/* KVS Construction — Appareillage Minéral
   Source de vérité : design-system/creative-concept.md + data/tokens.json
   Pile : Fraunces (display) + Hanken Grotesk (sans) + JetBrains Mono (mono) */

/* Web fonts via Google Fonts CDN (fallback si offline = system fonts) */
@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,600&family=Hanken+Grotesk:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ============================================
   1. RESET & BASE
   ============================================ */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: auto; }
body {
  margin: 0;
  font-family: 'Hanken Grotesk', system-ui, -apple-system, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--ink);
  background: var(--paper);
  font-feature-settings: 'ss01', 'cv11';
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; padding: 0; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, h5, h6 { margin: 0; font-weight: 400; }

/* ============================================
   2. TOKENS
   ============================================ */
:root {
  --mineral-50: #F5F1EB;
  --mineral-100: #E8E1D8;
  --mineral-300: #D6CDC3;
  --mineral-700: #4A4138;
  --mineral-900: #1C1916;
  --mineral-950: #0F0D0B;
  --brick: #B5482D;
  --brick-hover: #9A3A22;
  --slate: #2D3A47;
  --ink: #1C1916;
  --paper: #E8E1D8;
  --warm-radial-center: #2A241E;
  --c-dominant: var(--mineral-100);
  --c-dominant-dark: var(--mineral-900);
  --c-accent: var(--brick);
  --c-cold: var(--slate);
  --c-paper: var(--mineral-100);
  --c-ink: var(--mineral-900);
  --fs-h1: clamp(2.5rem, 6.5vw, 5rem);
  --fs-h2: clamp(1.75rem, 4vw, 3rem);
  --fs-h3: 1.25rem;
  --fs-body: 1.0625rem;
  --fs-small: 0.875rem;
  --fs-micro: 0.75rem;
  --lh-display: 1.05;
  --lh-body: 1.55;
  --lh-tight: 1.2;
  --tr-eyebrow: 0.14em;
  --tr-h3: 0.04em;
  --section-y: clamp(3.5rem, 7vw, 6rem);
  --container-x: clamp(1.25rem, 4vw, 2.5rem);
  --container-max: 1240px;
  --gutter: clamp(1rem, 2vw, 1.5rem);
  --r-sm: 2px;
  --r-md: 4px;
  --r-lg: 8px;
  --sh-low: 0 1px 2px rgba(28,25,22,0.08);
  --sh-mid: 0 4px 12px rgba(28,25,22,0.10);
  --sh-high: 0 12px 32px rgba(28,25,22,0.14);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-inout: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-standard: cubic-bezier(0.2, 0.7, 0.2, 1);
  --d-fast: 180ms;
  --d-norm: 320ms;
  --d-slow: 640ms;
  --d-motif: 1400ms;
  --stagger: 60ms;
  --z-base: 1;
  --z-header: 50;
  --z-menu: 60;
  --z-sheet: 70;
  --z-chat: 80;
  --brick-w: 240px;
  --brick-h: 71px;
  --joint: 12px;
}

/* ============================================
   3. TYPOGRAPHIE
   ============================================ */
.eyebrow, .mono {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: var(--tr-eyebrow);
  font-weight: 400;
  color: var(--c-cold);
}
.eyebrow-on-dark { color: var(--mineral-300); }
h1, .h1 {
  font-family: 'Fraunces', Georgia, serif;
  font-size: var(--fs-h1);
  line-height: var(--lh-display);
  font-weight: 400;
  font-variation-settings: 'opsz' 144, 'SOFT' 0, 'SHARP' 100;
  letter-spacing: -0.01em;
  color: var(--c-ink);
}
h2, .h2 {
  font-family: 'Fraunces', Georgia, serif;
  font-size: var(--fs-h2);
  line-height: var(--lh-display);
  font-weight: 400;
  font-variation-settings: 'opsz' 100;
  letter-spacing: -0.005em;
  color: var(--c-ink);
}
h3, .h3 {
  font-family: 'Hanken Grotesk', sans-serif;
  font-size: var(--fs-h3);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--tr-h3);
  line-height: var(--lh-tight);
}
p { margin: 0 0 1rem; }
p:last-child { margin-bottom: 0; }
.lead { font-size: 1.125rem; line-height: 1.5; color: var(--mineral-700); max-width: 60ch; }
.section--dark .lead { color: var(--mineral-300); }
.text-accent { color: var(--brick); }
.ink-accent { color: var(--brick); font-style: italic; }

