/* =========================================================
   IA TRANSPORTS — feuille de style
   Identité : panneau routier (bleu autoroute + orange chantier)
   ========================================================= */
:root {
  --sign: #1D4E9E;        /* bleu panneau */
  --sign-dark: #14386F;
  --ink: #0F1E33;         /* texte */
  --muted: #55647A;
  --page: #EDF1F6;        /* fond */
  --paper: #FFFFFF;
  --line: #CBD5E2;
  --cone: #F0641E;        /* orange chantier : actions */
  --cone-dark: #D24F0E;

  --radius-sign: 12px;
  --radius-field: 8px;
  --header-h: 76px;
  --font: "Overpass", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 16px); }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--page);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--sign); }
:focus-visible { outline: 3px solid var(--cone); outline-offset: 3px; border-radius: 4px; }

.container { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }

h1, h2, h3 { line-height: 1.1; letter-spacing: -0.02em; margin: 0; }
h2 { font-size: clamp(28px, 3.4vw, 40px); font-weight: 900; }
h3 { font-size: 19px; font-weight: 800; }
p { margin: 0; }
.lead { font-size: 19px; color: var(--muted); max-width: 60ch; margin-top: 14px; }
.muted { color: var(--muted); }

/* ===================== Header ===================== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); }
.brand img { width: 44px; height: 44px; }
.brand-name { font-weight: 900; font-size: 19px; letter-spacing: 0.01em; line-height: 1; }
.brand-sub { display: block; font-size: 13px; color: var(--muted); font-weight: 500; margin-top: 4px; letter-spacing: 0; }

.nav { display: flex; gap: 4px; }
.nav a {
  text-decoration: none; color: var(--ink); font-weight: 700; font-size: 16px;
  padding: 8px 14px; border-radius: 6px;
}
.nav a:hover { background: var(--page); }
.nav a[aria-current="page"] { color: var(--sign); box-shadow: inset 0 -3px 0 var(--cone); border-radius: 0; }

.header-actions { display: flex; align-items: center; gap: 10px; }

/* ===================== Buttons ===================== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  font: inherit; font-weight: 800; font-size: 16px; line-height: 1;
  padding: 15px 22px; border-radius: 8px; border: 2px solid transparent;
  text-decoration: none; cursor: pointer;
  transition: background-color .15s ease, border-color .15s ease, color .15s ease;
}
.btn svg { width: 18px; height: 18px; flex: none; }
.btn-go { background: var(--cone); color: #fff; }
.btn-go:hover { background: var(--cone-dark); }
.btn-go:disabled { opacity: .6; cursor: progress; }
.btn-line { border-color: currentColor; color: var(--sign); background: transparent; }
.btn-line:hover { background: var(--sign); border-color: var(--sign); color: #fff; }
.btn-on-sign { border-color: #fff; color: #fff; background: transparent; }
.btn-on-sign:hover { background: #fff; color: var(--sign); }
.btn-small { padding: 11px 16px; font-size: 15px; }

/* ===================== Burger / drawer ===================== */
.burger {
  display: none; width: 46px; height: 46px; border-radius: 8px;
  border: 1px solid var(--line); background: var(--paper); cursor: pointer;
  align-items: center; justify-content: center; flex-direction: column; gap: 5px;
}
.burger span { width: 20px; height: 2px; background: var(--ink); border-radius: 2px; }

.drawer {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(15, 30, 51, .5);
  opacity: 0; pointer-events: none; transition: opacity .25s ease;
}
.drawer.open { opacity: 1; pointer-events: auto; }
.drawer-panel {
  position: absolute; top: 0; right: 0; height: 100%; width: min(340px, 88vw);
  background: var(--paper); padding: 20px; display: flex; flex-direction: column; gap: 22px;
  transform: translateX(100%); transition: transform .25s ease;
}
.drawer.open .drawer-panel { transform: none; }
.drawer-head { display: flex; justify-content: space-between; align-items: center; }
.drawer-close {
  width: 42px; height: 42px; border-radius: 8px; border: 1px solid var(--line);
  background: var(--paper); font-size: 20px; cursor: pointer; color: var(--ink);
}
.drawer-links { display: flex; flex-direction: column; }
.drawer-links a {
  text-decoration: none; color: var(--ink); font-weight: 800; font-size: 20px;
  padding: 14px 0; border-bottom: 1px solid var(--line);
}
.drawer-links a[aria-current="page"] { color: var(--sign); }
.drawer-contact { display: flex; flex-direction: column; gap: 10px; margin-top: auto; }

