/* ==================================================================
   METALLURGY — FEUILLE DE STYLE GLOBALE (style.css)
   ==================================================================
   Ce fichier CSS UNIQUE est partagé par TOUTES les pages du site.
   Aucun framework (pas de Tailwind, pas de Bootstrap).
   Aucun style inline.

   SOMMAIRE :
   1.  Variables CSS (couleurs, polices, dimensions)
   2.  Reset & Base
   3.  Utilitaires réutilisables
   4.  Motif de fond (grille technique)
   5.  Barre de navigation (Navbar) — commune
   6.  Boutons — communs
   7.  En-têtes de page (Page Headers) — communs
   8.  Footer — commun
   9.  Section CTA (appel à l'action) — commune
   10. PAGE ACCUEIL : Hero, Expertise, Stats, Works, Methodology
   11. PAGE EXPERTISE : Workshop, ISO, Standards, Service Area
   12. PAGE SERVICES : Blocs services, FAQ
   13. PAGE PROJETS : Galerie, Filtres
   14. PAGE ÉTUDE DE CAS : Hero projet, Spécifications, Galerie
   15. PAGE CONTACT : Formulaire, Sidebar infos
   16. Media Queries (Responsive)
   ================================================================== */


/* ==================================================================
   1. VARIABLES CSS
   ================================================================== */
:root {
  --color-primary: #3D6B85;
  --color-primary-hover: #4f8ba8;
  --color-primary-10: rgba(44, 62, 80, 0.1);
  --color-primary-30: rgba(44, 62, 80, 0.3);
  --color-bg: #f6f7f8;
  --color-surface: #fafafa;
  --color-text: #2c2c1a;
  --color-text-muted: #4a6670;
  --color-text-white: #FFFFFF;
  --color-separator: #dcdcdc;
  --color-footer-bg: #636466;
  --color-footer-text: #dcdcdc;
  --color-footer-muted: #c4c4c4;
  --color-footer-border: #636466;
  --font-main: 'Manrope', sans-serif;
  --navbar-height: 80px;
  --container-max: 1280px;
  --container-wide: 1600px;
  --section-padding: 6rem;
}


/* ==================================================================
   2. RESET & BASE
   ================================================================== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
main { flex-grow: 1; }
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
input, textarea, select, button { font-family: inherit; font-size: inherit; }


/* ==================================================================
   3. UTILITAIRES
   ================================================================== */
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 1.5rem; }
.container--wide { max-width: var(--container-wide); margin: 0 auto; padding: 0 1.5rem; }
.uppercase-spaced { text-transform: uppercase; letter-spacing: 0.15em; }
.grayscale { filter: grayscale(100%) contrast(1.1); }
.grayscale-hover { filter: grayscale(100%); transition: filter 0.7s ease, transform 0.7s ease; }
.grayscale-hover:hover { filter: grayscale(0%); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }


/* ==================================================================
   4. GRILLE DE FOND
   ================================================================== */
.grid-bg {
  background-size: 40px 40px;
  background-image:
    linear-gradient(to right, rgba(230,233,238,0.6) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(230,233,238,0.6) 1px, transparent 1px);
}


/* ==================================================================
   5. NAVBAR
   ================================================================== */
.navbar {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 50;
  background-color: #636466;
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
}
.navbar__inner { display: flex; align-items: center; justify-content: space-between; height: var(--navbar-height); }
.navbar__logo { display: flex; align-items: center; gap: 0.5rem; }
.navbar__logo-icon { color: var(--color-primary); font-size: 1.875rem; height: 4rem; width: auto; object-fit: contain; }
.navbar__logo-text { font-size: 1.25rem; font-weight: 700; letter-spacing: -0.025em; text-transform: uppercase; color: #ffffff; }
.navbar__links { display: flex; gap: 3rem; }
.navbar__link { font-size: 0.80rem; font-weight: 500; text-transform: uppercase; letter-spacing: 0.15em; color: rgba(255,255,255,0.8); transition: color 0.3s ease; }
.navbar__link--active { color: #ffffff; border-bottom: 1px solid #ffffff; padding-bottom: 2px; }
.navbar__link:hover { color: #ffffff; }
.navbar__mobile-btn { display: none; background: none; border: none; color: #ffffff; cursor: pointer; font-size: 1.5rem; }


/* ==================================================================
   6. BOUTONS
   ================================================================== */
.btn-primary {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 1rem 2rem; background-color: var(--color-primary); color: var(--color-text-white);
  font-size: 0.75rem; font-weight: 500; text-transform: uppercase; letter-spacing: 0.15em;
  border: 1px solid transparent; cursor: pointer;
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}
.btn-primary:hover { background-color: var(--color-primary-hover); box-shadow: 0 10px 25px -5px rgba(44,62,80,0.3); }
.btn-primary .material-icons { margin-left: 0.5rem; font-size: 1rem; }

.btn-outline {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 1rem 2rem; background-color: transparent; color: var(--color-text);
  font-size: 0.75rem; font-weight: 500; text-transform: uppercase; letter-spacing: 0.15em;
  border: 1px solid var(--color-text); cursor: pointer;
  transition: all 0.3s ease;
}
.btn-outline:hover { background-color: var(--color-primary); border-color: var(--color-primary); color: var(--color-text-white); }
.btn-outline .material-icons { margin-left: 0.5rem; font-size: 1rem; }


