/* =========================================================
   Claude Labar — Bureau d'architectes
   Design : plan technique + matière bois + échelle PEB
   ========================================================= */

:root {
  --color-bg:        #F3F1EC;
  --color-bg-alt:    #EAE6DC;
  --color-panel:     #FFFDF9;
  --color-ink:       #1E2621;
  --color-ink-soft:  #4A5650;
  --color-wood:      #A9713F;
  --color-wood-dark: #7C5230;
  --color-slate:     #2F3E36;
  --color-energy:    #4C7C59;
  --color-line:      #C9C2B4;

  --font-display: 'Fraunces', Georgia, serif;
  --font-body:    'IBM Plex Sans', Arial, sans-serif;
  --font-mono:    'IBM Plex Mono', 'Courier New', monospace;

  --nav-w: 236px;
  --gutter: clamp(1.5rem, 4vw, 4rem);
  --radius: 2px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3 { font-family: var(--font-display); font-weight: 500; line-height: 1.15; margin: 0 0 1rem; color: var(--color-slate); }
p { margin: 0 0 1.1rem; max-width: 62ch; }
:focus-visible { outline: 2px solid var(--color-wood); outline-offset: 3px; }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 2000;
  background: var(--color-ink); color: #fff; padding: .75rem 1.25rem;
}
.skip-link:focus { left: 1rem; top: 1rem; }

/* ---------- Nav (règle graduée) ---------- */
.site-nav {
  position: fixed; top: 0; left: 0; bottom: 0; width: var(--nav-w);
  background: var(--color-slate);
  color: #EDEAE2;
  display: flex; flex-direction: column; justify-content: space-between;
  padding: 2rem 1.75rem;
  z-index: 900;
  border-right: 1px solid rgba(255,255,255,.08);
}
.nav-brand a {
  font-family: var(--font-display); font-size: 1.5rem; line-height: 1.05;
  text-decoration: none; color: #fff; font-weight: 500;
}
.nav-brand-sub {
  display: block; margin-top: .6rem; font-family: var(--font-mono);
  font-size: .68rem; letter-spacing: .08em; text-transform: uppercase; color: #A9B3AB;
}
.nav-links { margin: 3rem 0; display: flex; flex-direction: column; gap: 1.4rem; }
.nav-links a {
  text-decoration: none; font-size: .98rem; color: #D8D4C8;
  position: relative; padding-left: 0; transition: color .2s ease, padding-left .2s ease;
}
.nav-links a::before {
  content: ''; display: inline-block; width: 0; height: 1px; background: var(--color-wood);
  vertical-align: middle; margin-right: 0; transition: width .2s ease, margin-right .2s ease;
}
.nav-links a:hover, .nav-links a.active { color: #fff; padding-left: .2rem; }
.nav-links a:hover::before, .nav-links a.active::before { width: 14px; margin-right: 8px; }

.nav-contact { display: flex; flex-direction: column; gap: .8rem; }
.nav-cta {
  text-decoration: none; text-align: center; padding: .7rem 1rem;
  background: var(--color-wood); color: #fff; font-size: .9rem; letter-spacing: .02em;
  border-radius: var(--radius); transition: background .2s ease;
}
.nav-cta:hover, .nav-cta.active { background: var(--color-wood-dark); }
.nav-phone {
  font-family: var(--font-mono); font-size: .82rem; text-align: center; color: #A9B3AB; text-decoration: none;
}

.menu-toggle { display: none; }

/* ---------- Layout ---------- */
main { margin-left: var(--nav-w); }
section { padding: 5.5rem var(--gutter); }
.section-tight { padding-top: 3rem; padding-bottom: 3rem; }

.eyebrow {
  font-family: var(--font-mono); font-size: .72rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--color-wood); margin-bottom: .9rem; display: block;
}

/* ---------- Hero ---------- */
.hero {
  min-height: 92vh; display: flex; align-items: flex-end; position: relative; overflow: hidden;
  background: var(--color-slate); color: #fff; padding: 3rem var(--gutter) 4rem;
}
.hero-media {
  position: absolute; inset: 0; z-index: 0;
}
.hero-media img { width: 100%; height: 100%; object-fit: cover; opacity: .55; }
.hero-media::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(30,38,33,.15) 0%, rgba(30,38,33,.85) 100%);
}
.hero-content { position: relative; z-index: 1; max-width: 780px; }
.hero-tag {
  font-family: var(--font-mono); font-size: .8rem; letter-spacing: .1em; text-transform: uppercase;
  color: #C8D2C9; margin-bottom: 1.2rem; display: block;
}
.hero h1 { color: #fff; font-size: clamp(2.2rem, 5vw, 3.6rem); max-width: 14ch; }
.hero p { color: #DCE2DC; font-size: 1.15rem; max-width: 46ch; }