/* ============================================
   4. UTILITAIRES
   ============================================ */
.container { width: 100%; max-width: var(--container-max); margin-inline: auto; padding-inline: var(--container-x); }
.section { padding-block: var(--section-y); position: relative; }
.section-tight { padding-block: clamp(2rem, 4vw, 3.5rem); }
.section--dark { background: var(--c-dominant-dark); color: var(--mineral-100); }
.section--dark h1, .section--dark h2, .section--dark .h1, .section--dark .h2 { color: var(--mineral-100); }

.skip-link {
  position: absolute; top: -100px; left: 0;
  background: var(--brick); color: white; padding: 0.75rem 1rem; z-index: 1000;
  transition: top var(--d-fast) var(--ease-out);
}
.skip-link:focus { top: 0; }

.grid-asym { display: grid; grid-template-columns: 1fr; gap: var(--gutter); }
@media (min-width: 1024px) {
  .grid-asym-7-5 { grid-template-columns: 7fr 5fr; }
  .grid-asym-5-7 { grid-template-columns: 5fr 7fr; }
  .grid-asym { grid-template-columns: 7fr 5fr; }
}
.stack > * + * { margin-top: var(--stack, 1rem); }
.flow > * + * { margin-top: 1rem; }

.watermark {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: 'Fraunces', serif;
  font-size: clamp(80px, 14vw, 220px);
  font-weight: 400;
  opacity: 0.03;
  pointer-events: none;
  user-select: none;
  white-space: nowrap;
  z-index: 0;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--mineral-900);
}
.section--dark .watermark { color: var(--mineral-300); opacity: 0.04; }
.section > .container { position: relative; z-index: 1; }
.section { overflow: hidden; }

.grain {
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.035;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml;utf8,<svg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' seed='7'/><feColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.5 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

/* ============================================
   5. BOUTONS
   ============================================ */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.5rem;
  font-family: 'Hanken Grotesk', sans-serif;
  font-weight: 600;
  font-size: var(--fs-body);
  letter-spacing: 0.01em;
  border-radius: var(--r-sm);
  transition: background-color var(--d-fast) var(--ease-out),
              color var(--d-fast) var(--ease-out),
              transform var(--d-fast) var(--ease-out);
  text-align: center;
  cursor: pointer;
  min-height: 48px;
  white-space: nowrap;
}
.btn-sm { padding: 0.625rem 1rem; font-size: var(--fs-small); min-height: 40px; }
.btn-lg { padding: 1.125rem 2rem; font-size: 1.0625rem; min-height: 56px; }
.btn-accent { background: var(--brick); color: white; }
.btn-accent:hover { background: var(--brick-hover); }
.btn-accent:active { transform: scale(0.98); }
.btn-ghost-light { background: transparent; color: var(--mineral-100); border: 1px solid rgba(255,255,255,0.3); }
.btn-ghost-light:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.5); }
.btn-ghost-dark { background: transparent; color: var(--ink); border: 1px solid var(--ink); }
.btn-ghost-dark:hover { background: var(--ink); color: var(--paper); }
@media (hover: none) { .btn:active { transform: scale(0.98); } }
:focus-visible { outline: 2px solid var(--brick); outline-offset: 3px; }

