/* ============================================================
   CARRELART — STYLES
   Design System: "The Monolith"
   Mobile-first | Breakpoints: 768px / 1024px
   ============================================================ */

/* ── 1. DESIGN TOKENS ─────────────────────────────────────── */
:root {
  /* Colors */
  --c-bg:          #131313;
  --c-surface-lo:  #1b1b1b;
  --c-surface:     #1f1f1f;
  --c-surface-hi:  #2a2a2a;
  --c-surface-top: #353535;
  --c-surface-bot: #0e0e0e;
  --c-primary:     #fe5545;
  --c-primary-lt:  #ffb4a9;
  --c-text:        #e2e2e2;
  --c-text-muted:  rgba(226,226,226,0.55);
  --c-outline:     #aa8984;
  --c-outline-var: #5b403c;

  /* Typography */
  --f-headline: 'Space Grotesk', sans-serif;
  --f-body:     'Manrope', sans-serif;

  /* Spacing scale (from DESIGN.md) */
  --sp-4:  1.4rem;
  --sp-8:  2.75rem;
  --sp-16: 5.5rem;
  --sp-24: 8.5rem;

  /* Misc */
  --radius: 0px;
  --header-h: 72px;
  --transition: 0.25s ease;
}

/* ── 2. RESET & BASE ──────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--c-bg);
  color: var(--c-text);
  font-family: var(--f-body);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--f-headline);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

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

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

ul {
  list-style: none;
}

button {
  cursor: pointer;
  background: none;
  border: none;
  font-family: inherit;
}

::selection {
  background: var(--c-primary);
  color: #5c0001;
}

/* ── 3. LAYOUT UTILITIES ──────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.text-accent {
  color: var(--c-primary);
}

/* ── 4. BUTTONS ───────────────────────────────────────────── */
.btn {
  display: inline-block;
  font-family: var(--f-headline);
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: var(--sp-4) 2.5rem;
  border-radius: var(--radius);
  transition: background-color var(--transition), transform var(--transition), letter-spacing var(--transition);
  cursor: pointer;
  border: none;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--c-primary);
  color: #5c0001;
}

.btn-primary:hover {
  background-color: var(--c-primary-lt);
  letter-spacing: 0.14em;
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-full {
  width: 100%;
  text-align: center;
}

/* ── 5. SECTION HEADERS ───────────────────────────────────── */
.section-header {
  margin-bottom: var(--sp-8);
}

.section-label {
  display: block;
  font-family: var(--f-headline);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: var(--c-primary);
  margin-bottom: 0.75rem;
}

.section-header h2 {
  font-size: clamp(2rem, 5vw, 3rem);
  text-transform: uppercase;
}

/* ── 6. FADE-IN ANIMATIONS ────────────────────────────────── */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-section {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.fade-in-section.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Hero staggered fade-in items */
.fade-in-item {
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards;
}

.hero-content .fade-in-item:nth-child(1) { animation-delay: 0.1s; }
.hero-content .fade-in-item:nth-child(2) { animation-delay: 0.35s; }
.hero-content .fade-in-item:nth-child(3) { animation-delay: 0.55s; }
.hero-content .fade-in-item:nth-child(4) { animation-delay: 0.75s; }

/* ── 7. HEADER ────────────────────────────────────────────── */
#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: transparent;
  transition: background-color var(--transition), backdrop-filter var(--transition);
}

#site-header.scrolled {
  background-color: rgba(19, 19, 19, 0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding-inline: 1.5rem;
  max-width: 1200px;
  margin-inline: auto;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.logo-img {
  height: 36px;
  width: auto;
}

/* Desktop nav */
#main-nav {
  display: none;
  gap: 2.5rem;
}

#main-nav a {
  font-family: var(--f-headline);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--c-text-muted);
  transition: color var(--transition);
}

#main-nav a:hover {
  color: var(--c-primary);
}

.header-cta {
  display: none;
  font-size: 0.72rem;
  padding: 0.75rem 1.5rem;
}

