type(2) { margin-top: 12px; }
  .corro-panel { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  body { font-size: 16px; }
  .cards, .sectors, .steps, .commit, .field-row, .projects, .equip { grid-template-columns: 1fr; }
  .equip-wide { grid-column: auto; display: block; }
  .clients { grid-template-columns: 1fr 1fr; }
  .corro-tabs { grid-template-columns: repeat(3, 1fr); }
  .hero-actions .btn { width: 100%; }
  .contact-list li { grid-template-columns: 1fr; gap: 2px; }
  .form .btn { justify-self: stretch; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .js .reveal { opacity: 1; transform: none; }
}