:root {
  --color-black: #080808;
  --color-dark: #111111;
  --color-dark-soft: #1a1a1a;
  --color-white: #ffffff;
  --color-light: #f5f2ed;
  --color-muted: #b8b8b8;
  --color-gold: #c9972b;
  --color-gold-soft: #e0b85a;

  --font-main: Arial, Helvetica, sans-serif;

  --container-width: 1180px;
  --radius: 18px;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-main);
  color: var(--color-dark);
  background: var(--color-light);
  line-height: 1.6;
}

img,
video {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(100% - 32px, var(--container-width));
  margin: 0 auto;
}

/* ========================================
   HEADER
======================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 20;
  background: rgba(8, 8, 8, 0.88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(201, 151, 43, 0.25);
}

.header-inner {
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo img {
  width: 170px;
  height: auto;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--color-white);
  font-size: 0.92rem;
}

.main-nav a {
  opacity: 0.9;
  transition: color 0.2s ease, opacity 0.2s ease;
}

.main-nav a:hover {
  color: var(--color-gold-soft);
  opacity: 1;
}

.nav-cta {
  padding: 11px 18px;
  border: 1px solid var(--color-gold);
  color: var(--color-gold-soft);
  border-radius: 999px;
}

.menu-toggle {
  display: none;
  border: 0;
  background: transparent;
  color: var(--color-white);
  font-size: 2rem;
  cursor: pointer;
}

/* ========================================
   HERO
======================================== */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  color: var(--color-white);
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.88), rgba(0, 0, 0, 0.35)),
    url("assets/images/hero.jpg") center / cover no-repeat;
  padding-top: 90px;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 50%, rgba(201, 151, 43, 0.16), transparent 35%);
}

.hero-content {
  position: relative;
  max-width: 820px;
}

.brand-name {
  color: var(--color-gold-soft);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 2.4rem;
  font-weight: 800;
  margin: 0 0 20px;
}

.section-kicker {
  color: var(--color-gold-soft);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  font-weight: 700;
  margin: 0 0 14px;
}

h1,
h2,
h3 {
  line-height: 1.1;
  margin: 0;
}

h1 {
  font-size: clamp(1.8rem, 4vw, 3.2rem);
  max-width: 920px;
  text-transform: uppercase;
}

h1 span {
  color: var(--color-gold-soft);
}

h2 {
  font-size: clamp(2rem, 4vw, 3.6rem);
  margin-bottom: 22px;
}

h3 {
  font-size: 1.25rem;
  margin-bottom: 10px;
}

.hero-text {
  max-width: 680px;
  font-size: clamp(1rem, 1.8vw, 1.25rem);
  color: #eeeeee;
  margin: 26px 0 34px;
}

.hero-actions,
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* ========================================
   BOUTONS
======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 13px 22px;
  border-radius: 999px;
  font-weight: 700;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, border 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--color-gold);
  color: var(--color-black);
}

.btn-secondary {
  border-color: rgba(255, 255, 255, 0.65);
  color: var(--color-white);
}

/* ========================================
   SECTIONS
======================================== */

.section {
  padding: 96px 0;
}

.dark-section {
  background: var(--color-black);
  color: var(--color-white);
}

.section-heading {
  max-width: 850px;
  margin-bottom: 46px;
}

.section-heading p,
.intro-section p {
  font-size: 1.05rem;
}

.two-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.image-card {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.image-card img {
  width: 100%;
  height: auto;
  object-fit: contain;
}

/* ========================================
   APPLICATIONS
======================================== */

.cards-grid,
.commitments-grid,
.trust-grid {
  display: grid;
  gap: 22px;
}

.applications-grid {
  grid-template-columns: repeat(3, 1fr);
}

.card {
  background: var(--color-dark-soft);
  border: 1px solid rgba(201, 151, 43, 0.22);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.card-content {
  padding: 22px;
}

.card-content p,
.step p,
.quality-box p {
  color: var(--color-muted);
}

/* ========================================
   RÉALISATIONS
======================================== */

.filter-btn {
  border: 1px solid rgba(17, 17, 17, 0.2);
  background: transparent;
  border-radius: 999px;
  padding: 10px 16px;
  cursor: pointer;
  font-weight: 700;
}

.filter-btn.active {
  background: var(--color-black);
  color: var(--color-white);
  border-color: var(--color-black);
}

.gallery-grid {
  margin-top: 30px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 220px;
  gap: 16px;
}

.project-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--color-dark);
  box-shadow: var(--shadow);
}