/* ============================================
   6. HEADER
   ============================================ */
.site-header {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: var(--z-header);
  transition: background-color var(--d-norm) var(--ease-out),
              backdrop-filter var(--d-norm) var(--ease-out),
              box-shadow var(--d-norm) var(--ease-out);
  padding-block: 1.25rem;
}
.site-header.on-dark { color: var(--mineral-100); }
.site-header.is-solid {
  background: rgba(245, 241, 235, 0.92);
  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  box-shadow: var(--sh-low);
  padding-block: 0.625rem;
}
.site-header.is-solid.on-dark { background: rgba(28, 25, 22, 0.92); }
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1.5rem;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-x);
}
.brand { display: flex; align-items: center; gap: 0.625rem; font-family: 'Fraunces', serif; font-size: 1.125rem; font-weight: 600; letter-spacing: -0.01em; color: inherit; }
.brand-mark { display: inline-flex; }
.brand-mark svg path { stroke: currentColor; }
.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-name { font-weight: 600; font-size: 1.0625rem; }
.brand-sub { font-family: 'JetBrains Mono', monospace; font-size: 0.6875rem; text-transform: uppercase; letter-spacing: 0.18em; opacity: 0.7; }
.primary-nav ul { display: flex; gap: 0.5rem; }
.primary-nav a, .primary-nav button {
  display: inline-flex; align-items: center; gap: 0.25rem;
  padding: 0.5rem 0.875rem;
  font-size: var(--fs-small);
  font-weight: 500;
  border-radius: var(--r-sm);
  color: inherit;
  transition: background-color var(--d-fast) var(--ease-out);
}
.primary-nav a:hover, .primary-nav button:hover { background: rgba(28,25,22,0.06); }
.site-header.on-dark .primary-nav a:hover, .site-header.on-dark .primary-nav button:hover { background: rgba(255,255,255,0.08); }
.caret { font-size: 0.7em; opacity: 0.6; }
.has-mega { position: relative; }
.mega {
  position: absolute; top: calc(100% + 0.5rem); left: -1rem;
  min-width: 820px;
  background: var(--mineral-50);
  color: var(--ink);
  border: 1px solid var(--mineral-300);
  box-shadow: var(--sh-high);
  padding: 1.5rem;
  display: grid;
  grid-template-columns: 3fr 1fr;
  gap: 1.5rem;
  border-radius: var(--r-md);
}
.mega[hidden] { display: none; }
.mega-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; }
.mega-card { display: block; padding: 0.75rem; border-radius: var(--r-sm); transition: background-color var(--d-fast) var(--ease-out); }
.mega-card:hover { background: var(--mineral-100); }
.mega-card-title { display: block; font-weight: 600; font-size: var(--fs-small); margin-bottom: 0.25rem; line-height: 1.3; }
.mega-card-desc { display: block; font-size: var(--fs-micro); color: var(--mineral-700); line-height: 1.4; overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.mega-side { background: var(--mineral-900); color: var(--mineral-100); padding: 1rem; border-radius: var(--r-sm); }
.mega-side-eyebrow { color: var(--brick); margin-bottom: 0.5rem; }
.mega-side-text { font-size: var(--fs-small); margin-bottom: 1rem; }
.header-actions { display: flex; align-items: center; gap: 0.75rem; }
.header-tel { display: inline-flex; align-items: center; gap: 0.5rem; font-size: var(--fs-small); font-weight: 500; padding: 0.5rem 0.75rem; border-radius: var(--r-sm); color: inherit; }
.header-tel:hover { background: rgba(28,25,22,0.06); }
.site-header.on-dark .header-tel:hover { background: rgba(255,255,255,0.08); }
.header-cta { display: inline-flex; }
@media (max-width: 1023px) { .header-tel-text, .primary-nav { display: none; } }
.burger { display: none; flex-direction: column; gap: 4px; padding: 0.5rem; }
.burger span { width: 22px; height: 2px; background: currentColor; transition: transform var(--d-fast) var(--ease-out); }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
@media (max-width: 1023px) { .burger { display: flex; } }

