/* ==========================================================================
   Duverger & Fils — feuille de style unique
   Maquette WebnexLab. Aucune dépendance, aucun build.

   Registre : chantier. Typographie condensée et large, blocs pleins, angles
   à peine adoucis, une couleur de sécurité qui tranche. Rien n'est partagé
   avec les autres maquettes.
   ========================================================================== */

/* --- 1. Jetons de couleur (une ambiance = un bloc) ----------------------- */

:root,
[data-palette="ardoise"] {
  --bg: #f3f5f7;
  --bg-alt: #e7ebef;
  --surface: #ffffff;
  --deep: #161a1f;
  --ink: #151a20;
  --muted: #5c6873;
  --line: #d8dee5;
  --accent: #d9631e;
  --accent-deep: #b04d13;
  --accent-soft: #fbeade;
  --accent-fg: #fff8f3;
  --shadow: 21 26 32;
}

[data-palette="zinc"] {
  --bg: #f2f5f7;
  --bg-alt: #e5ebef;
  --surface: #ffffff;
  --deep: #1a1d22;
  --ink: #171c22;
  --muted: #566672;
  --line: #d5dee4;
  --accent: #2f6f8f;
  --accent-deep: #235572;
  --accent-soft: #e0edf3;
  --accent-fg: #f4fafd;
  --shadow: 26 29 34;
}

[data-palette="brique"] {
  --bg: #f8f2ed;
  --bg-alt: #f0e6dd;
  --surface: #fffcfa;
  --deep: #20160f;
  --ink: #201811;
  --muted: #6f5e52;
  --line: #e6d8cb;
  --accent: #9e3b22;
  --accent-deep: #7d2c17;
  --accent-soft: #f6e2da;
  --accent-fg: #fff7f4;
  --shadow: 32 22 15;
}

[data-palette="nuit"] {
  --bg: #0e1013;
  --bg-alt: #14171b;
  --surface: #171a1e;
  --deep: #08090b;
  --ink: #e9edf2;
  --muted: #929daa;
  --line: #242930;
  --accent: #f2a33c;
  --accent-deep: #d98c22;
  --accent-soft: #221d15;
  --accent-fg: #12100b;
  --shadow: 0 0 0;
}

/* --- 2. Jetons non colorés ---------------------------------------------- */

:root {
  --display: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --sans: "Public Sans", "Helvetica Neue", Arial, sans-serif;
  --shell: 1200px;
  --gutter: clamp(1.15rem, 5vw, 3.5rem);
  --section: clamp(4rem, 9vw, 7rem);
  --r: 6px;
  --ease: cubic-bezier(.25,.6,.3,1);
}

/* --- 3. Base ------------------------------------------------------------ */

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: var(--sans); font-size: 1rem; line-height: 1.68; font-weight: 400;
  overflow-x: hidden; -webkit-font-smoothing: antialiased;
  transition: background-color .5s var(--ease), color .5s var(--ease);
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
ul { margin: 0; padding: 0; list-style: none; }

/* L'attribut `hidden` du HTML doit toujours gagner. */
[hidden] { display: none !important; }

/* Vignette intégrée dans le site WebnexLab (`?apercu=1`). */
.is-apercu, .is-apercu body { overflow: hidden; }
.is-apercu .palette-picker,
.is-apercu .demo-flag { display: none; }
.is-apercu .reveal { opacity: 1; transform: none; transition: none; }

p { margin: 0; }

h1, h2, h3 { margin: 0; font-family: var(--display); font-weight: 800; line-height: 1.02; letter-spacing: -.025em; }
h1 { font-size: clamp(2.6rem, 7vw, 4.6rem); text-transform: uppercase; }
h2 { font-size: clamp(1.9rem, 4.2vw, 2.9rem); text-transform: uppercase; }
h3 { font-size: 1.1rem; font-weight: 700; letter-spacing: -.01em; line-height: 1.25; }

.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.ico { width: 1.15em; height: 1.15em; flex: none; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: fixed; top: .6rem; left: 50%; transform: translate(-50%, -200%);
  z-index: 300; padding: .6rem 1.1rem; background: var(--deep); color: #fff; font-size: .85rem;
}
.skip-link:focus { transform: translate(-50%, 0); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.shell { width: 100%; max-width: var(--shell); margin-inline: auto; padding-inline: var(--gutter); }
.shell.narrow { max-width: 780px; }
.section { padding-block: var(--section); }