/* ===================== The sign (signature element) ===================== */
.sign {
  position: relative;
  background: var(--sign); color: #fff;
  border-radius: var(--radius-sign);
  padding: clamp(28px, 4vw, 48px);
}
.sign::before {          /* liseré blanc intérieur, comme un panneau */
  content: ""; position: absolute; inset: 9px;
  border: 3px solid #fff; border-radius: calc(var(--radius-sign) - 5px);
  pointer-events: none;
}
.sign > * { position: relative; }
.sign-route {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  font-weight: 800; font-size: 17px; padding-bottom: 18px; margin-bottom: 22px;
  border-bottom: 2px solid rgba(255,255,255,.35);
}
.sign-route svg { width: 46px; height: 18px; flex: none; }
.sign h1 {
  font-size: clamp(38px, 5vw, 64px); overflow-wrap: break-word; font-weight: 900; letter-spacing: -0.035em; line-height: .98;
}
.sign p { color: rgba(255,255,255,.9); margin-top: 18px; max-width: 46ch; }
.sign-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

/* ===================== Hero ===================== */
.hero { padding: 28px 0 0; }
.hero-grid {
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: 16px; align-items: stretch;
}
.hero-photo { border-radius: var(--radius-sign); overflow: hidden; min-height: 360px; }
.hero-photo img { width: 100%; height: 100%; object-fit: cover; object-position: 60% center; }

/* ===================== Facts row ===================== */
.facts {
  display: grid; grid-template-columns: repeat(3, 1fr);
  margin-top: 16px; background: var(--paper); border-radius: var(--radius-sign);
}
.fact { padding: 22px 26px; }
.fact + .fact { border-left: 1px solid var(--line); }
.fact strong { display: block; font-size: 18px; font-weight: 800; }
.fact span { color: var(--muted); font-size: 15px; }

/* ===================== Sections ===================== */
.section { padding: 80px 0; }
.section-head { margin-bottom: 36px; }
.page-head { padding: 56px 0 8px; }
.page-head h1 { font-size: clamp(36px, 4.6vw, 56px); font-weight: 900; letter-spacing: -0.03em; max-width: 18ch; }

/* ===================== Quote form ===================== */
.quote-grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr); gap: 28px; align-items: start; }
.form {
  background: var(--paper); border-radius: var(--radius-sign);
  padding: clamp(22px, 3.5vw, 40px); border-top: 6px solid var(--cone);
}
.form h2 { margin-bottom: 8px; }
.form > .muted { margin-bottom: 26px; }
fieldset { border: 0; padding: 0; margin: 0 0 22px; }
legend { font-weight: 900; font-size: 15px; color: var(--sign); padding: 0; margin-bottom: 12px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 16px; }
.grid-3f { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 14px 16px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 15px; font-weight: 700; }
.field .opt { font-weight: 500; color: var(--muted); }
.input, .select, .textarea {
  width: 100%; font: inherit; font-size: 16px; color: var(--ink);
  padding: 12px 14px; border-radius: var(--radius-field);
  border: 1.5px solid var(--line); background: #F8FAFC;
}
.input:focus, .select:focus, .textarea:focus {
  outline: none; border-color: var(--sign); background: #fff;
  box-shadow: 0 0 0 3px rgba(29, 78, 158, .18);
}
.textarea { min-height: 110px; resize: vertical; }
.input, .select { height: 50px; }
.select {
  appearance: none; -webkit-appearance: none; padding-right: 40px; cursor: pointer;
  background: #F8FAFC url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 6l4 4 4-4' fill='none' stroke='%231D4E9E' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") right 14px center/16px no-repeat;
}
.form-foot { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-top: 8px; }
.form-status { font-weight: 700; }
.form-status.error { color: #B3261E; }

