/* FAP RENOV — refonte
   Palette : ivoire chaud, vert (procédé écologique), rouge-brique (accent CTA)
   repris et assagi depuis le rouge/vert du site actuel. */

:root {
  --bg: #f7f5f0;
  --surface: #ffffff;
  --surface-alt: #efebe1;
  --ink: #1e1c18;
  --ink-muted: #5b584f;
  --ink-faint: #8a8778;
  --line: #e4e0d5;
  --green: #2e6f4c;
  --green-soft: #8fbf9f;
  --rust: #c1442f;
  --rust-dark: #8f2e1d;
  --alert-bg: #fbf4f1;
  --alert-line: #e6beb4;
  --alert-ink: #5b4a46;
  --radius: 12px;
}

* {
  box-sizing: border-box;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

section[id] {
  scroll-margin-top: 84px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Work Sans", system-ui, -apple-system, sans-serif;
  line-height: 1.5;
}

h1, h2, h3 {
  font-family: "Source Serif 4", Georgia, serif;
  font-weight: 600;
  margin: 0;
}

a {
  color: inherit;
}

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

.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

/* En-tête */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

.site-header .wrap {
  height: 84px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  text-decoration: none;
}

.logo strong {
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.3px;
}

.logo span {
  font-size: 11px;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.main-nav-inner {
  display: flex;
  align-items: center;
  gap: 32px;
}

.main-nav a {
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.15s;
}

.main-nav a:hover,
.main-nav a[aria-current="page"] {
  color: var(--rust-dark);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  cursor: pointer;
}

.nav-toggle .bar {
  transform-origin: 12px 12px;
  transition: transform 0.25s ease, opacity 0.2s ease;
}

.nav-toggle.is-open .bar-top {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle.is-open .bar-mid {
  opacity: 0;
}

.nav-toggle.is-open .bar-bottom {
  transform: translateY(-6px) rotate(-45deg);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  white-space: nowrap;
}

.btn-primary {
  background: var(--rust);
  color: #fbf4f1;
  transition: background 0.15s;
}

.btn-primary:hover {
  background: var(--rust-dark);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--ink);
  color: var(--ink);
  transition: background 0.15s;
}

.btn-outline:hover {
  background: var(--surface-alt);
}

/* Hero */

.hero {
  padding-top: 64px;
  padding-bottom: 80px;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.eyebrow {
  display: block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 18px;
}

.eyebrow.rust {
  color: var(--rust-dark);
}

.hero h1 {
  font-size: 42px;
  line-height: 1.15;
  margin-bottom: 20px;
}

.hero-lead {
  font-size: 17px;
  color: var(--ink-muted);
  max-width: 500px;
  margin-bottom: 28px;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 24px;
}

.trust-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.trust-chips li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--ink);
}

.trust-chips svg {
  flex-shrink: 0;
  color: var(--green);
}

.hero-media {
  width: 100%;
  aspect-ratio: 4 / 3;
  background: var(--line);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-media span {
  font-size: 13px;
  color: var(--ink-faint);
  text-align: center;
  padding: 0 24px;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Sections génériques */

.section {
  padding: 72px 0;
}

.section-dark {
  background: var(--ink);
  color: var(--bg);
}

.section-alt {
  background: var(--surface-alt);
}

.section-head {
  margin-bottom: 40px;
  max-width: 700px;
}

.section-head h2 {
  font-size: 30px;
  margin: 12px 0 12px;
}

.section-dark .section-head h2 {
  color: var(--bg);
}

.section-head p {
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink-muted);
  margin: 0;
}

.section-dark .section-head p {
  color: #c9c6ba;
}

.breadcrumb {
  padding-top: 32px;
  font-size: 13px;
  color: var(--ink-faint);
}

.breadcrumb a {
  text-decoration: none;
  color: var(--ink-faint);
}

.breadcrumb a:hover {
  color: var(--rust-dark);
}

.page-head {
  padding-top: 32px;
  padding-bottom: 8px;
}

.page-head h1 {
  font-size: 34px;
}

.page-head p {
  margin-top: 14px;
  font-size: 16px;
  color: var(--ink-muted);
  max-width: 640px;
}

/* Procédé — étapes */

.steps {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 24px;
}

.step {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.step .num {
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 28px;
  color: var(--green-soft);
}

.step h3 {
  font-size: 15px;
  font-weight: 500;
  font-family: inherit;
}

.step p {
  font-size: 13px;
  line-height: 1.55;
  color: #a6a398;
  margin: 0;
}