.over { font-size: .7rem; text-transform: uppercase; letter-spacing: .2em; font-weight: 700; color: var(--accent-deep); margin-bottom: .9rem; }
.hl { color: var(--accent); }

/* --- 4. Apparition ------------------------------------------------------ */

.reveal {
  opacity: 0; transform: translateY(16px);
  transition: opacity .65s var(--ease) var(--d, 0ms), transform .65s var(--ease) var(--d, 0ms);
}
.reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation-duration: .001ms !important; animation-iteration-count: 1 !important; }
}

/* --- 5. Boutons --------------------------------------------------------- */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .55rem;
  padding: .95rem 1.8rem; border-radius: var(--r); border: 2px solid transparent;
  font-family: var(--display); font-weight: 700; font-size: .92rem;
  text-transform: uppercase; letter-spacing: .02em;
  transition: background-color .25s var(--ease), color .25s var(--ease),
              border-color .25s var(--ease), transform .25s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn--solid { background: var(--accent); color: var(--accent-fg); }
.btn--solid:hover { background: var(--accent-deep); }
.btn--line { border-color: var(--ink); color: var(--ink); }
.btn--line:hover { background: var(--ink); color: var(--bg); }
.btn--full { width: 100%; }

/* --- 6. Sélecteur de palette (sous l'en-tête, à gauche) ----------------- */

.palette-picker { position: fixed; top: 7.4rem; left: 1rem; z-index: 120; }
.palette-picker__toggle {
  display: inline-flex; align-items: center; gap: .5rem; padding: .5rem 1rem .5rem .8rem;
  border-radius: var(--r); background: var(--surface); color: var(--ink); border: 2px solid var(--line);
  box-shadow: 0 8px 24px rgb(var(--shadow) / .12);
  font-family: var(--display); font-weight: 700; font-size: .76rem; text-transform: uppercase;
  transition: border-color .25s var(--ease);
}
.palette-picker__toggle:hover { border-color: var(--accent); }
.palette-picker__panel {
  margin-top: .5rem; width: 15.5rem; padding: 1rem; border-radius: var(--r);
  background: var(--surface); border: 2px solid var(--line);
  box-shadow: 0 16px 40px rgb(var(--shadow) / .16); animation: pop .25s var(--ease);
}
@keyframes pop { from { opacity: 0; transform: translateY(-6px) } }
.palette-picker__title { font-size: .64rem; text-transform: uppercase; letter-spacing: .16em; color: var(--muted); font-weight: 700; margin-bottom: .7rem; }
.palette-picker__grid { display: grid; grid-template-columns: 1fr 1fr; gap: .45rem; }
.palette-picker__grid button {
  display: flex; align-items: center; gap: .5rem; padding: .5rem; border-radius: 4px;
  border: 1px solid var(--line); font-size: .76rem; font-weight: 500;
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}
.palette-picker__grid button:hover { border-color: var(--accent); }
.palette-picker__grid button[aria-checked="true"] { border-color: var(--accent); background: var(--accent-soft); color: var(--accent-deep); font-weight: 700; }
.palette-picker__grid button span {
  width: 1.1rem; height: 1.1rem; flex: none; border-radius: 3px;
  background: linear-gradient(135deg, var(--sw1) 0 33%, var(--sw2) 33% 66%, var(--sw3) 66%);
  box-shadow: inset 0 0 0 1px rgb(0 0 0 / .14);
}
.palette-picker__note { margin-top: .8rem; font-size: .71rem; line-height: 1.5; color: var(--muted); }

/* --- 7. Bandeau démonstration ------------------------------------------ */

.demo-flag { position: fixed; right: 1rem; bottom: 1rem; z-index: 120; max-width: min(23rem, calc(100vw - 2rem)); }
.demo-flag__btn {
  display: flex; align-items: center; gap: .5rem; margin-left: auto;
  padding: .55rem 1rem .55rem .8rem; border-radius: var(--r);
  background: var(--deep); color: #fff;
  font-family: var(--display); font-weight: 700; font-size: .74rem; text-transform: uppercase;
  box-shadow: 0 10px 26px rgb(var(--shadow) / .22); transition: transform .25s var(--ease);
}
.demo-flag__btn:hover { transform: translateY(-2px); }
.demo-flag__note {
  margin-top: .6rem; padding: 1.05rem 1.15rem; border-radius: var(--r);
  background: var(--surface); border: 2px solid var(--line);
  font-size: .8rem; line-height: 1.55; color: var(--muted);
  box-shadow: 0 16px 40px rgb(var(--shadow) / .16); animation: pop .25s var(--ease);
}
.demo-flag__note p + p { margin-top: .6rem; }
.demo-flag__note strong { color: var(--ink); font-weight: 700; }

