/* ============================================================
   Métallerie-serrurerie — template vitrine ATOM Studios
   Palette acier sombre (charbon/anthracite) + accent teal
   ============================================================ */

:root {
  --charbon: #0d1014;
  --anthracite: #12161b;
  --acier: #1b1f24;
  --acier-2: #232a31;
  --ligne: #2a3138;
  --texte: #e7ebef;
  --texte-doux: #a4afb8;
  --texte-faible: #76828c;
  --teal: #26a69a;
  --teal-clair: #3dd7c9;
  --teal-sombre: #1a9c8f;
  --cuivre: #c9824f;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  --maxw: 1160px;
  --t: 0.25s ease;
  --font: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--texte);
  background: var(--charbon);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 clamp(1.1rem, 4vw, 2.2rem);
}

h1, h2, h3 { line-height: 1.18; letter-spacing: -0.01em; font-weight: 800; }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); }
h3 { font-size: 1.18rem; }

/* ---------- Boutons ---------- */
.btn {
  --pad-y: 0.85rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: var(--pad-y) 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.98rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--t), background var(--t), border-color var(--t), box-shadow var(--t);
  white-space: nowrap;
}
.btn-sm { --pad-y: 0.6rem; padding: 0.6rem 1.1rem; font-size: 0.9rem; }
.btn-block { width: 100%; }
.btn-primary {
  background: linear-gradient(135deg, var(--teal-clair), var(--teal-sombre));
  color: #06201d;
  box-shadow: 0 10px 26px rgba(38, 166, 154, 0.32);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 32px rgba(38, 166, 154, 0.45); }
.btn-ghost {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--ligne);
  color: var(--texte);
}
.btn-ghost:hover { border-color: var(--teal); color: var(--teal-clair); transform: translateY(-2px); }

/* lien téléphone (style "bouton-tel") */
.btn-tel {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 700;
  color: var(--teal-clair);
  padding: 0.55rem 0.9rem;
  border: 1px solid var(--ligne);
  border-radius: var(--radius-sm);
  transition: border-color var(--t), color var(--t), background var(--t);
}
.btn-tel::before {
  content: "";
  width: 16px; height: 16px;
  background: currentColor;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M5 4h4l2 5-3 2a12 12 0 005 5l2-3 5 2v4a2 2 0 01-2 2A16 16 0 013 6a2 2 0 012-2z' fill='black'/%3E%3C/svg%3E") center/contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M5 4h4l2 5-3 2a12 12 0 005 5l2-3 5 2v4a2 2 0 01-2 2A16 16 0 013 6a2 2 0 012-2z' fill='black'/%3E%3C/svg%3E") center/contain no-repeat;
  flex: none;
}
.btn-tel:hover { border-color: var(--teal); background: rgba(38, 166, 154, 0.08); }
.btn.btn-tel::before { display: none; }

/* ---------- Eyebrow ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--teal-clair);
  margin-bottom: 0.9rem;
}
.eyebrow-dot {
  width: 22px; height: 2px;
  background: linear-gradient(90deg, var(--teal-clair), transparent);
  border-radius: 2px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(13, 16, 20, 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--ligne);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  height: 70px;
}
.logo { display: flex; align-items: center; gap: 0.6rem; font-weight: 800; }
.logo-mark { display: flex; }
.logo-text { font-size: 1.12rem; letter-spacing: -0.01em; }
.nav {
  display: flex;
  gap: 1.6rem;
  margin-left: auto;
  font-weight: 600;
  font-size: 0.96rem;
}
.nav a { color: var(--texte-doux); transition: color var(--t); position: relative; }
.nav a:hover { color: var(--texte); }
.nav a::after {
  content: ""; position: absolute; left: 0; bottom: -6px;
  width: 0; height: 2px; background: var(--teal); transition: width var(--t);
}
.nav a:hover::after { width: 100%; }
.header-cta { display: flex; align-items: center; gap: 0.7rem; }