/* Hamburger */
#hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 36px;
  padding: 4px;
  z-index: 110;
}

#hamburger span {
  display: block;
  width: 100%;
  height: 1.5px;
  background-color: var(--c-text);
  transition: transform var(--transition), opacity var(--transition);
  transform-origin: center;
}

#hamburger.open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
#hamburger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
#hamburger.open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* Mobile nav overlay */
#main-nav.nav-open {
  display: flex;
  flex-direction: column;
  position: fixed;
  inset: 0;
  background: var(--c-bg);
  justify-content: center;
  align-items: center;
  gap: 3rem;
  z-index: 105;
}

#main-nav.nav-open a {
  font-size: 2rem;
  letter-spacing: -0.02em;
  color: var(--c-text);
}

#main-nav.nav-open a:hover {
  color: var(--c-primary);
}

/* ── 8. HERO ──────────────────────────────────────────────── */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-h);
  padding-bottom: 1.5rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    to bottom,
    rgba(19,19,19,0.55) 0%,
    rgba(19,19,19,0.85) 60%,
    rgba(19,19,19,1) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.hero-content h1 {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: -0.03em;
  max-width: 680px;
  margin-bottom: 1.5rem;
}

.hero-content p {
  font-size: 1.05rem;
  font-weight: 300;
  color: var(--c-text-muted);
  max-width: 520px;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.badge {
  display: inline-block;
  font-family: var(--f-headline);
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--c-text-muted);
  border: 1px solid rgba(226,226,226,0.15);
  padding: 0.45rem 1rem;
}

/* ── 9. SERVICES ──────────────────────────────────────────── */
#services {
  padding-block: var(--sp-16);
  background: var(--c-bg);
}

.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-8);
}

.service-card {
  background: var(--c-surface);
  padding: 2.5rem;
  border-left: 3px solid transparent;
  transition: border-color var(--transition), background-color var(--transition), transform var(--transition);
  position: relative;
}

.service-card:first-child {
  border-left-color: var(--c-primary);
}

.service-card:hover {
  border-left-color: var(--c-primary);
  background: var(--c-surface-hi);
  transform: translateY(-3px);
}

.service-icon {
  margin-bottom: 1.75rem;
}

.service-card h3 {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.75rem;
  color: var(--c-text);
}

.service-card p {
  font-size: 0.9rem;
  color: var(--c-text-muted);
  line-height: 1.65;
}

/* ── 10. RÉALISATIONS ─────────────────────────────────────── */
#realisations {
  padding-block: var(--sp-16);
  background: var(--c-surface-bot);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
}

.gallery-item {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  cursor: pointer;
}

.gallery-placeholder {
  position: absolute;
  inset: 0;
  transition: transform 0.5s ease;
}

.gallery-placeholder svg {
  width: 100%;
  height: 100%;
}

.gallery-item:hover .gallery-placeholder {
  transform: scale(1.06);
}

.gallery-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 0.5s ease;
}

.gallery-item:hover .gallery-img {
  transform: scale(1.06);
}

.gallery-overlay {
  position: absolute;
  inset: 0;
  background: rgba(19,19,19,0.72);
  display: flex;
  align-items: flex-end;
  padding: 1.25rem;
  opacity: 0;
  transition: opacity var(--transition);
}

.gallery-item:hover .gallery-overlay {
  opacity: 1;
}

.gallery-overlay span {
  font-family: var(--f-body);
  font-style: italic;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--c-text);
  letter-spacing: 0.04em;
}

/* ── 11. POURQUOI ─────────────────────────────────────────── */
#pourquoi {
  padding-block: var(--sp-16);
  background: var(--c-surface-lo);
}

.pourquoi-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

.pourquoi-item {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}

.pourquoi-icon {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  background: var(--c-surface);
  display: flex;
  align-items: center;
  justify-content: center;
}