/* ==================================================================
   7. EN-TÊTES DE PAGE (pages intérieures)
   ================================================================== */
.page-header { padding-top: 8rem; padding-bottom: 5rem; border-bottom: 1px solid var(--color-separator); background-color: var(--color-surface); position: relative; overflow: hidden; }
.page-header__bg { position: absolute; inset: 0; pointer-events: none; opacity: 0.5; }
.page-header .container { position: relative; z-index: 1; }
.page-header__badge { font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.2em; color: var(--color-primary); margin-bottom: 1.5rem; display: flex; align-items: center; gap: 0.75rem; }
.page-header__badge::before { content: ''; width: 3rem; height: 1px; background-color: var(--color-primary); }
.page-header__title { font-size: 3rem; font-weight: 300; line-height: 1.15; letter-spacing: -0.02em; margin-bottom: 1.5rem; }
.page-header__title strong { font-weight: 600; color: var(--color-text-muted); }
.page-header__title em { font-weight: 600; font-style: normal; color: var(--color-text-muted); }
.page-header__description { font-size: 1.125rem; color: var(--color-text-muted); max-width: 40rem; line-height: 1.75; font-weight: 300; }
.page-header__grid { display: grid; grid-template-columns: 1fr; gap: 3rem; align-items: end; }
.page-header__inner { display: grid; grid-template-columns: 1fr; gap: 3rem; align-items: center; }
.page-header__image-wrapper { position: relative; aspect-ratio: 4/5; background-color: var(--color-surface); border: 1px solid var(--color-separator); padding: 0.5rem; box-shadow: 0 25px 50px -12px rgba(200,200,200,0.5); }
.page-header__image { width: 100%; height: 100%; object-fit: cover; }
.page-header__icon-badge { position: absolute; bottom: -1.5rem; left: -1.5rem; width: 7rem; height: 7rem; background-color: var(--color-primary); display: flex; align-items: center; justify-content: center; color: var(--color-text-white); box-shadow: 0 0 0 0.5rem white, 0 0 0 calc(0.5rem + 1px) var(--color-separator); }
.page-header__icon-badge .material-icons { font-size: 2.25rem; }


/* ==================================================================
   8. FOOTER
   ================================================================== */
.footer { background-color: var(--color-footer-bg); color: var(--color-footer-text); padding-top: 2rem; padding-bottom: 1rem; }
.footer__grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; margin-bottom: 1.5rem; }
.footer__logo { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 1.5rem; }
.footer__logo-icon { color: var(--color-text-white); font-size: 1.5rem; }
.footer__logo-text { font-size: 1.125rem; font-weight: 700; letter-spacing: -0.025em; color: var(--color-text-white); }
.footer__description { font-size: 0.875rem; color: var(--color-footer-muted); line-height: 1.7; max-width: 20rem; }
.footer__heading { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.15em; margin-bottom: 1.5rem; color: var(--color-text-white); }
.footer__nav-link { display: block; font-size: 0.875rem; color: var(--color-footer-muted); margin-bottom: 1rem; transition: color 0.3s ease; }
.footer__nav-link:hover { color: var(--color-text-white); }
.footer__contact-item { display: flex; align-items: flex-start; gap: 0.75rem; margin-bottom: 1rem; }
.footer__contact-item .material-icons { color: var(--color-footer-muted); font-size: 0.875rem; margin-top: 0.15rem; }
.footer__contact-item span, .footer__contact-item a { font-size: 0.875rem; color: var(--color-footer-muted); line-height: 1.5; }
.footer__contact-item a:hover { color: var(--color-text-white); }
.footer__cta-text { font-size: 0.875rem; color: var(--color-footer-muted); margin-bottom: 1rem; }
.footer__cta-btn { display: block; width: 100%; text-align: center; padding: 0.75rem; border: 1px solid var(--color-footer-text); color: var(--color-footer-text); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.15em; transition: all 0.3s ease; }
.footer__cta-btn:hover { background-color: var(--color-text-white); color: var(--color-primary); border-color: var(--color-text-white); }
.footer__bottom { border-top: 1px solid var(--color-footer-border); padding-top: 1rem; display: flex; flex-direction: column; align-items: center; gap: 1rem; }
.footer__copyright { font-size: 0.75rem; color: var(--color-footer-muted); }
.footer__legal-links { display: flex; gap: 1.5rem; }
.footer__legal-link { font-size: 0.75rem; color: var(--color-footer-muted); transition: color 0.3s ease; }
.footer__legal-link:hover { color: var(--color-text-white); }


/* ==================================================================
   9. CTA SECTION
   ================================================================== */
.cta-section { padding: var(--section-padding) 0; text-align: center; background-color: var(--color-surface); }
.cta-section__title { font-size: 2rem; font-weight: 300; margin-bottom: 1.5rem; line-height: 1.2; }
.cta-section__title em { font-weight: 500; font-style: italic; }
.cta-section__text { color: var(--color-text-muted); max-width: 36rem; margin: 0 auto 2.5rem; font-weight: 300; font-size: 1.125rem; line-height: 1.7; }
.cta-section__actions { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; }


/* ==================================================================
   10. PAGE ACCUEIL
   ================================================================== */