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  padding: 8px;
  cursor: pointer;
  margin-left: auto;
}
.burger span {
  width: 24px; height: 2px; background: var(--texte); border-radius: 2px;
  transition: transform var(--t), opacity var(--t);
}
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: clamp(3.5rem, 9vw, 7rem) 0 clamp(3rem, 7vw, 5.5rem);
  background:
    radial-gradient(120% 90% at 80% -10%, rgba(38, 166, 154, 0.16), transparent 55%),
    linear-gradient(180deg, var(--anthracite), var(--charbon));
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-pattern { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.9; }
.hero-glow {
  position: absolute;
  width: 460px; height: 460px;
  right: -90px; top: -120px;
  background: radial-gradient(circle, rgba(38, 166, 154, 0.28), transparent 70%);
  filter: blur(10px);
}
.hero-inner { position: relative; z-index: 1; max-width: 720px; }
.hero h1 { margin-bottom: 1.1rem; }
.hero-tagline {
  display: block;
  font-size: clamp(2rem, 5.4vw, 3.4rem);
  background: linear-gradient(120deg, #ffffff 30%, var(--teal-clair));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-tagline:empty { display: none; }
.hero-sub {
  display: block;
  font-size: clamp(1.1rem, 2.4vw, 1.5rem);
  color: var(--texte-doux);
  font-weight: 600;
  margin-top: 0.35rem;
}
.hero-lede { color: var(--texte-doux); max-width: 560px; font-size: 1.06rem; margin-bottom: 1.8rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-bottom: 2rem; }
.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem;
  list-style: none;
  color: var(--texte-doux);
  font-size: 0.92rem;
  font-weight: 600;
}
.hero-trust li { display: flex; align-items: center; gap: 0.5rem; }
.hero-trust svg { color: var(--teal-clair); flex: none; }

/* ---------- Trustbar ---------- */
.trustbar { background: var(--acier); border-block: 1px solid var(--ligne); }
.trustbar-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.2rem;
  padding: 1.6rem 0;
}
.trust-item { display: flex; flex-direction: column; gap: 0.15rem; padding-left: 1rem; border-left: 2px solid var(--teal); }
.trust-item strong { font-size: 1rem; }
.trust-item span { color: var(--texte-faible); font-size: 0.86rem; }

/* ---------- Sections ---------- */
.section { padding: clamp(3.5rem, 8vw, 6rem) 0; }
.section-alt { background: var(--anthracite); border-block: 1px solid var(--ligne); }
.section-head { max-width: 640px; margin-bottom: 2.6rem; }
.section-lede { color: var(--texte-doux); margin-top: 0.7rem; font-size: 1.04rem; }

/* ---------- Cartes services ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.3rem;
}
.card {
  position: relative;
  background: linear-gradient(180deg, var(--acier), var(--anthracite));
  border: 1px solid var(--ligne);
  border-radius: var(--radius);
  padding: 1.8rem 1.6rem;
  transition: transform var(--t), border-color var(--t), box-shadow var(--t);
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute; inset: 0 0 auto 0; height: 3px;
  background: linear-gradient(90deg, var(--teal-clair), transparent);
  transform: scaleX(0); transform-origin: left; transition: transform var(--t);
}
.card:hover { transform: translateY(-5px); border-color: rgba(38, 166, 154, 0.5); box-shadow: var(--shadow); }
.card:hover::before { transform: scaleX(1); }
.card-icon {
  display: inline-flex;
  padding: 0.7rem;
  border-radius: 12px;
  background: rgba(38, 166, 154, 0.1);
  border: 1px solid rgba(38, 166, 154, 0.22);
  margin-bottom: 1.1rem;
}
.card h3 { margin-bottom: 0.5rem; }
.card p { color: var(--texte-doux); font-size: 0.96rem; }

/* ---------- Pourquoi ---------- */
.why-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: clamp(2rem, 5vw, 4rem); align-items: start; }
.why-intro .btn { margin-top: 1.4rem; }
.why-list { list-style: none; display: grid; gap: 1.2rem; }
.why-list li {
  display: flex;
  gap: 1rem;
  background: var(--acier);
  border: 1px solid var(--ligne);
  border-radius: var(--radius);
  padding: 1.3rem 1.4rem;
  transition: border-color var(--t), transform var(--t);
}
.why-list li:hover { border-color: rgba(38, 166, 154, 0.4); transform: translateX(4px); }
.why-ico {
  flex: none;
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: rgba(38, 166, 154, 0.12);
  color: var(--teal-clair);
}
.why-list h3 { margin-bottom: 0.25rem; }
.why-list p { color: var(--texte-doux); font-size: 0.94rem; }