.steps-panel { position: sticky; top: calc(var(--header-h) + 20px); }
.steps-panel img { border-radius: var(--radius-sign); aspect-ratio: 4 / 3; object-fit: cover; width: 100%; }
.steps-panel h3 { margin: 24px 0 14px; font-size: 22px; }
.steps { list-style: none; padding: 0; margin: 0; counter-reset: s; }
.steps li { counter-increment: s; display: grid; grid-template-columns: 34px 1fr; gap: 12px; padding: 12px 0; border-top: 1px solid var(--line); }
.steps li::before {
  content: counter(s); width: 30px; height: 30px; border-radius: 6px;
  background: var(--sign); color: #fff; font-weight: 900; display: grid; place-items: center; font-size: 15px;
}

/* ===================== Services list ===================== */
.service-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 48px; }
.service-item { display: grid; grid-template-columns: 56px 1fr; gap: 18px; padding: 26px 0; border-top: 2px solid var(--ink); }
.service-icon {
  width: 56px; height: 56px; border-radius: 10px; background: var(--sign);
  display: grid; place-items: center; font-size: 26px;
  box-shadow: inset 0 0 0 4px var(--sign), inset 0 0 0 6px #fff;
}
.service-item p { color: var(--muted); margin-top: 6px; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.tag { font-size: 14px; font-weight: 700; color: var(--sign-dark); background: var(--paper); border: 1px solid var(--line); padding: 3px 10px; border-radius: 4px; }

/* ===================== About ===================== */
.about-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); gap: 56px; align-items: start; }
.prose p { margin-bottom: 18px; max-width: 64ch; }
.prose h2 { font-size: 28px; margin: 40px 0 14px; }
.checklist { list-style: none; padding: 0; margin: 0 0 18px; }
.checklist li { padding: 10px 0 10px 34px; border-bottom: 1px solid var(--line); position: relative; }
.checklist li::before {
  content: ""; position: absolute; left: 0; top: 14px; width: 18px; height: 18px; border-radius: 4px;
  background: var(--cone) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3.5 8.5l3 3 6-7' fill='none' stroke='%23fff' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/14px no-repeat;
}
.about-photos { display: grid; gap: 16px; position: sticky; top: calc(var(--header-h) + 20px); }
.about-photos img { border-radius: var(--radius-sign); width: 100%; object-fit: cover; }
.about-photos img:first-child { aspect-ratio: 3 / 2; }
.about-photos img:last-child { aspect-ratio: 4 / 3; }

/* ===================== CTA sign ===================== */
.cta-sign { display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; }
.cta-sign h2 { color: #fff; }
.cta-sign p { margin-top: 8px; }

/* ===================== Legal + footer ===================== */
.site-footer { background: var(--ink); color: rgba(255,255,255,.8); padding: 48px 0 32px; margin-top: 40px; font-size: 15px; }
.footer-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 32px; }
.site-footer .brand { color: #fff; }
.site-footer .brand-sub { color: rgba(255,255,255,.6); }
.site-footer h3 { font-size: 15px; color: #fff; margin-bottom: 10px; }
.site-footer a { color: #fff; text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }
.footer-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.legal { border-top: 1px solid rgba(255,255,255,.15); margin-top: 36px; padding-top: 20px; color: rgba(255,255,255,.6); font-size: 14px; }

/* ===================== Thank-you page ===================== */
.thanks { min-height: calc(100vh - var(--header-h) - 200px); display: grid; place-items: center; padding: 60px 0; }
.thanks .sign { max-width: 640px; }

/* ===================== Responsive ===================== */
@media (max-width: 1000px) {
  .hero-grid, .quote-grid, .about-grid { grid-template-columns: 1fr; }
  .hero-photo { min-height: 280px; max-height: 380px; }
  .steps-panel, .about-photos { position: static; }
  .service-list { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
  .nav, .header-actions .btn { display: none; }
  .burger { display: inline-flex; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .facts { grid-template-columns: 1fr; }
  .fact + .fact { border-left: 0; border-top: 1px solid var(--line); }
  .grid-2, .grid-3f { grid-template-columns: 1fr; }
  .section { padding: 56px 0; }
  .footer-grid { grid-template-columns: 1fr; }
  .brand-sub { display: none; }
  .sign-actions .btn { width: 100%; }
}