/* --- Hero --- */
.hero { position: relative; padding-top: 12rem; padding-bottom: 8rem; overflow: hidden; border-bottom: 1px solid var(--color-separator); }
.hero__texture { position: absolute; inset: 0; background-image: url('https://www.transparenttextures.com/patterns/brushed-alum.png'); opacity: 0.3; pointer-events: none; z-index: 0; }
.hero__grid { position: absolute; inset: 0; pointer-events: none; z-index: 0; }
.hero__content { position: relative; z-index: 1; display: grid; grid-template-columns: 1fr; gap: 3rem; align-items: center; }
.hero__badge { display: inline-block; padding: 0.25rem 0.75rem; margin-bottom: 1.5rem; border: 1px solid var(--color-separator); background-color: var(--color-surface); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.2em; color: var(--color-text-muted); }
.hero__title { font-size: 3.25rem; font-weight: 300; line-height: 1.1; letter-spacing: -0.02em; margin-bottom: 2rem; }
.hero__title strong { font-weight: 700; color: var(--color-text-muted); }
.hero__description { font-size: 1.125rem; color: var(--color-text-muted); max-width: 36rem; line-height: 1.75; font-weight: 300; padding-left: 1.5rem; border-left: 2px solid var(--color-primary); margin-bottom: 2.5rem; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 1rem; }
.hero__image-wrapper { position: relative; aspect-ratio: 4/5; background-color: var(--color-surface); border: 1px solid var(--color-separator); padding: 0.5rem; box-shadow: 0 25px 50px -12px rgba(200,200,200,0.5); }
.hero__image { width: 100%; height: 100%; object-fit: cover; }
.hero__icon-badge { position: absolute; bottom: -1.5rem; left: -1.5rem; width: 8rem; height: 8rem; background-color: var(--color-primary); display: flex; align-items: center; justify-content: center; color: var(--color-text-white); box-shadow: 0 0 0 0.5rem white, 0 0 0 calc(0.5rem + 1px) var(--color-separator); }
.hero__icon-badge .material-icons { font-size: 2.5rem; }

/* --- Expertise cards --- */
.expertise-section { padding: var(--section-padding) 0; background-color: var(--color-surface); }
.expertise-section__header { display: flex; flex-direction: column; margin-bottom: 4rem; padding-bottom: 2rem; border-bottom: 1px solid var(--color-separator); }
.expertise-section__title { font-size: 1.875rem; font-weight: 300; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 0.5rem; }
.expertise-section__subtitle { color: var(--color-text-muted); }
.expertise-section__view-all { display: none; align-items: center; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.15em; transition: color 0.3s ease; margin-top: 1rem; }
.expertise-section__view-all:hover { color: var(--color-primary); }
.expertise-section__view-all .material-icons { margin-left: 0.5rem; font-size: 0.875rem; transition: transform 0.3s ease; }
.expertise-section__view-all:hover .material-icons { transform: translateX(4px); }
.expertise-section__grid { display: grid; grid-template-columns: 1fr; gap: 2rem; }

.card-expertise { display: block; cursor: pointer; color: inherit; }
.card-expertise__image { position: relative; height: 20rem; overflow: hidden; margin-bottom: 1.5rem; border: 1px solid var(--color-separator); }
.card-expertise__overlay { position: absolute; inset: 0; background-color: transparent; transition: background-color 0.3s ease; z-index: 1; }
.card-expertise:hover .card-expertise__overlay { background-color: var(--color-primary-10); }
.card-expertise__image img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(100%); transition: transform 0.7s ease, filter 0.5s ease; }
.card-expertise:hover .card-expertise__image img { transform: scale(1.05); filter: grayscale(0%); }
.card-expertise__body { display: flex; align-items: flex-start; gap: 1rem; }
.card-expertise__number { font-size: 0.75rem; font-weight: 700; color: var(--color-primary); margin-top: 0.25rem; flex-shrink: 0; }
.card-expertise__title { font-size: 1.25rem; font-weight: 500; margin-bottom: 0.5rem; transition: color 0.3s ease; }
.card-expertise:hover .card-expertise__title { color: var(--color-primary); }
.card-expertise__text { font-size: 0.875rem; color: var(--color-text-muted); line-height: 1.7; }

/* --- Stats --- */
.stats { border-top: 1px solid var(--color-separator); border-bottom: 1px solid var(--color-separator); background-color: var(--color-bg); }
.stats__grid { display: grid; grid-template-columns: repeat(2,1fr); }
.stats__item { padding: 3rem 1.5rem; text-align: center; border-right: 1px solid var(--color-separator); }
.stats__item:nth-child(2n) { border-right: none; }
.stats__item:nth-child(-n+2) { border-bottom: 1px solid var(--color-separator); }
.stats__value { display: block; font-size: 2.5rem; font-weight: 300; color: var(--color-primary); margin-bottom: 0.25rem; }
.stats__label { font-size: 0.75rem; color: var(--color-text-muted); }

/* --- Works carousel --- */
.works { padding: var(--section-padding) 0; background-color: var(--color-bg); overflow: hidden; }
.works__header { margin-bottom: 4rem; }
.works__title { font-size: 1.875rem; font-weight: 300; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 0.5rem; }
.works__accent-line { width: 6rem; height: 1px; background-color: var(--color-primary); }
.works__carousel { display: flex; gap: 2rem; overflow-x: auto; padding: 0 1.5rem 2rem; scroll-snap-type: x mandatory; -ms-overflow-style: none; scrollbar-width: none; }
.works__carousel::-webkit-scrollbar { display: none; }
.works__card { min-width: 85vw; scroll-snap-align: center; flex-shrink: 0; }
.works__card-image { aspect-ratio: 16/9; overflow: hidden; border: 1px solid var(--color-separator); background-color: var(--color-surface); padding: 4px; }
.works__card-image img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(100%); transition: transform 1s ease, filter 0.5s ease; }
.works__card:hover .works__card-image img { transform: scale(1.05); filter: grayscale(0%); }
.works__card-info { margin-top: 1.5rem; display: flex; justify-content: space-between; align-items: flex-end; padding-bottom: 1rem; border-bottom: 1px solid var(--color-separator); }
.works__card-category { font-size: 0.75rem; font-weight: 700; color: var(--color-primary); text-transform: uppercase; letter-spacing: 0.15em; margin-bottom: 0.25rem; }
.works__card-name { font-size: 1.5rem; font-weight: 300; }
.works__card-explore { display: flex; align-items: center; gap: 0.5rem; font-size: 0.875rem; font-weight: 500; opacity: 0; transition: opacity 0.3s ease; }
.works__card-explore .material-icons { font-size: 0.875rem; }
.works__card:hover .works__card-explore { opacity: 1; }