/* --- 8. Barre d'urgence et en-tête -------------------------------------- */

.topbar { background: var(--deep); color: #fff; font-size: .82rem; }
.topbar__in { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .4rem 1.5rem; padding-block: .55rem; }
.topbar p { color: rgb(255 255 255 / .72); }
.topbar a { display: inline-flex; align-items: center; gap: .45rem; font-family: var(--display); font-weight: 700; color: var(--accent); }
.topbar a:hover { color: #fff; }

.head { position: sticky; top: 0; z-index: 90; background: var(--surface); border-bottom: 2px solid var(--line); }
.head__in { display: flex; align-items: center; gap: 1.5rem; min-height: 4.8rem; }

.brand { display: flex; align-items: center; gap: .8rem; margin-right: auto; }
.brand__mark {
  display: grid; place-items: center; width: 2.6rem; height: 2.6rem; flex: none;
  border-radius: var(--r); background: var(--accent); color: var(--accent-fg);
}
.brand__mark svg { width: 1.7rem; height: 1.7rem; }
.brand strong { display: block; font-family: var(--display); font-weight: 800; font-size: 1.05rem; text-transform: uppercase; letter-spacing: -.02em; }
.brand small { display: block; font-size: .68rem; text-transform: uppercase; letter-spacing: .1em; color: var(--muted); }

.nav { display: flex; align-items: center; gap: 1.6rem; font-size: .88rem; font-weight: 500; }
.nav a { color: var(--muted); transition: color .25s var(--ease); }
.nav a:hover { color: var(--accent-deep); }
.nav__cta {
  padding: .6rem 1.2rem; border-radius: var(--r); background: var(--accent); color: var(--accent-fg) !important;
  font-family: var(--display); font-weight: 700; text-transform: uppercase; font-size: .82rem;
}
.nav__cta:hover { background: var(--accent-deep); }

.burger { display: none; width: 2.6rem; height: 2.6rem; place-items: center; border-radius: var(--r); border: 2px solid var(--line); }

/* --- 9. Héros ----------------------------------------------------------- */

.hero { padding-block: clamp(3rem, 7vw, 5rem); border-bottom: 2px solid var(--line); }
.hero__in { display: grid; gap: clamp(2rem, 5vw, 3.5rem); grid-template-columns: minmax(0, 1.35fr) minmax(0, .65fr); align-items: center; }
.hero h1 { margin-bottom: 1.5rem; }
.hero__lede { max-width: 46ch; color: var(--muted); font-size: 1.05rem; }
.hero__cta { display: flex; flex-wrap: wrap; gap: .9rem; margin-top: 2.2rem; }

.badges { display: grid; gap: 1px; background: var(--line); border: 2px solid var(--line); border-radius: var(--r); overflow: hidden; grid-template-columns: 1fr 1fr; }
.badges li { background: var(--surface); padding: 1.2rem 1rem; text-align: center; }
.badges strong { display: block; font-family: var(--display); font-weight: 800; font-size: 1.6rem; color: var(--accent-deep); line-height: 1; }
.badges span { display: block; margin-top: .3rem; font-size: .76rem; color: var(--muted); }

/* --- 10. Titre de bloc -------------------------------------------------- */

.head-block { max-width: 54ch; margin-bottom: 2.6rem; }
.head-block h2 { margin-bottom: .9rem; }
.head-block > p:not(.over) { color: var(--muted); }
.head-block--light .over { color: var(--accent); }
.head-block--light h2 { color: #fff; }
.head-block--light > p:not(.over) { color: rgb(255 255 255 / .68); }

/* --- 11. Travaux -------------------------------------------------------- */

.works { display: grid; gap: 1px; background: var(--line); border: 2px solid var(--line); border-radius: var(--r); overflow: hidden; grid-template-columns: repeat(auto-fit, minmax(min(15rem, 100%), 1fr)); }
.work { background: var(--surface); padding: 1.9rem 1.6rem; display: flex; flex-direction: column; gap: .6rem; transition: background-color .3s var(--ease); }
.work:hover { background: var(--accent-soft); }
.work__icon { width: 2.6rem; height: 2.6rem; color: var(--accent); margin-bottom: .5rem; }
.work p { color: var(--muted); font-size: .92rem; flex: 1; }
.work__from { font-family: var(--display); font-weight: 700; font-size: .84rem; text-transform: uppercase; color: var(--accent-deep); }

