:root {
  --ink: #16211c;
  --ink-soft: #3d4a43;
  --muted: #6b7a71;
  --paper: #fbf7f0;
  --paper-tint: #f1ecdf;
  --accent: #e4572e;
  --accent-dark: #c53f1c;
  --line: #e3dccb;
  --white: #ffffff;
  --green: #2f5d40;
  --green-deep: #233f2f;
  --step: 8px;
  --radius: 14px;
  --font-display: "Archivo", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 88px; }

body { margin: 0; }

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

a { color: inherit; }

.container {
  width: min(1120px, 92vw);
  margin-inline: auto;
}

/* ============ Header / nav ============ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(251, 247, 240, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  padding-block: 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.18rem;
  letter-spacing: -0.01em;
}

.brand-mark {
  width: 30px;
  height: 30px;
  color: var(--accent);
  flex-shrink: 0;
}

.site-nav {
  display: none;
  gap: 26px;
  margin-inline: auto;
}

.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
}

.site-nav a:hover { color: var(--accent-dark); }

.btn-nav { margin-left: auto; }

@media (min-width: 900px) {
  .site-nav { display: flex; }
  .btn-nav { margin-left: 0; }
}

/* ============ Buttons ============ */

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.96rem;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--accent);
  color: var(--white);
}

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

.btn-secondary {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}

.btn-secondary:hover { border-color: var(--ink-soft); color: var(--ink-soft); }

/* ============ Hero ============ */

.hero {
  background:
    radial-gradient(1000px 600px at 85% -10%, rgba(228, 87, 46, 0.12), transparent 60%),
    var(--paper);
  padding: 96px 0 72px;
  border-bottom: 1px solid var(--line);
}

.hero-inner { text-align: center; }

.eyebrow {
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.8rem;
  color: var(--accent-dark);
  margin: 0 0 18px;
}

.eyebrow-light { color: var(--accent); }

h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.15rem, 5.5vw, 3.6rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 22px;
}

.accent { color: var(--accent-dark); }

.hero-sub {
  max-width: 640px;
  margin: 0 auto 30px;
  color: var(--ink-soft);
  font-size: 1.12rem;
}

.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.hero-note {
  margin-top: 30px;
  color: var(--muted);
  font-size: 0.92rem;
  border-top: 1px dashed var(--line);
  padding-top: 18px;
  display: inline-block;
}

/* ============ Sections ============ */

.section { padding: 84px 0; }

.section-tinted { background: var(--paper-tint); border-block: 1px solid var(--line); }

.section-dark {
  background: var(--green-deep);
  color: #edf3ee;
  border-block: 1px solid rgba(255, 255, 255, 0.08);
}

.section-dark h2 { color: #fff; }

h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.7rem, 3.6vw, 2.5rem);
  letter-spacing: -0.015em;
  line-height: 1.15;
  margin: 0 0 18px;
}

.section-intro {
  max-width: 620px;
  color: var(--ink-soft);
  font-size: 1.05rem;
  margin: 0 0 34px;
}

/* ============ Grids & cards ============ */

.grid-2 { display: grid; grid-template-columns: 1fr; gap: 20px; }

@media (min-width: 820px) { .grid-2 { grid-template-columns: 1fr 1fr; } }

.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px;
}

.card h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  margin: 0 0 10px;
  color: var(--ink);
}

.card p { color: var(--ink-soft); margin: 0 0 12px; }

.stat-label {
  display: block;
  color: var(--accent-dark);
  font-family: var(--font-display);
  font-weight: 600;
  margin: 14px 0 0;
}

/* ============ Installation type ============ */

.setup-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-bottom: 26px;
}

@media (min-width: 820px) { .setup-grid { grid-template-columns: 1fr 1fr; } }

.setup-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
}

.setup-number {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 2.4rem;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 14px;
  opacity: 0.85;
}

.setup-card h3 { font-family: var(--font-display); font-weight: 700; font-size: 1.12rem; margin: 0 0 10px; }

.setup-card p { color: var(--ink-soft); margin: 0; }

.setup-footer {
  color: var(--muted);
  font-size: 0.95rem;
  max-width: 640px;
  margin: 0;
}

/* ============ Gamme ============ */

.range-grid { display: grid; grid-template-columns: 1fr; gap: 20px; }

@media (min-width: 820px) { .range-grid { grid-template-columns: repeat(3, 1fr); } }

.range-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-top: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 28px;
}

.range-card h3 { font-family: var(--font-display); font-weight: 700; font-size: 1.12rem; margin: 0 0 4px; }

.range-sub {
  font-family: var(--font-display);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.72rem;
  color: var(--accent-dark);
  margin: 0 0 14px;
}

.range-desc { color: var(--ink-soft); margin: 0; font-size: 0.98rem; }

/* ============ Mission / valeurs ============ */

.mission-text {
  max-width: 720px;
  font-size: 1.15rem;
  color: #dbe7dd;
  margin: 0 0 42px;
}

.values { display: grid; grid-template-columns: 1fr; gap: 22px; }

@media (min-width: 820px) { .values { grid-template-columns: repeat(3, 1fr); } }

.value {
  border-top: 2px solid rgba(255, 255, 255, 0.18);
  padding-top: 18px;
}

.value h3 { font-family: var(--font-display); font-weight: 700; font-size: 1.2rem; margin: 0 0 8px; color: var(--accent); }

.value p { color: #c6d6ca; margin: 0; font-size: 0.97rem; }

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

.faq-list {
  display: grid;
  gap: 12px;
  max-width: 780px;
}

.faq-item {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0;
  overflow: hidden;
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 20px 26px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--ink);
  position: relative;
  padding-right: 46px;
  user-select: none;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 22px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.4rem;
  color: var(--accent);
  transition: transform 0.15s ease;
}

.faq-item[open] summary::after { transform: translateY(-50%) rotate(45deg); }

.faq-item[open] summary { color: var(--accent-dark); }

.faq-item p {
  margin: 0;
  padding: 0 26px 22px;
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.faq-item a { color: var(--accent-dark); font-weight: 600; }

/* ============ Contact ============ */

.section-contact { background: var(--paper-tint); border-top: 1px solid var(--line); }

.contact-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  align-items: start;
}

@media (min-width: 820px) { .contact-inner { grid-template-columns: 1.2fr 1fr; } }

.contact-sub { color: var(--ink-soft); font-size: 1.05rem; max-width: 540px; }

.contact-ways { font-style: normal; display: grid; gap: 20px; }

.contact-ways p { margin: 0; }

.contact-ways strong { font-family: var(--font-display); font-weight: 700; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-soft); }

.contact-ways a { color: var(--accent-dark); font-weight: 600; text-decoration: none; font-size: 1.12rem; }

.contact-ways a:hover { text-decoration: underline; }

.contact-note { color: var(--muted); font-size: 0.92rem; line-height: 1.6; }

/* ============ Footer ============ */

.site-footer {
  background: var(--green-deep);
  color: #c6d6ca;
  padding: 40px 0;
  font-size: 0.92rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-start;
}

.site-footer .brand-name { color: #fff; }

.site-footer a { color: var(--accent); text-decoration: none; }

.site-footer a:hover { text-decoration: underline; }

/* ============ Accessibilité ============ */

:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}