/* --- Methodology --- */
.methodology { padding: var(--section-padding) 0; background-color: var(--color-surface); position: relative; }
.methodology__bg { position: absolute; inset: 0; opacity: 0.3; pointer-events: none; z-index: 0; }
.methodology__content { position: relative; z-index: 1; }
.methodology__header { text-align: center; max-width: 42rem; margin: 0 auto 5rem; }
.methodology__title { font-size: 1.875rem; font-weight: 300; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 1rem; }
.methodology__subtitle { color: var(--color-text-muted); }
.methodology__steps { display: grid; grid-template-columns: 1fr; position: relative; }
.methodology__connector { display: none; position: absolute; top: 3rem; left: 0; width: 100%; height: 1px; background-color: var(--color-separator); z-index: -1; }
.methodology__step { padding: 1.5rem; background-color: var(--color-surface); border-right: 1px solid var(--color-separator); border-bottom: 1px solid var(--color-separator); text-align: center; }
.methodology__step:last-child { border-right: none; }
.methodology__step-icon { width: 6rem; height: 6rem; border: 1px solid var(--color-separator); background-color: var(--color-surface); display: flex; align-items: center; justify-content: center; margin: 0 auto 1.5rem; }
.methodology__step-icon .material-icons { font-size: 1.875rem; }
.methodology__step-number { font-size: 0.75rem; font-weight: 700; color: var(--color-primary); text-transform: uppercase; letter-spacing: 0.15em; margin-bottom: 0.5rem; }
.methodology__step-title { font-size: 1.125rem; font-weight: 500; margin-bottom: 0.75rem; }
.methodology__step-text { font-size: 0.875rem; color: var(--color-text-muted); line-height: 1.7; }


/* ==================================================================
   11. PAGE EXPERTISE
   ================================================================== */
.workshop__grid { display: grid; grid-template-columns: 1fr; gap: 1px; background-color: var(--color-separator); border: 1px solid var(--color-separator); }
.workshop__card { background-color: var(--color-bg); padding: 2rem; position: relative; }
.workshop__badge { display: inline-block; background-color: var(--color-primary); color: var(--color-text-white); font-size: 0.75rem; padding: 0.25rem 0.5rem; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 1.5rem; }
.workshop__card-image { aspect-ratio: 4/3; overflow: hidden; margin-bottom: 2rem; }
.workshop__card-image img { width: 100%; height: 100%; object-fit: cover; }
.workshop__card-title { font-size: 1.25rem; font-weight: 500; margin-bottom: 0.75rem; }
.workshop__card-text { font-size: 0.875rem; color: var(--color-text-muted); line-height: 1.7; }
.workshop__specs { margin-top: 1.5rem; border-top: 1px solid var(--color-separator); padding-top: 1rem; }
.workshop__spec-row { display: flex; justify-content: space-between; font-size: 0.875rem; font-weight: 500; padding: 0.25rem 0; }
.workshop__spec-link { color: var(--color-primary); text-decoration: underline; text-underline-offset: 3px; transition: color 0.3s ease; }
.workshop__spec-link:hover { color: var(--color-primary-hover); }

.iso-banner { height: 8rem; position: relative; overflow: hidden; background-color: var(--color-primary); }
.iso-banner img { width: 100%; height: 100%; object-fit: cover; opacity: 0.2; mix-blend-mode: overlay; }
.iso-banner__content { position: absolute; inset: 0; display: flex; flex-direction: row; align-items: center; justify-content: center; gap: 1rem; color: var(--color-text-white); text-align: center; }
.iso-banner__content .material-icons { font-size: 1.75rem; opacity: 0.8; }
.iso-banner__content h3 { font-size: 1.125rem; font-weight: 300; text-transform: uppercase; letter-spacing: 0.15em; }

.standards { padding: var(--section-padding) 0; background-color: var(--color-surface); }
.standards__grid { display: grid; grid-template-columns: 1fr; gap: 3rem; }
.standards__intro-title { font-size: 1.875rem; font-weight: 400; margin-bottom: 1.5rem; line-height: 1.2; }
.standards__intro-text { font-size: 0.875rem; color: var(--color-text-muted); line-height: 1.7; margin-bottom: 2rem; }
.standards__accent-line { width: 3rem; height: 4px; background-color: var(--color-primary); }
.standards__cards { display: grid; grid-template-columns: 1fr; gap: 2rem; }
.standard-card { display: flex; gap: 1rem; }
.standard-card__icon { flex-shrink: 0; width: 3rem; height: 3rem; border: 1px solid var(--color-separator); display: flex; align-items: center; justify-content: center; color: var(--color-primary); background-color: var(--color-bg); }
.standard-card__title { font-size: 1.125rem; font-weight: 500; margin-bottom: 0.5rem; }
.standard-card__text { font-size: 0.875rem; color: var(--color-text-muted); line-height: 1.6; }

.service-area { border-top: 1px solid var(--color-separator); border-bottom: 1px solid var(--color-separator); }
.service-area__grid { display: grid; grid-template-columns: 1fr; }
.service-area__content { padding: 3rem 1.5rem; background-color: var(--color-bg); }
.service-area__badge { font-size: 0.75rem; font-weight: 600; color: var(--color-primary); text-transform: uppercase; letter-spacing: 0.15em; margin-bottom: 1rem; }
.service-area__title { font-size: 1.875rem; font-weight: 500; margin-bottom: 1.5rem; }
.service-area__text { font-size: 1rem; color: var(--color-text-muted); margin-bottom: 2rem; max-width: 28rem; line-height: 1.7; }
.service-area__list-item { display: flex; align-items: center; gap: 0.75rem; font-size: 0.875rem; font-weight: 500; margin-bottom: 1rem; }
.service-area__dot { width: 0.5rem; height: 0.5rem; border-radius: 50%; background-color: var(--color-primary); flex-shrink: 0; }
.service-area__dot--outline { background-color: transparent; border: 1px solid var(--color-primary); }
.service-area__image { min-height: 300px; position: relative; }
.service-area__image img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }


/* ==================================================================
   12. PAGE SERVICES & FAQ
   ================================================================== */
.service-block { display: grid; grid-template-columns: 1fr; gap: 3rem; align-items: center; }
.service-block__image-wrapper { position: relative; display: block; }
.service-block__corner { display: none; position: absolute; width: 6rem; height: 6rem; }
.service-block__corner--top-left { top: -1rem; left: -1rem; border-top: 1px solid var(--color-primary-30); border-left: 1px solid var(--color-primary-30); }
.service-block__corner--bottom-right { bottom: -1rem; right: -1rem; border-bottom: 1px solid var(--color-primary-30); border-right: 1px solid var(--color-primary-30); }
.service-block__image { width: 100%; height: 500px; object-fit: cover; filter: grayscale(100%); transition: filter 0.7s ease; }
.service-block__image:hover { filter: grayscale(0%); }
.service-block__number { position: absolute; padding: 1rem; border: 1px solid var(--color-separator); background-color: var(--color-bg); font-size: 2.5rem; font-weight: 700; color: var(--color-separator); opacity: 0.5; }
.service-block__number--bottom-right { bottom: 0; right: 0; }
.service-block__number--top-left { top: 0; left: 0; }
.service-block__title { font-size: 1.875rem; font-weight: 300; margin-bottom: 1.5rem; }
.service-block__text { font-size: 1rem; color: var(--color-text-muted); line-height: 1.7; font-weight: 300; margin-bottom: 2rem; }
.service-block__details { border-left: 1px solid var(--color-separator); padding-left: 1.5rem; }
.service-block__detail-label { font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.15em; color: var(--color-primary); margin-bottom: 0.5rem; }
.service-block__detail-list { font-size: 0.875rem; color: var(--color-text-muted); margin-bottom: 1.5rem; }
.service-block__detail-list li { margin-bottom: 0.25rem; }
.service-block__tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.5rem; }
.tag { padding: 0.25rem 0.5rem; font-size: 0.75rem; border: 1px solid var(--color-separator); background-color: var(--color-surface); color: var(--color-text-muted); }
.service-block__link { display: inline-flex; align-items: center; gap: 0.5rem; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.15em; transition: color 0.3s ease; }
.service-block__link:hover { color: var(--color-primary); }
.service-block__link .material-icons { font-size: 1rem; transition: transform 0.3s ease; }
.service-block__link:hover .material-icons { transform: translateX(4px); }

/* ========== SERVICES OVERVIEW ========== */
.services-overview { padding: var(--section-padding) 0; background-color: var(--color-bg); border-bottom: 1px solid var(--color-separator); }
.services-overview__header { max-width: 52rem; margin-bottom: 4rem; }
.services-overview__badge { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.15em; color: var(--color-primary); margin-bottom: 1rem; display: flex; align-items: center; gap: 0.75rem; }
.services-overview__badge::before { content: ''; width: 3rem; height: 1px; background-color: var(--color-primary); flex-shrink: 0; }
.services-overview__title { font-size: 2rem; font-weight: 300; line-height: 1.2; margin-bottom: 1.5rem; }
.services-overview__title em { font-style: normal; font-weight: 600; color: var(--color-text-muted); }
.services-overview__lead { font-size: 1rem; color: var(--color-text-muted); line-height: 1.8; font-weight: 300; max-width: 48rem; }
.services-overview__grid { display: grid; grid-template-columns: 1fr; gap: 1rem; margin-bottom: 2.5rem; }
.services-overview__card { padding: 2rem 1.75rem; border: 1px solid var(--color-separator); background-color: var(--color-surface); }
.services-overview__card-icon { color: var(--color-primary); font-size: 1.5rem; margin-bottom: 1rem; display: block; }
.services-overview__card-title { font-size: 1rem; font-weight: 600; margin-bottom: 0.5rem; letter-spacing: 0.01em; }
.services-overview__card-text { font-size: 0.875rem; color: var(--color-text-muted); line-height: 1.7; font-weight: 300; }
.services-overview__disclaimer { display: flex; align-items: flex-start; gap: 0.75rem; padding: 1.25rem 1.5rem; border: 1px solid var(--color-separator); background-color: var(--color-surface); }
.services-overview__disclaimer .material-icons { color: var(--color-primary); font-size: 1.125rem; flex-shrink: 0; margin-top: 0.1rem; }
.services-overview__disclaimer p { font-size: 0.8125rem; color: var(--color-text-muted); line-height: 1.7; font-weight: 300; }

.faq { padding: var(--section-padding) 0; background-color: var(--color-surface); border-top: 1px solid var(--color-separator); }
.faq__header { text-align: center; margin-bottom: 4rem; }
.faq__badge { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.15em; color: var(--color-primary); margin-bottom: 1rem; }
.faq__title { font-size: 1.875rem; font-weight: 300; }
.faq__list { max-width: 48rem; margin: 0 auto; }
.faq__item { border: 1px solid var(--color-separator); background-color: var(--color-bg); margin-bottom: 1rem; }
.faq__question { display: flex; align-items: center; justify-content: space-between; padding: 1.5rem; cursor: pointer; font-weight: 500; list-style: none; }
.faq__question::-webkit-details-marker { display: none; }
.faq__question .material-icons { color: var(--color-primary); transition: transform 0.3s ease; }
.faq__item[open] .faq__question .material-icons { transform: rotate(180deg); }
.faq__answer { padding: 0 1.5rem 1.5rem; font-size: 0.875rem; color: var(--color-text-muted); line-height: 1.7; font-weight: 300; }