/* ---------- Plan grid (index pillars) ---------- */
.plan-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 2.5rem;
}
.plan-card { display: block; text-decoration: none; color: inherit; }
.plan-card-frame {
  position: relative; padding: 10px; border: 1px solid var(--color-line);
}
.plan-card-frame::before, .plan-card-frame::after,
.plan-card-frame span.tick-br::before, .plan-card-frame span.tick-br::after { content: ''; position: absolute; width: 14px; height: 14px; }
.plan-card-frame::before { top: -1px; left: -1px; border-top: 2px solid var(--color-wood); border-left: 2px solid var(--color-wood); }
.plan-card-frame::after { bottom: -1px; right: -1px; border-bottom: 2px solid var(--color-wood); border-right: 2px solid var(--color-wood); }
.plan-card-frame img { aspect-ratio: 4/3; object-fit: cover; }
.plan-card h3 { margin: 1.3rem 0 .5rem; font-size: 1.35rem; }
.plan-card p { font-size: .95rem; color: var(--color-ink-soft); }
.plan-card-more { font-family: var(--font-mono); font-size: .78rem; color: var(--color-wood); }

/* ---------- Prose / feature sections ---------- */
.feature {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 3.5rem; align-items: start;
}
.feature.reverse { grid-template-columns: .9fr 1.1fr; }
.feature.reverse .feature-media { order: 2; }
.spec-list { display: grid; gap: .9rem; margin-top: 1.5rem; }
.spec-list li {
  display: flex; gap: .9rem; align-items: baseline; padding-bottom: .9rem; border-bottom: 1px solid var(--color-line);
  font-size: .96rem;
}
.spec-list .spec-num { font-family: var(--font-mono); font-size: .78rem; color: var(--color-wood); min-width: 2.2rem; }

/* ---------- Carousel ---------- */
.carousel {
  position: relative; border: 1px solid var(--color-line); padding: 10px; background: var(--color-panel);
}
.carousel-viewport { position: relative; aspect-ratio: 4/3; overflow: hidden; }
.carousel-viewport img {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  opacity: 0; transition: opacity .5s ease;
}
.carousel-viewport img.is-active { opacity: 1; }
.carousel-controls {
  display: flex; justify-content: space-between; align-items: center; margin-top: .8rem;
}
.carousel-controls button {
  border: 1px solid var(--color-ink); background: transparent; width: 40px; height: 40px;
  cursor: pointer; font-size: 1.1rem; font-family: var(--font-mono); color: var(--color-ink);
  transition: background .2s ease, color .2s ease;
}
.carousel-controls button:hover { background: var(--color-ink); color: #fff; }
.carousel-count { font-family: var(--font-mono); font-size: .8rem; color: var(--color-ink-soft); }

/* ---------- Energy bar (signature) ---------- */
.energy-bar { max-width: 560px; margin: 3rem auto 0; text-align: center; }
.energy-bar-track { display: flex; gap: 4px; height: 10px; }
.energy-step {
  flex: 1; background: var(--color-line); opacity: .5; border-radius: 1px;
}
.energy-step[data-step="A"] { background: #3E7A52; }
.energy-step[data-step="B"] { background: #6B9C4F; }
.energy-step[data-step="C"] { background: #B4B94A; }
.energy-step[data-step="D"] { background: #D8A93E; }
.energy-step[data-step="E"] { background: #D98235; }
.energy-step[data-step="F"] { background: #C15A38; }
.energy-step[data-step="G"] { background: #A9402F; }
.energy-step.is-active { opacity: 1; height: 16px; margin-top: -3px; }
.energy-bar-label {
  margin-top: 1rem; font-family: var(--font-mono); font-size: .78rem; color: var(--color-ink-soft);
  letter-spacing: .03em;
}
.energy-bar-mark {
  display: inline-flex; align-items: center; justify-content: center; width: 22px; height: 22px;
  background: var(--color-ink); color: #fff; margin-right: .6rem; font-weight: 600;
}