/* ---------- Zone ---------- */
.zone-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.zone-addr { display: flex; align-items: center; gap: 0.55rem; margin-top: 1.3rem; color: var(--texte-doux); font-weight: 600; }
.zone-addr svg { color: var(--teal-clair); flex: none; }
.zone-map {
  border: 1px solid var(--ligne);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 0.95fr 1.05fr; gap: clamp(2rem, 5vw, 4rem); align-items: start; }
.contact-list { list-style: none; display: grid; gap: 1rem; margin-top: 1.6rem; }
.contact-list li { display: flex; align-items: center; gap: 0.75rem; color: var(--texte-doux); }
.ci {
  flex: none;
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 10px;
  background: var(--acier);
  border: 1px solid var(--ligne);
  color: var(--teal-clair);
}
.contact-form {
  background: var(--acier);
  border: 1px solid var(--ligne);
  border-radius: var(--radius);
  padding: clamp(1.4rem, 3vw, 2.1rem);
  box-shadow: var(--shadow);
}
.field { margin-bottom: 1rem; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.field label { display: block; font-size: 0.86rem; font-weight: 600; margin-bottom: 0.4rem; color: var(--texte-doux); }
.field input, .field select, .field textarea {
  width: 100%;
  background: var(--charbon);
  border: 1px solid var(--ligne);
  border-radius: var(--radius-sm);
  color: var(--texte);
  padding: 0.75rem 0.9rem;
  font: inherit;
  transition: border-color var(--t), box-shadow var(--t);
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(38, 166, 154, 0.18);
}
.field textarea { resize: vertical; }
.form-success {
  margin-top: 1rem;
  background: rgba(38, 166, 154, 0.12);
  border: 1px solid rgba(38, 166, 154, 0.45);
  color: var(--teal-clair);
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

/* ---------- Footer ---------- */
.site-footer { background: var(--anthracite); border-top: 1px solid var(--ligne); padding-top: 2.6rem; }
.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 1.6rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--ligne);
}
.footer-brand p { color: var(--texte-faible); font-size: 0.92rem; margin-top: 0.5rem; max-width: 320px; }
.footer-nav { display: grid; gap: 0.6rem; align-content: start; }
.footer-nav a { color: var(--texte-doux); font-size: 0.94rem; transition: color var(--t); }
.footer-nav a:hover { color: var(--teal-clair); }
.footer-contact { display: grid; gap: 0.7rem; align-content: start; color: var(--texte-doux); font-size: 0.94rem; }
.footer-contact .btn-tel { justify-self: start; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.6rem;
  padding: 1.2rem 0 1.6rem;
  color: var(--texte-faible);
  font-size: 0.85rem;
}
.footer-credit { color: var(--texte-faible); opacity: 0.85; }

/* ---------- Reveal ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.55s ease, transform 0.55s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .nav {
    position: fixed;
    inset: 70px 0 auto 0;
    flex-direction: column;
    gap: 0;
    background: var(--anthracite);
    border-bottom: 1px solid var(--ligne);
    padding: 0.5rem 0;
    transform: translateY(-130%);
    transition: transform 0.3s ease;
    margin-left: 0;
  }
  .nav.open { transform: translateY(0); }
  .nav a { padding: 0.9rem clamp(1.1rem, 4vw, 2.2rem); }
  .nav a::after { display: none; }
  .burger { display: flex; }
  .header-cta { display: none; }
  .why-grid, .zone-grid, .contact-grid { grid-template-columns: 1fr; }
  .trustbar-inner { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .field-row { grid-template-columns: 1fr; }
  .trustbar-inner { grid-template-columns: 1fr; }
  .hero-trust { gap: 0.8rem 1.2rem; }
}

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