/* ============================================================
   Plomberie-chauffage — template vitrine ATOM Studios
   Palette eau (bleus profonds) + accent cuivre/orange (chauffage)
   ============================================================ */

:root {
  --blue-900: #0a2f54;
  --blue-800: #0b3a66;
  --blue-700: #0e4f8a;
  --blue-500: #1d7fd0;
  --blue-300: #6fb4e8;
  --blue-50:  #eef6fc;

  --copper: #c8721f;
  --orange: #f08a24;
  --orange-300: #f7b15e;

  --ink: #122231;
  --muted: #51677a;
  --line: #dde7f0;
  --bg: #ffffff;
  --bg-soft: #f4f8fc;

  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 12px 34px rgba(11, 58, 102, 0.10);
  --shadow-sm: 0 4px 16px rgba(11, 58, 102, 0.08);
  --maxw: 1140px;
  --header-h: 72px;

  --font: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { line-height: 1.18; margin: 0 0 .5em; color: var(--blue-900); letter-spacing: -.01em; }
p { margin: 0 0 1em; }
a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }

.section { padding: 84px 0; }
@media (max-width: 720px) { .section { padding: 56px 0; } }

.kicker {
  display: inline-block;
  font-size: .8rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  color: var(--blue-500); margin: 0 0 .6em;
}
.section-head { max-width: 720px; margin: 0 auto 48px; text-align: center; }
.section-head h2 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); }
.section-lead { color: var(--muted); font-size: 1.05rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5em;
  padding: 12px 22px; border-radius: 999px; font-weight: 700; font-size: .98rem;
  cursor: pointer; border: 2px solid transparent; transition: transform .15s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-lg { padding: 15px 28px; font-size: 1.04rem; }
.btn-block { width: 100%; }

.btn-primary {
  background: linear-gradient(135deg, var(--orange) 0%, var(--copper) 100%);
  color: #fff; box-shadow: 0 8px 22px rgba(200, 114, 31, 0.32);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(200, 114, 31, 0.42); }

.btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.55); }
.btn-ghost:hover { background: rgba(255,255,255,.12); border-color: #fff; }
.btn-ghost-dark { color: var(--blue-800); border-color: var(--blue-500); }
.btn-ghost-dark:hover { background: var(--blue-50); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92); backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 16px; height: var(--header-h); }
.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; }
.logo-mark { display: inline-flex; }
.logo-text { font-size: 1.15rem; color: var(--blue-900); letter-spacing: -.02em; }

.nav { margin-left: auto; display: flex; align-items: center; gap: 22px; }
.nav > a:not(.btn):not(.btn-tel) {
  font-weight: 600; color: var(--ink); font-size: .96rem; position: relative; padding: 4px 0;
}
.nav > a:not(.btn):not(.btn-tel)::after {
  content: ""; position: absolute; left: 0; bottom: -2px; width: 0; height: 2px;
  background: var(--orange); transition: width .2s ease;
}
.nav > a:not(.btn):not(.btn-tel):hover::after { width: 100%; }

.header-tel {
  display: inline-flex; align-items: center; gap: 6px; font-weight: 700; color: var(--blue-700);
}
.header-tel:hover { color: var(--blue-500); }
.header-cta { padding: 10px 18px; }

.burger {
  margin-left: auto; display: none; flex-direction: column; gap: 5px;
  background: none; border: 0; cursor: pointer; padding: 8px;
}
.burger span { width: 26px; height: 3px; background: var(--blue-900); border-radius: 3px; transition: transform .25s ease, opacity .2s ease; }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { position: relative; color: #fff; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-pattern { width: 100%; height: 100%; display: block; }
.hero-inner { position: relative; z-index: 1; padding: 96px 22px 104px; max-width: 760px; }
@media (max-width: 720px) { .hero-inner { padding: 64px 22px 72px; } }

.hero-eyebrow {
  display: inline-block; font-weight: 700; letter-spacing: .04em;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.22);
  padding: 6px 14px; border-radius: 999px; font-size: .9rem; margin-bottom: 18px;
}
.hero-title { color: #fff; font-size: clamp(2.1rem, 5.4vw, 3.5rem); margin-bottom: .35em; }
/* Fallback élégant si  est vide : masqué par défaut, révélé en JS */
.hero-title-fallback { display: none; }
.hero-title.is-empty .hero-title-fallback { display: inline; }

.hero-sub { color: rgba(255,255,255,.9); font-size: 1.15rem; max-width: 560px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin: 26px 0 22px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 9px; margin: 0;
  color: rgba(255,255,255,.92); font-size: .95rem; font-weight: 600;
}

/* ---------- Bandeau confiance ---------- */
.trust { background: var(--blue-900); color: #fff; }
.trust-inner {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px;
  padding: 26px 22px;
}
.trust-item { display: flex; align-items: center; gap: 12px; color: var(--orange-300); }
.trust-item span { display: flex; flex-direction: column; color: rgba(255,255,255,.78); font-size: .85rem; }
.trust-item strong { color: #fff; font-size: .98rem; }
@media (max-width: 860px) { .trust-inner { grid-template-columns: repeat(2, 1fr); gap: 18px; } }
@media (max-width: 460px) { .trust-inner { grid-template-columns: 1fr; } }

/* ---------- Services ---------- */
.services { background: var(--bg); }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
@media (max-width: 940px) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .cards { grid-template-columns: 1fr; } }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 26px; box-shadow: var(--shadow-sm);
  transition: transform .2s ease, box-shadow .25s ease, border-color .2s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--blue-300); }
.card h3 { font-size: 1.22rem; margin-bottom: .4em; }
.card p { color: var(--muted); margin: 0; font-size: .98rem; }