/* ---------- FAQ (AEO) ---------- */
.faq { max-width: 760px; }
.faq-item { border-bottom: 1px solid var(--color-line); padding: 1.4rem 0; }
.faq-item h3 { font-size: 1.1rem; margin-bottom: .5rem; font-family: var(--font-body); font-weight: 600; }
.faq-item p { color: var(--color-ink-soft); font-size: .96rem; }

/* ---------- CTA band ---------- */
.cta-band {
  background: var(--color-slate); color: #fff; text-align: center;
}
.cta-band h2 { color: #fff; }
.cta-band p { color: #D8DED9; margin: 0 auto 1.6rem; }
.btn {
  display: inline-block; text-decoration: none; padding: .9rem 1.8rem; font-size: .95rem;
  background: var(--color-wood); color: #fff; border-radius: var(--radius); transition: background .2s ease;
}
.btn:hover { background: var(--color-wood-dark); }
.btn-outline { background: transparent; border: 1px solid #fff; }
.btn-outline:hover { background: rgba(255,255,255,.1); }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 3.5rem; }
.contact-info-list li { padding: 1rem 0; border-bottom: 1px solid var(--color-line); }
.contact-info-list .label { display: block; font-family: var(--font-mono); font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; color: var(--color-wood); margin-bottom: .3rem; }
.contact-info-list a { text-decoration: none; }
.contact-info-list a:hover { color: var(--color-wood); }

.contact-form { display: grid; gap: 1.1rem; }
.form-row { display: grid; gap: .4rem; }
.form-row label { font-size: .85rem; color: var(--color-ink-soft); }
.form-row input, .form-row textarea {
  padding: .85rem 1rem; border: 1px solid var(--color-line); background: var(--color-panel);
  font-family: var(--font-body); font-size: 1rem; color: var(--color-ink); border-radius: var(--radius);
}
.form-row input:focus, .form-row textarea:focus { border-color: var(--color-wood); }
.contact-form button {
  justify-self: start; border: none; cursor: pointer;
}
.form-note { font-size: .82rem; color: var(--color-ink-soft); }
.form-status { font-size: .9rem; padding: .8rem 1rem; border-radius: var(--radius); display: none; }
.form-status.is-success { display: block; background: #E4EEE6; color: #2F5C3E; }
.form-status.is-error { display: block; background: #F4E1DC; color: #8A3A26; }

.map-embed { border: 1px solid var(--color-line); margin-top: 2rem; }
.map-embed iframe { width: 100%; height: 320px; border: 0; display: block; }

/* ---------- Footer ---------- */
.site-footer {
  margin-left: var(--nav-w); background: var(--color-bg-alt); border-top: 1px solid var(--color-line);
  padding: 4rem var(--gutter) 2rem;
}
.footer-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2.5rem; }
.footer-brand { font-family: var(--font-display); font-size: 1.3rem; color: var(--color-slate); margin-bottom: .6rem; }
.footer-label { font-family: var(--font-mono); font-size: .7rem; letter-spacing: .08em; text-transform: uppercase; color: var(--color-wood); margin-bottom: .5rem; }
.footer-block p { font-size: .9rem; }
.footer-links li { margin-bottom: .45rem; }
.footer-links a { text-decoration: none; font-size: .9rem; }
.footer-links a:hover { color: var(--color-wood); }
.footer-bottom { margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid var(--color-line); font-size: .78rem; color: var(--color-ink-soft); }

/* ---------- Legal page ---------- */
.legal-content { max-width: 72ch; }
.legal-content h2 { margin-top: 2.5rem; font-size: 1.3rem; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .plan-grid { grid-template-columns: 1fr; }
  .feature, .feature.reverse { grid-template-columns: 1fr; }
  .feature.reverse .feature-media { order: 0; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  :root { --nav-w: 0px; }
  .site-nav {
    transform: translateX(-100%); transition: transform .3s ease; width: min(320px, 82vw);
  }
  .site-nav.is-open { transform: translateX(0); }
  main, .site-footer { margin-left: 0; }
  .menu-toggle {
    display: flex; flex-direction: column; justify-content: center; gap: 5px;
    position: fixed; top: 1.2rem; left: 1.2rem; z-index: 1000;
    width: 44px; height: 44px; background: var(--color-slate); border: none; cursor: pointer;
  }
  .menu-toggle span { width: 20px; height: 2px; background: #fff; margin: 0 auto; }
  section { padding: 4rem 1.25rem; }
  .hero { padding-top: 5rem; }
}

@media (max-width: 620px) {
  .footer-grid { grid-template-columns: 1fr; }
}

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