.works__note { margin-top: 1.8rem; font-size: .86rem; color: var(--muted); max-width: 62ch; }

/* --- 12. Avant / après --------------------------------------------------- */

.band { background: var(--deep); color: #fff; }
[data-palette="nuit"] .band { border-block: 2px solid var(--line); }

.ba { max-width: 54rem; }
.ba__stage {
  position: relative; aspect-ratio: 16 / 9; overflow: hidden;
  border-radius: var(--r); border: 2px solid rgb(255 255 255 / .16);
  user-select: none;
}

/* Les deux « photos » sont des compositions CSS : elles gardent leurs couleurs
   quelle que soit l'ambiance, comme de vraies photographies, et seront
   remplacées par les clichés du client à la livraison. */
.ba__after, .ba__before { position: absolute; inset: 0; }
.ba__after {
  background:
    linear-gradient(178deg, #6f8ba3 0%, #6f8ba3 34%, #46586a 34.2%, #2f3d4a 100%),
    repeating-linear-gradient(94deg, rgb(0 0 0 / .16) 0 6px, transparent 6px 15px);
}
.ba__before {
  width: 50%;
  background:
    linear-gradient(178deg, #8d9aa4 0%, #8d9aa4 34%, #6b6257 34.2%, #443c33 100%),
    repeating-linear-gradient(94deg, rgb(0 0 0 / .3) 0 4px, transparent 4px 11px),
    radial-gradient(circle at 62% 72%, rgb(20 12 6 / .75) 0 8%, transparent 9%),
    radial-gradient(circle at 34% 84%, rgb(20 12 6 / .6) 0 5%, transparent 6%);
  border-right: 3px solid #fff;
}
.ba__tag {
  position: absolute; top: .8rem; left: .8rem; padding: .3rem .8rem; border-radius: 3px;
  background: rgb(0 0 0 / .62); color: #fff;
  font-family: var(--display); font-weight: 700; font-size: .72rem; text-transform: uppercase;
}
.ba__after .ba__tag { left: auto; right: .8rem; }

.ba__handle {
  position: absolute; top: 50%; left: 50%; width: 2.6rem; height: 2.6rem;
  transform: translate(-50%, -50%); border-radius: 999px;
  background: #fff; border: 3px solid var(--accent);
  box-shadow: 0 4px 16px rgb(0 0 0 / .4); pointer-events: none;
}
.ba__handle::before, .ba__handle::after {
  content: ""; position: absolute; top: 50%; width: 0; height: 0;
  border-block: 5px solid transparent;
}
.ba__handle::before { left: .45rem; transform: translateY(-50%); border-right: 6px solid var(--accent); }
.ba__handle::after { right: .45rem; transform: translateY(-50%); border-left: 6px solid var(--accent); }

.ba__range { display: block; width: 100%; margin-top: 1rem; accent-color: var(--accent); cursor: ew-resize; }

.ba__caption { margin-top: 1.2rem; font-size: .9rem; color: rgb(255 255 255 / .66); }
.ba__caption strong { display: block; font-family: var(--display); font-weight: 700; font-size: 1.05rem; color: #fff; text-transform: uppercase; margin-bottom: .2rem; }

/* --- 13. Garanties ------------------------------------------------------ */

.guards { display: grid; gap: 1.5rem; grid-template-columns: repeat(auto-fit, minmax(min(16rem, 100%), 1fr)); }
.guard { padding: 1.8rem 1.6rem; background: var(--surface); border: 2px solid var(--line); border-radius: var(--r); border-top-width: 5px; border-top-color: var(--accent); }
.guard__icon { width: 2.4rem; height: 2.4rem; color: var(--accent-deep); margin-bottom: 1rem; }
.guard h3 { margin-bottom: .5rem; }
.guard p { color: var(--muted); font-size: .92rem; }

/* --- 14. Questions ------------------------------------------------------ */

.faq { border-top: 2px solid var(--line); }
.faq details { border-bottom: 2px solid var(--line); }
.faq summary {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 1.25rem 0; cursor: pointer; list-style: none;
  font-family: var(--display); font-weight: 700; font-size: 1.02rem;
  transition: color .25s var(--ease);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { color: var(--accent-deep); }
.faq summary .ico { color: var(--accent); transition: transform .3s var(--ease); }
.faq details[open] summary .ico { transform: rotate(180deg); }
.faq details p { padding-bottom: 1.4rem; color: var(--muted); font-size: .94rem; max-width: 64ch; }