.card-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 58px; height: 58px; border-radius: 14px; margin-bottom: 16px;
}
.icon-water { background: var(--blue-50); color: var(--blue-700); }
.icon-heat  { background: #fdf0e2; color: var(--copper); }
.icon-urgent{ background: #fde6df; color: #d2491b; }

/* ---------- Pourquoi nous ---------- */
.why { background: var(--bg-soft); }
.why-inner { display: grid; grid-template-columns: 1.3fr .9fr; gap: 48px; align-items: center; }
@media (max-width: 860px) { .why-inner { grid-template-columns: 1fr; gap: 32px; } }
.why-text h2 { font-size: clamp(1.6rem, 3.2vw, 2.2rem); }
.why-list { list-style: none; margin: 24px 0 0; padding: 0; display: grid; gap: 16px; }
.why-list li { display: flex; gap: 12px; align-items: flex-start; color: var(--ink); }
.why-list svg { color: var(--blue-500); flex: 0 0 auto; margin-top: 1px; }
.why-list strong { color: var(--blue-900); }

.why-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.stat {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px 18px; text-align: center; box-shadow: var(--shadow-sm);
}
.stat-num { display: block; font-size: 1.9rem; font-weight: 800; color: var(--copper); line-height: 1; }
.stat-label { display: block; margin-top: 8px; color: var(--muted); font-size: .9rem; }

/* ---------- Zone ---------- */
.zone { background: var(--bg); }
.zone-inner { display: grid; grid-template-columns: .8fr 1.2fr; gap: 48px; align-items: center; }
@media (max-width: 860px) { .zone-inner { grid-template-columns: 1fr; gap: 28px; } }
.zone-map {
  background: linear-gradient(160deg, var(--blue-50), #fff);
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow-sm); max-width: 360px; margin: 0 auto;
}
.zone-text h2 { font-size: clamp(1.6rem, 3.2vw, 2.2rem); }
.zone-addr { display: inline-flex; align-items: center; gap: 9px; color: var(--blue-700); font-weight: 600; margin: 4px 0 22px; }
.zone-cta { display: flex; flex-wrap: wrap; gap: 12px; }

/* ---------- Contact ---------- */
.contact { background: var(--bg-soft); }
.contact-inner { display: grid; grid-template-columns: 1fr 1.1fr; gap: 48px; align-items: start; }
@media (max-width: 860px) { .contact-inner { grid-template-columns: 1fr; gap: 32px; } }
.contact-info h2 { font-size: clamp(1.6rem, 3.2vw, 2.2rem); }
.contact-list { list-style: none; margin: 22px 0 0; padding: 0; display: grid; gap: 16px; }
.contact-list li { display: flex; gap: 12px; align-items: center; color: var(--ink); }
.contact-list svg { color: var(--blue-500); flex: 0 0 auto; }
.contact-tel { font-weight: 700; color: var(--blue-700); }
.contact-tel:hover { color: var(--orange); }

.contact-form {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px; box-shadow: var(--shadow);
}
.field { margin-bottom: 16px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 480px) { .field-row { grid-template-columns: 1fr; } }
.field label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: 6px; color: var(--blue-900); }
.field input, .field select, .field textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: var(--radius-sm);
  font: inherit; color: var(--ink); background: #fcfdff; transition: border-color .15s ease, box-shadow .15s ease;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--blue-500); box-shadow: 0 0 0 3px rgba(29,127,208,.16);
}
.field textarea { resize: vertical; }
.form-success {
  margin: 14px 0 0; padding: 12px 14px; border-radius: var(--radius-sm);
  background: #e6f6ec; color: #1d7a45; border: 1px solid #b8e6c8; font-weight: 600; font-size: .95rem;
}
.form-note { margin: 12px 0 0; text-align: center; color: var(--muted); font-size: .85rem; }

/* ---------- Footer ---------- */
.site-footer { background: var(--blue-900); color: rgba(255,255,255,.8); }
.footer-inner {
  display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 36px; padding: 56px 22px 40px;
}
@media (max-width: 760px) { .footer-inner { grid-template-columns: 1fr; gap: 28px; } }
.footer-brand .logo-text { color: #fff; font-size: 1.2rem; }
.footer-brand p { margin-top: 10px; font-size: .94rem; max-width: 340px; }
.footer-col h3 { color: #fff; font-size: 1rem; margin-bottom: 14px; }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 9px; font-size: .94rem; }
.footer-col a:hover { color: var(--orange-300); }
.footer-tel { color: var(--orange-300); font-weight: 700; }

.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); }
.footer-bottom-inner {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px;
  padding: 18px 22px; font-size: .85rem; color: rgba(255,255,255,.6);
}
.footer-credit { opacity: .7; }

/* ---------- Mobile nav ---------- */
@media (max-width: 880px) {
  .burger { display: flex; }
  .nav {
    position: fixed; inset: var(--header-h) 0 auto 0; flex-direction: column; align-items: stretch;
    gap: 6px; background: #fff; padding: 18px 22px 26px; margin: 0;
    border-bottom: 1px solid var(--line); box-shadow: var(--shadow);
    transform: translateY(-12px); opacity: 0; pointer-events: none; transition: transform .22s ease, opacity .22s ease;
  }
  .nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav > a:not(.btn):not(.btn-tel) { padding: 12px 4px; border-bottom: 1px solid var(--line); }
  .header-tel { padding: 12px 4px; }
  .header-cta { margin-top: 10px; text-align: center; }
}

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn, .card { transition: none; }
}