/* ==================================================================
   13. PAGE PROJETS
   ================================================================== */
.filter-bar { position: sticky; top: var(--navbar-height); z-index: 40; background-color: var(--color-bg); padding: 1rem 0; margin-bottom: 2.5rem; border-bottom: 1px solid var(--color-separator); overflow-x: auto; -ms-overflow-style: none; scrollbar-width: none; }
.filter-bar::-webkit-scrollbar { display: none; }
.filter-bar__inner { display: flex; gap: 0.5rem; min-width: max-content; }
.filter-btn { padding: 0.5rem 1.25rem; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.1em; font-weight: 500; border: 1px solid var(--color-separator); background-color: transparent; color: var(--color-text-muted); cursor: pointer; transition: all 0.3s ease; white-space: nowrap; }
.filter-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.filter-btn--active { background-color: var(--color-primary); color: var(--color-text-white); border-color: var(--color-primary); }
.filter-btn--active:hover { color: var(--color-text-white); }

.projects-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; }
.project-card { cursor: pointer; }
.project-card__image { display: block; position: relative; aspect-ratio: 4/5; overflow: hidden; border: 1px solid var(--color-separator); margin-bottom: 1.25rem; }
.project-card__image img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(100%); transition: transform 0.7s ease, filter 0.5s ease; }
.project-card:hover .project-card__image img { transform: scale(1.03); filter: grayscale(0%); }
.project-card__image-overlay { position: absolute; inset: 0; background-color: rgba(0,0,0,0.15); opacity: 0; transition: opacity 0.3s ease; }
.project-card:hover .project-card__image-overlay { opacity: 1; }
.project-card__info { display: flex; justify-content: space-between; align-items: flex-start; border-top: 1px solid var(--color-separator); padding-top: 1rem; }
.project-card__name { font-size: 1.25rem; margin-bottom: 0.25rem; transition: color 0.3s ease; }
.project-card:hover .project-card__name { color: var(--color-primary); }
.project-card__type { font-size: 0.875rem; color: var(--color-text-muted); }
.project-card__meta { text-align: right; font-size: 0.75rem; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.project-card__meta span { display: block; }
.projects__load-more { margin-top: 5rem; display: flex; justify-content: center; }
.projects__load-more-btn { display: inline-flex; flex-direction: column; align-items: center; gap: 0.5rem; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.15em; font-weight: 500; background: none; border: none; cursor: pointer; color: var(--color-text); transition: color 0.3s ease; }
.projects__load-more-btn:hover { color: var(--color-primary); }
.projects__load-more-btn .material-icons { font-size: 1.125rem; transition: transform 0.3s ease; }
.projects__load-more-btn:hover .material-icons { transform: translateY(4px); }


/* ==================================================================
   14. PAGE ÉTUDE DE CAS
   ================================================================== */
.case-hero { padding-top: 6rem; padding-bottom: 3rem; }
.case-hero__label { font-size: 0.75rem; font-weight: 500; text-transform: uppercase; letter-spacing: 0.15em; color: var(--color-text-muted); margin-bottom: 0.5rem; }
.case-hero__title-wrapper { border-left: 2px solid var(--color-primary); padding-left: 1.5rem; margin-bottom: 3rem; }
.case-hero__title { font-size: 2.5rem; font-weight: 300; line-height: 1.15; }
.case-hero__title strong { font-weight: 600; color: var(--color-primary); }
.case-hero__image { position: relative; aspect-ratio: 21/9; overflow: hidden; border: 1px solid var(--color-separator); }
.case-hero__image img { width: 100%; height: 100%; object-fit: cover; }
.case-hero__image-gradient { position: absolute; inset: 0; background: linear-gradient(to top, rgba(0,0,0,0.2), transparent); pointer-events: none; }

.case-content { padding: 3rem 0; }
.case-content__grid { display: grid; grid-template-columns: 1fr; gap: 3rem; }
.case-content__context-title { font-size: 1.5rem; font-weight: 300; padding-bottom: 1rem; border-bottom: 1px solid var(--color-separator); margin-bottom: 2rem; }
.case-content__context-text { font-size: 1.125rem; color: var(--color-text-muted); line-height: 1.8; font-weight: 300; }
.case-content__context-text p { margin-bottom: 1.5rem; }

.specs-card { background-color: var(--color-surface); padding: 2rem 2.5rem; border: 1px solid var(--color-separator); }
.specs-card__title { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.15em; color: var(--color-primary); margin-bottom: 2rem; }
.specs-card__row { display: flex; justify-content: space-between; align-items: baseline; padding-bottom: 0.75rem; margin-bottom: 0.75rem; border-bottom: 1px solid var(--color-separator); }
.specs-card__row:last-of-type { border-bottom: none; }
.specs-card__label { font-size: 0.875rem; color: var(--color-text-muted); }
.specs-card__value { font-size: 1rem; font-weight: 500; text-align: right; }
.specs-card__cta { margin-top: 2.5rem; }
.specs-card__cta .btn-outline { width: 100%; text-align: center; }