.project-card.large {
  grid-column: span 2;
  grid-row: span 2;
}

.project-card img,
.project-card video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-overlay {
  position: absolute;
  inset: auto 0 0;
  padding: 22px;
  color: var(--color-white);
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.85));
}

.project-overlay h3 {
  margin: 0 0 4px;
}

.project-overlay p {
  margin: 0;
  color: var(--color-gold-soft);
}

/* ========================================
   MÉTHODE
======================================== */

.steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}

.step {
  background: var(--color-dark-soft);
  border: 1px solid rgba(201, 151, 43, 0.25);
  border-radius: var(--radius);
  padding: 24px;
}

.step span {
  display: inline-block;
  color: var(--color-gold-soft);
  font-weight: 800;
  margin-bottom: 18px;
}

.quality-box {
  margin-top: 30px;
  padding: 34px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(201, 151, 43, 0.22), rgba(255, 255, 255, 0.04));
  border: 1px solid rgba(201, 151, 43, 0.35);
}

/* ========================================
   ENGAGEMENTS
======================================== */

.commitments-grid {
  grid-template-columns: repeat(4, 1fr);
}

.commitments-grid article {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
}

/* ========================================
   CONFIANCE
======================================== */

.trust-section {
  background: var(--color-dark);
  color: var(--color-white);
}

.trust-grid {
  grid-template-columns: repeat(4, 1fr);
}

.trust-grid span {
  border: 1px solid rgba(201, 151, 43, 0.28);
  border-radius: var(--radius);
  padding: 22px;
  text-align: center;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.04);
}

/* ========================================
   FAQ
======================================== */

.faq-list {
  display: grid;
  gap: 14px;
}

details {
  background: var(--color-dark-soft);
  border: 1px solid rgba(201, 151, 43, 0.25);
  border-radius: var(--radius);
  padding: 20px 24px;
}

summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--color-white);
}

details p {
  color: var(--color-muted);
  margin-bottom: 0;
}

/* ========================================
   CONTACT
======================================== */

.contact-section {
  background: var(--color-light);
}

.contact-details {
  margin-top: 28px;
}

.contact-details a {
  color: var(--color-gold);
  font-weight: 700;
}

.contact-form {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 16px;
}

.contact-form label {
  display: grid;
  gap: 6px;
  font-weight: 700;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  border: 1px solid #d8d8d8;
  border-radius: 12px;
  padding: 13px 14px;
  font: inherit;
}

.contact-form textarea {
  resize: vertical;
}

/* ========================================
   FOOTER
======================================== */

.site-footer {
  background: var(--color-black);
  color: var(--color-white);
  padding: 42px 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 30px;
}

.site-footer p {
  color: var(--color-muted);
}

.site-footer a {
  color: var(--color-gold-soft);
}

/* ========================================
   PAGE MERCI
======================================== */

.thank-you-section {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: var(--color-dark);
  color: var(--color-white);
}

.thank-you-content {
  max-width: 600px;
}

.thank-you-content h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  margin-bottom: 24px;
}

.thank-you-content p {
  font-size: 1.15rem;
  color: var(--color-muted);
  margin-bottom: 32px;
}

/* ========================================
   RESPONSIVE
======================================== */

@media (max-width: 980px) {
  .menu-toggle {
    display: block;
  }

  .main-nav {
    position: absolute;
    top: 82px;
    right: 16px;
    left: 16px;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
    background: var(--color-black);
    border: 1px solid rgba(201, 151, 43, 0.28);
    border-radius: var(--radius);
  }

  .main-nav.is-open {
    display: flex;
  }

  .two-columns,
  .applications-grid,
  .commitments-grid,
  .trust-grid {
    grid-template-columns: 1fr 1fr;
  }

  .steps {
    grid-template-columns: 1fr 1fr;
  }

  .gallery-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 680px) {
  .section {
    padding: 72px 0;
  }

  .hero {
    min-height: 92vh;
  }

  .brand-name {
    font-size: 1.8rem;
  }

  h1 {
    font-size: 1.5rem;
  }

  .two-columns,
  .applications-grid,
  .commitments-grid,
  .trust-grid,
  .steps,
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .project-card.large {
    grid-column: span 1;
    grid-row: span 1;
  }

  .gallery-grid {
    grid-auto-rows: 260px;
  }

  .footer-inner {
    flex-direction: column;
  }
}

.svg-icon {
  width: 18px;
  height: 18px;
}

.social-link.icon-only .svg-icon {
  color: var(--color-gold-soft);
}

.footer-socials .social-link {
  background: rgba(255, 255, 255, 0.04);
  color: var(--color-white);
}

.footer-socials .social-link:hover {
  color: var(--color-gold-soft);
}