.pourquoi-text h3 {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
  color: var(--c-text);
}

.pourquoi-text p {
  font-size: 0.9rem;
  color: var(--c-text-muted);
  line-height: 1.65;
}

/* ── 12. TÉMOIGNAGES ──────────────────────────────────────── */
#temoignages {
  padding-block: var(--sp-16);
  background: var(--c-bg);
}

.temoignages-wrapper {
  overflow: hidden;
}

.temoignages-track {
  display: flex;
  gap: 1.5rem;
  transition: transform 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.temoignage-card {
  flex: 0 0 100%;
  background: var(--c-surface);
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.stars {
  display: block;
}

.temoignage-card blockquote {
  font-size: 1rem;
  font-weight: 400;
  font-style: italic;
  color: var(--c-text);
  line-height: 1.75;
  flex: 1;
}

.temoignage-card cite {
  font-family: var(--f-headline);
  font-style: normal;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--c-primary);
}

.temoignages-dots {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 2rem;
}

.dot {
  width: 28px;
  height: 3px;
  background: rgba(226,226,226,0.2);
  border-radius: var(--radius);
  transition: background-color var(--transition), width var(--transition);
}

.dot.active {
  background: var(--c-primary);
  width: 48px;
}

/* ── 13. FORMULAIRE ───────────────────────────────────────── */
#formulaire {
  padding-block: var(--sp-16);
  background: var(--c-surface-lo);
}

.formulaire-inner {
  max-width: 720px;
  margin-inline: auto;
}

.formulaire-subtitle {
  font-size: 1rem;
  color: var(--c-text-muted);
  margin-top: 0.75rem;
  font-weight: 300;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.form-group:last-of-type {
  margin-bottom: 0;
}

.form-group label {
  font-family: var(--f-headline);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--c-primary);
}

.required {
  color: var(--c-primary);
}

.optional {
  color: var(--c-text-muted);
  text-transform: none;
  font-family: var(--f-body);
  font-weight: 400;
  font-size: 0.75rem;
  letter-spacing: 0;
}

.form-group input,
.form-group select,
.form-group textarea {
  font-family: var(--f-body);
  font-size: 0.95rem;
  color: var(--c-text);
  background: var(--c-surface);
  border: 1px solid rgba(170, 137, 132, 0.15);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  min-height: 44px;
  outline: none;
  transition: border-color var(--transition);
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(226,226,226,0.22);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: transparent;
  border-bottom-color: var(--c-primary);
  box-shadow: 0 1px 0 0 var(--c-primary);
}

.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23aa8984' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
  cursor: pointer;
}

.form-group select option {
  background: var(--c-surface-hi);
  color: var(--c-text);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* File upload */
.file-drop {
  position: relative;
}

.file-drop input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
  z-index: 1;
}

.file-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  min-height: 120px;
  border: 1px dashed rgba(170, 137, 132, 0.25);
  background: rgba(31,31,31,0.4);
  color: rgba(226,226,226,0.35);
  font-family: var(--f-headline);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition), border-color var(--transition);
}

.file-label:hover {
  background: var(--c-surface);
  color: var(--c-text-muted);
  border-color: rgba(170, 137, 132, 0.4);
}

.file-label svg {
  margin-inline: auto;
}

/* Form submit */
#contact-form .btn-primary {
  margin-top: 2rem;
  font-size: 0.82rem;
  padding: 1.1rem 2.5rem;
}

.form-note {
  text-align: center;
  font-size: 0.75rem;
  color: var(--c-text-muted);
  margin-top: 1rem;
}

/* Form success state */
.form-success {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 1.25rem;
  padding: var(--sp-16) 2rem;
  background: var(--c-surface);
  min-height: 300px;
}