.case-gallery { padding: 5rem 0; background-color: var(--color-surface); border-top: 1px solid var(--color-separator); border-bottom: 1px solid var(--color-separator); }
.case-gallery__header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 3rem; }
.case-gallery__title { font-size: 1.5rem; font-weight: 300; }
.case-gallery__line { display: none; width: 6rem; height: 1px; background-color: var(--color-separator); }
.case-gallery__grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
.case-gallery__item { position: relative; aspect-ratio: 1/1; overflow: hidden; cursor: pointer; }
.case-gallery__item img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(100%); transition: transform 0.5s ease, filter 0.5s ease; }
.case-gallery__item:hover img { transform: scale(1.05); filter: grayscale(0%); }
.case-gallery__item-overlay { position: absolute; inset: 0; background-color: rgba(0,0,0,0.4); opacity: 0; transition: opacity 0.3s ease; display: flex; align-items: center; justify-content: center; }
.case-gallery__item:hover .case-gallery__item-overlay { opacity: 1; }
.case-gallery__item-label { color: var(--color-text-white); font-weight: 300; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.15em; border: 1px solid var(--color-text-white); padding: 0.5rem 1rem; }

/* Lightbox */
.lightbox-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.92); z-index: 2000; align-items: center; justify-content: center; cursor: zoom-out; }
.lightbox-overlay.is-open { display: flex; }
.lightbox-overlay img { max-width: 90vw; max-height: 90vh; object-fit: contain; border-radius: 2px; }
.lightbox-overlay__close { position: absolute; top: 1.25rem; right: 1.25rem; color: #fff; background: none; border: none; cursor: pointer; line-height: 1; }


/* ==================================================================
   15. PAGE CONTACT
   ================================================================== */
.contact-header { padding-top: 8rem; padding-bottom: 4rem; border-bottom: 1px solid var(--color-separator); background-color: var(--color-surface); position: relative; overflow: hidden; }
.contact-header__bg { position: absolute; inset: 0; pointer-events: none; opacity: 0.5; }
.contact-header__content { position: relative; z-index: 1; }
.contact-header__title { font-size: 3rem; font-weight: 300; letter-spacing: -0.03em; margin-bottom: 1.5rem; line-height: 1.1; }
.contact-header__title em { font-weight: 600; font-style: normal; color: var(--color-text-muted); }
.contact-header__text { font-size: 1.125rem; color: var(--color-text-muted); max-width: 36rem; font-weight: 300; line-height: 1.7; }

.contact-layout { display: grid; grid-template-columns: 1fr; min-height: 600px; }
.contact-form-area { padding: 2rem 1.5rem; background-color: var(--color-bg); }
.contact-form__section-label { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.2em; color: var(--color-text-muted); margin-bottom: 1rem; }
.contact-form__title { font-size: 1.5rem; font-weight: 500; margin-bottom: 0.5rem; }
.contact-form__subtitle { font-size: 0.875rem; color: var(--color-text-muted); margin-bottom: 3rem; }
.contact-form__fields { display: grid; grid-template-columns: 1fr; gap: 2rem; margin-bottom: 3rem; }
.form-group { display: flex; flex-direction: column; gap: 0.5rem; }
.form-group__label { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-text-muted); transition: color 0.3s ease; }
.form-group__input { border: none; border-bottom: 1px solid var(--color-separator); background-color: transparent; padding: 0.75rem 0; font-size: 1.125rem; color: var(--color-text); outline: none; transition: border-color 0.3s ease; }
.form-group__input:focus { border-bottom-color: var(--color-primary); }
.form-group:focus-within .form-group__label { color: var(--color-primary); }

.contact-form__services { margin-bottom: 3rem; }
.contact-form__services-label { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-text-muted); margin-bottom: 1.5rem; }
.contact-form__services-grid { display: grid; grid-template-columns: 1fr; gap: 1rem; }
.radio-card { cursor: pointer; }
.radio-card input[type="radio"] { position: absolute; opacity: 0; width: 0; height: 0; }
.radio-card__content { padding: 1.5rem; border: 1px solid var(--color-separator); display: flex; flex-direction: column; gap: 1rem; transition: all 0.3s ease; }
.radio-card__content:hover { border-color: var(--color-primary); }
.radio-card input[type="radio"]:checked + .radio-card__content { background-color: var(--color-primary); border-color: var(--color-primary); color: var(--color-text-white); }
.radio-card input[type="radio"]:checked + .radio-card__content .material-icons { color: var(--color-text-white); }
.radio-card__content .material-icons { font-size: 2rem; color: var(--color-text-muted); transition: color 0.3s ease; }
.radio-card__content:hover .material-icons { color: var(--color-primary); }
.radio-card__name { font-size: 1.125rem; font-weight: 500; }

.contact-form__textarea { margin-bottom: 3rem; }
.contact-form__textarea textarea { width: 100%; border: 1px solid var(--color-separator); background-color: var(--color-surface); padding: 1rem; font-size: 1rem; color: var(--color-text); resize: none; outline: none; transition: border-color 0.3s ease; }
.contact-form__textarea textarea:focus { border-color: var(--color-primary); }
.contact-form__submit { display: flex; flex-direction: column; gap: 1rem; align-items: stretch; padding-top: 1.5rem; border-top: 1px solid var(--color-separator); }
.contact-form__submit-info { font-size: 0.875rem; color: var(--color-text-muted); display: flex; align-items: center; gap: 0.25rem; }
.contact-form__submit-info .material-icons { font-size: 0.875rem; }

.contact-sidebar { background-color: var(--color-surface); display: flex; flex-direction: column; }