/* --- 15. Devis ---------------------------------------------------------- */

.devis { border-top: 2px solid var(--line); }
.devis__in { display: grid; gap: clamp(2rem, 5vw, 4rem); grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); align-items: start; }
.devis__lede { color: var(--muted); margin-top: 1rem; max-width: 46ch; }
.devis__call {
  display: flex; align-items: center; gap: 1rem; margin-top: 2rem;
  padding: 1.2rem 1.4rem; border-radius: var(--r); background: var(--accent-soft); color: var(--accent-deep);
}
.devis__call .ico { width: 1.8rem; height: 1.8rem; }
.devis__call strong { display: block; font-family: var(--display); font-weight: 800; font-size: 1.35rem; }
.devis__call span { font-size: .84rem; color: var(--muted); }

.form { display: grid; gap: 1.05rem; padding: clamp(1.5rem, 4vw, 2.2rem); border-radius: var(--r); background: var(--surface); border: 2px solid var(--line); }
.field { display: grid; gap: .35rem; }
.field label { font-size: .7rem; text-transform: uppercase; letter-spacing: .12em; font-weight: 700; color: var(--muted); }
.field input, .field select, .field textarea {
  width: 100%; padding: .75rem .9rem; font: inherit; font-size: .95rem; border-radius: 4px;
  background: var(--bg); color: var(--ink); border: 2px solid var(--line);
}
.field textarea { resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--accent); }
.field-row { display: grid; gap: 1.05rem; grid-template-columns: 1fr 1fr; }

.check { display: flex; gap: .6rem; align-items: flex-start; font-size: .85rem; color: var(--muted); }
.check input { margin-top: .3rem; accent-color: var(--accent); }

.form-status { font-size: .84rem; line-height: 1.55; color: var(--accent-deep); font-weight: 600; }
.form-status:empty { display: none; }

/* --- 16. Pied de page --------------------------------------------------- */

.foot { background: var(--deep); color: #fff; padding-block: 2.8rem 2.2rem; }
.foot__in { display: grid; gap: 1.4rem; }
.foot__brand { display: flex; align-items: center; gap: .9rem; }
.foot__brand strong { font-family: var(--display); font-weight: 800; font-size: 1.1rem; text-transform: uppercase; }
.foot__brand p { font-size: .86rem; color: rgb(255 255 255 / .62); }
.foot__nav { display: flex; flex-wrap: wrap; gap: 1.4rem; font-size: .88rem; color: rgb(255 255 255 / .7); }
.foot__nav a:hover { color: var(--accent); }
.foot__legal { font-size: .78rem; color: rgb(255 255 255 / .45); max-width: 62ch; }
.foot__legal-links { display: flex; flex-wrap: wrap; justify-content: center; gap: .5rem 1.5rem; margin-top: .85rem; }
.foot__legal-links a { font-size: .85rem; opacity: .85; padding-block: .35rem; text-decoration: underline; text-underline-offset: .2em; text-decoration-color: currentColor; }
.foot__legal-links a:hover, .foot__legal-links a:focus-visible { opacity: 1; }

/* --- 17. Adaptations ---------------------------------------------------- */

@media (max-width: 960px) {
  .hero__in, .devis__in { grid-template-columns: 1fr; }
  .badges { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 780px) {
  .burger { display: grid; }
  .nav {
    position: fixed; inset: 4.8rem 0 auto; z-index: 88; flex-direction: column;
    align-items: stretch; gap: 0; padding: .5rem var(--gutter) 1.4rem;
    background: var(--surface); border-bottom: 2px solid var(--line);
    transform: translateY(-130%); transition: transform .35s var(--ease);
  }
  .nav.is-open { transform: none; }
  .nav a { padding-block: .9rem; border-bottom: 1px solid var(--line); }
  .nav__cta { margin-top: .8rem; text-align: center; border-bottom: 0; }

  .palette-picker { top: 6.6rem; }
  .demo-flag { max-width: calc(100vw - 9.5rem); }
  .demo-flag__note { max-height: 55vh; overflow-y: auto; }

  .badges { grid-template-columns: 1fr 1fr; }
  .topbar__in { justify-content: center; text-align: center; }
}

@media (max-width: 520px) {
  .field-row { grid-template-columns: 1fr; }
}

@media (max-width: 420px) {
  .palette-picker__toggle span, .demo-flag__btn span { display: none; }
  .palette-picker__panel { width: min(17rem, calc(100vw - 2rem)); }
  .topbar p { display: none; }
}