.procede-head {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 48px;
  align-items: start;
  margin-bottom: 48px;
}

.machine-figure {
  margin: 0;
  background: var(--surface);
  border-radius: var(--radius);
  padding: 16px;
}

.machine-figure img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 6px;
}

.machine-figure figcaption {
  margin-top: 12px;
  font-size: 12px;
  color: var(--ink-faint);
  text-align: center;
}

/* Avantages */

.cards {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.card svg {
  color: var(--green);
}

.card h3 {
  font-size: 16px;
  font-weight: 500;
  font-family: inherit;
}

.card p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-muted);
  margin: 0;
}

/* Vidéos */

.video-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.video-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.video-card .frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--ink);
}

.video-card iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.video-card .caption {
  padding: 14px 16px;
}

.video-card .caption strong {
  display: block;
  font-size: 14px;
  font-weight: 500;
}

.video-card .caption span {
  display: block;
  font-size: 12px;
  color: var(--ink-faint);
  margin-top: 3px;
}

/* Bandeau réglementation */

.callout {
  background: var(--alert-bg);
  border: 1px solid var(--alert-line);
  border-radius: var(--radius);
  padding: 32px 36px;
  display: flex;
  gap: 20px;
}

.callout svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--rust-dark);
}

.callout strong {
  display: block;
  font-size: 16px;
  color: var(--rust-dark);
  margin-bottom: 10px;
}

.callout p {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--alert-ink);
  max-width: 760px;
}

.callout p:last-child {
  margin-bottom: 0;
}

/* Contact */

.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin: 28px 0;
}

.contact-item {
  display: flex;
  gap: 14px;
}

.contact-item svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--green-soft);
}

.contact-item strong {
  display: block;
  font-size: 15px;
  font-weight: 500;
}

.contact-item span,
.contact-item a {
  display: block;
  font-size: 14px;
  color: #c9c6ba;
  text-decoration: none;
}

.contact-form {
  background: #292620;
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-form > strong {
  font-size: 15px;
  font-weight: 500;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field label {
  font-size: 12px;
  color: #a6a398;
}

.field input,
.field textarea {
  background: var(--ink);
  border: 1px solid #443f36;
  border-radius: 8px;
  padding: 11px 14px;
  color: var(--bg);
  font-size: 14px;
  font-family: inherit;
}

.field textarea {
  resize: none;
}

.contact-form .btn-primary {
  align-self: flex-start;
  margin-top: 4px;
}

/* Pied de page */

.site-footer {
  border-top: 1px solid var(--line);
  padding: 28px 0;
}

.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--ink-faint);
}

.credit-link {
  color: inherit;
  opacity: 0.7;
  text-decoration: underline;
}

.credit-link:hover {
  opacity: 1;
}

.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: var(--ink);
  color: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 25;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.2s, transform 0.2s, visibility 0.2s, background 0.15s;
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--rust-dark);
}

/* Responsive */

@media (max-width: 960px) {
  section[id] {
    scroll-margin-top: 64px;
  }

  .back-to-top {
    right: 16px;
    bottom: 16px;
    width: 40px;
    height: 40px;
  }

  .hero,
  .contact-grid,
  .procede-head {
    grid-template-columns: 1fr;
  }

  .machine-figure {
    max-width: 260px;
  }

  .steps,
  .cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .site-header .wrap {
    height: 64px;
  }

  .logo strong {
    font-size: 18px;
  }

  .logo span {
    display: none;
  }

  .call-btn {
    padding: 9px 14px;
  }

  .call-btn-label {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding-top: 56px;
    padding-bottom: 64px;
  }

  .main-nav {
    display: grid;
    grid-template-rows: 0fr;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid transparent;
    overflow: hidden;
    transition: grid-template-rows 0.3s ease, border-color 0.3s ease;
  }

  .main-nav.is-open {
    grid-template-rows: 1fr;
    border-bottom-color: var(--line);
  }

  .main-nav-inner {
    min-height: 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 8px 32px 20px;
  }

  .main-nav a {
    width: 100%;
    padding: 10px 0;
    opacity: 0;
    transform: translateY(-4px);
    transition: opacity 0.2s ease, transform 0.2s ease;
  }

  .main-nav.is-open a {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.08s;
  }

  @media (prefers-reduced-motion: reduce) {
    .main-nav,
    .main-nav a,
    .nav-toggle .bar {
      transition: none;
    }
  }
}