.form-success[hidden] {
  display: none;
}

.success-icon {
  margin-inline: auto;
}

.form-success h3 {
  font-size: 1.75rem;
  text-transform: uppercase;
}

.form-success p {
  color: var(--c-text-muted);
  max-width: 400px;
}

/* Field error state */
.form-group.has-error input,
.form-group.has-error select,
.form-group.has-error textarea {
  border-bottom-color: #ff6b6b;
  box-shadow: 0 1px 0 0 #ff6b6b;
}

.field-error {
  font-size: 0.72rem;
  color: #ff8585;
  margin-top: 0.25rem;
}

/* ── 14. FOOTER ───────────────────────────────────────────── */
#footer {
  background: var(--c-surface-bot);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-8);
  padding-top: var(--sp-16);
  padding-bottom: var(--sp-8);
}

.footer-logo {
  display: block;
  margin-bottom: 1.25rem;
  font-size: 1.3rem;
}

.footer-brand p {
  font-size: 0.85rem;
  color: var(--c-text-muted);
  line-height: 1.7;
  max-width: 320px;
}

.social-links {
  display: flex;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.social-link {
  color: var(--c-text-muted);
  transition: color var(--transition);
}

.social-link:hover {
  color: var(--c-primary);
}

.footer-col h4 {
  font-family: var(--f-headline);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--c-primary);
  margin-bottom: 1.5rem;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 2rem;
}

.footer-contact li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
}

.footer-contact li svg {
  flex-shrink: 0;
}

.footer-contact a {
  color: var(--c-text);
  transition: color var(--transition);
}

.footer-contact a:hover {
  color: var(--c-primary);
}

.footer-hours p {
  font-size: 0.85rem;
  color: var(--c-text-muted);
  line-height: 1.75;
}

.footer-hours strong {
  color: var(--c-text);
  display: block;
  margin-bottom: 0.25rem;
  font-family: var(--f-headline);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.rbq-badge {
  background: var(--c-surface);
  border-left: 3px solid var(--c-primary);
  padding: 1.25rem 1.5rem;
  margin-bottom: 2rem;
  display: inline-block;
}

.rbq-number {
  font-family: var(--f-headline);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 0.25rem;
}

.rbq-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--c-text-muted);
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-nav a {
  font-size: 0.85rem;
  color: var(--c-text-muted);
  transition: color var(--transition);
}

.footer-nav a:hover {
  color: var(--c-text);
}

.footer-bottom {
  border-top: 1px solid rgba(226,226,226,0.05);
  padding-block: 1.5rem;
}

.footer-bottom p {
  font-size: 0.75rem;
  color: rgba(226,226,226,0.25);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ── 15. RESPONSIVE — 768px ───────────────────────────────── */
@media (min-width: 768px) {

  .container {
    padding-inline: 2.5rem;
  }

  /* Header */
  #main-nav {
    display: flex;
  }

  #hamburger {
    display: none;
  }

  .header-cta {
    display: inline-block;
  }

  /* Services */
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Gallery */
  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
  }

  /* Pourquoi */
  .pourquoi-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
  }

  /* Testimonials */
  .temoignage-card {
    flex: 0 0 calc((100% - 1.5rem) / 2);
  }

  .temoignages-dots {
    display: none;
  }

  /* Form */
  .form-row {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Footer */
  .footer-inner {
    grid-template-columns: 1.5fr 1fr 1fr;
  }

}

/* ── 16. RESPONSIVE — 1024px ──────────────────────────────── */
@media (min-width: 1024px) {

  .container {
    padding-inline: 3rem;
  }

  /* Services */
  .services-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  /* Testimonials — full 3 cols, no scroll */
  .temoignages-track {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    transform: none !important;
  }

  .temoignage-card {
    flex: unset;
  }

  .temoignages-dots {
    display: none;
  }

  /* Hero adjustments */
  .hero-content h1 {
    font-size: 5rem;
  }

}

/* ── 17. REDUCED MOTION ───────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  .fade-in-section,
  .fade-in-item {
    opacity: 1;
    transform: none;
    animation: none;
  }
}