/* Carte pleine largeur en séparateur */
.contact-map-separator { width: 100%; height: 28rem; overflow: hidden; filter: grayscale(100%); transition: filter 0.7s ease; }
.contact-map-separator:hover { filter: grayscale(0%); }
.contact-map-separator iframe { width: 100%; height: 100%; border: none; display: block; }
.contact-sidebar__blocks { flex-grow: 1; display: flex; flex-direction: column; }
.contact-sidebar__block { padding: 2rem 2.5rem; border-bottom: 1px solid var(--color-separator); transition: background-color 0.3s ease; }
.contact-sidebar__block:last-child { border-bottom: none; flex-grow: 1; }
.contact-sidebar__block:hover { background-color: var(--color-bg); }
.contact-sidebar__block-inner { display: flex; align-items: flex-start; gap: 1rem; }
.contact-sidebar__block-inner .material-icons { color: var(--color-text-muted); margin-top: 0.15rem; }
.contact-sidebar__block-title { font-size: 1.125rem; font-weight: 500; margin-bottom: 0.25rem; }
.contact-sidebar__block-text { font-size: 0.875rem; color: var(--color-text-muted); line-height: 1.7; }
.contact-sidebar__block-text a { transition: color 0.3s ease; }
.contact-sidebar__block-text a:hover { color: var(--color-primary); }
.hours-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; font-size: 0.875rem; margin-top: 0.5rem; }
.hours-grid__day { color: var(--color-text-muted); }
.hours-grid__time { text-align: right; font-weight: 500; color: var(--color-text); }


/* --- Contact Page Footer (simplified variant) --- */
.footer--simple { padding-top: 3rem; padding-bottom: 3rem; }
.footer--simple .footer__row {
  display: flex; flex-direction: column; gap: 2rem; align-items: flex-start;
}

/* ==================================================================
   16. MEDIA QUERIES
   ================================================================== */

/* --- TABLETTE (768px+) --- */
@media (min-width: 768px) {
  .navbar__links { display: flex; }
  .navbar__mobile-btn { display: none; }
  .page-header__grid { grid-template-columns: 2fr 1fr; }
  .page-header__title { font-size: 3.75rem; }
  .expertise-section__header { flex-direction: row; justify-content: space-between; align-items: flex-end; }
  .expertise-section__view-all { display: flex; margin-top: 0; }
  .expertise-section__grid { grid-template-columns: repeat(3,1fr); }
  .services-overview__grid { grid-template-columns: repeat(2,1fr); }
  .stats__grid { grid-template-columns: repeat(4,1fr); }
  .stats__item { text-align: left; }
  .stats__item:nth-child(-n+2) { border-bottom: none; }
  .stats__item:nth-child(2n) { border-right: 1px solid var(--color-separator); }
  .stats__item:last-child { border-right: none; }
  .works__card { min-width: 600px; }
  .methodology__steps { grid-template-columns: repeat(4,1fr); }
  .methodology__connector { display: block; }
  .methodology__step { text-align: left; border-bottom: none; }
  .methodology__step-icon { margin: 0 0 1.5rem 0; }
  .footer__grid { grid-template-columns: repeat(2,1fr); }
  .footer__bottom { flex-direction: row; justify-content: space-between; }
  .workshop__grid { grid-template-columns: repeat(2,1fr); }
  .workshop__card { padding: 3rem; }
  .standards__cards { grid-template-columns: repeat(2,1fr); }
  .service-area__grid { grid-template-columns: 1fr 1fr; }
  .service-area__content { padding: 6rem 4rem 6rem 8rem; }
  .service-block { grid-template-columns: 1fr 1fr; }
  .service-block__corner { display: block; }
  .projects-grid { grid-template-columns: repeat(2,1fr); }
  .case-gallery__grid { grid-template-columns: repeat(3,1fr); }
  .case-gallery__grid--4col { grid-template-columns: repeat(4,1fr); }
  .case-gallery__line { display: block; }
  .case-hero__title { font-size: 3.5rem; }
  .contact-form__fields { grid-template-columns: 1fr 1fr; }
  .contact-form__services-grid { grid-template-columns: repeat(3,1fr); }
  .contact-form__submit { flex-direction: row; justify-content: space-between; align-items: center; }
  .cta-section__title { font-size: 2.5rem; }
}

/* --- DESKTOP (1024px+) --- */
@media (min-width: 1024px) {
  .hero__content { grid-template-columns: 7fr 5fr; }
  .hero__title { font-size: 4.5rem; }
  .page-header__title { font-size: 4.5rem; }
  .page-header__inner { grid-template-columns: 7fr 5fr; }
  .footer__grid { grid-template-columns: 1.5fr 0.7fr 1fr 1fr; }
  .services-overview__grid { grid-template-columns: repeat(4,1fr); }
  .standards__grid { grid-template-columns: 1fr 2fr; }
  .projects-grid { grid-template-columns: repeat(3,1fr); }
  .case-content__grid { grid-template-columns: 7fr 5fr; gap: 6rem; }
  .specs-card { position: sticky; top: 6rem; }
  .contact-layout { grid-template-columns: 2fr 1fr; gap: 3rem; }
  .contact-form-area { padding: 3rem 0; }
  .contact-header__title { font-size: 4.5rem; }
  .footer--simple .footer__row { flex-direction: row; justify-content: space-between; align-items: flex-end; }
  .cta-section__title { font-size: 3rem; }
}

/* --- MOBILE (<768px) --- */
@media (max-width: 767px) {
  .navbar__links { display: none; flex-direction: column; gap: 0; position: absolute; top: var(--navbar-height); left: 0; right: 0; background-color: var(--color-bg); border-top: 1px solid var(--color-separator); z-index: 99; }
  .navbar__links.is-open { display: flex; }
  .navbar__link { padding: 1rem 1.5rem; border-bottom: 1px solid var(--color-separator); font-size: 0.80rem; color: var(--color-text); }
  .navbar__link:hover { color: var(--color-primary); }
  .navbar__link--active { color: var(--color-primary); border-bottom-color: var(--color-primary); }
  .navbar__mobile-btn { display: block; }
  .navbar { position: relative; }
  .page-header__icon-badge .material-icons { font-size: 1.9375rem; }
}