/* ============================================
   7. MOBILE MENU
   ============================================ */
.mobile-menu {
  position: fixed; inset: 0;
  background: var(--mineral-50);
  z-index: var(--z-menu);
  padding: 5rem 1.5rem 2rem;
  overflow-y: auto;
}
.mobile-menu[hidden] { display: none; }
.mobile-tabs { display: flex; gap: 0; margin-bottom: 2rem; border-bottom: 1px solid var(--mineral-300); }
.mobile-tabs button { flex: 1; padding: 1rem; font-family: 'Hanken Grotesk', sans-serif; font-size: var(--fs-small); font-weight: 600; text-transform: uppercase; letter-spacing: var(--tr-h3); color: var(--mineral-700); border-bottom: 2px solid transparent; }
.mobile-tabs button[aria-selected="true"] { color: var(--brick); border-bottom-color: var(--brick); }
.mobile-pane[hidden] { display: none; }
.mobile-pane ul { display: flex; flex-direction: column; }
.mobile-pane a { display: block; padding: 1rem 0; font-family: 'Fraunces', serif; font-size: 1.5rem; border-bottom: 1px solid var(--mineral-300); }

/* ============================================
   8. FOOTER
   ============================================ */
.site-footer { background: var(--c-dominant-dark); color: var(--mineral-100); position: relative; overflow: hidden; }
.footer-cta-monument { padding: clamp(3.5rem, 7vw, 6rem) var(--container-x); text-align: center; border-bottom: 1px solid rgba(255,255,255,0.08); position: relative; }
.footer-cta-title { font-family: 'Fraunces', serif; font-size: clamp(2rem, 6vw, 4.5rem); line-height: var(--lh-display); font-weight: 400; margin: 1rem auto 2rem; max-width: 14ch; color: var(--mineral-100); }
.footer-cta-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem; }
.footer-grid { display: grid; grid-template-columns: 1fr; gap: 2.5rem; padding: clamp(3rem, 6vw, 5rem) var(--container-x) 2rem; max-width: var(--container-max); margin-inline: auto; }
@media (min-width: 768px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2rem; } }
.footer-col h3 { font-family: 'JetBrains Mono', monospace; font-size: var(--fs-micro); text-transform: uppercase; letter-spacing: var(--tr-eyebrow); color: var(--brick); margin-bottom: 1rem; }
.footer-col ul { display: flex; flex-direction: column; gap: 0.5rem; }
.footer-col a { font-size: var(--fs-small); color: var(--mineral-300); transition: color var(--d-fast) var(--ease-out); }
.footer-col a:hover { color: var(--mineral-100); }
.footer-brand-name { font-family: 'Fraunces', serif; font-size: 1.5rem; margin-bottom: 1rem; }
.footer-address { font-style: normal; font-size: var(--fs-small); color: var(--mineral-300); line-height: 1.7; }
.footer-address a { color: var(--mineral-100); border-bottom: 1px dotted rgba(255,255,255,0.2); }
.footer-hours { margin-top: 1rem; font-family: 'JetBrains Mono', monospace; font-size: var(--fs-micro); color: var(--mineral-300); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 1.5rem var(--container-x); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; font-size: var(--fs-micro); color: var(--mineral-700); max-width: var(--container-max); margin-inline: auto; }

/* ============================================
   9. HERO
   ============================================ */
.hero {
  position: relative;
  padding: clamp(8rem, 14vh, 12rem) 0 clamp(4rem, 8vw, 7rem);
  background: radial-gradient(ellipse at center, var(--warm-radial-center) 0%, var(--mineral-900) 50%, var(--mineral-950) 100%);
  color: var(--mineral-100);
  overflow: hidden;
  min-height: 80vh;
  display: flex; align-items: center;
}
.hero-inner { max-width: var(--container-max); margin-inline: auto; padding-inline: var(--container-x); position: relative; z-index: 1; width: 100%; }
.hero h1 { color: var(--mineral-100); max-width: 18ch; }
.hero .lead { color: var(--mineral-300); margin-top: 1.5rem; max-width: 50ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2.5rem; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 2rem; margin-top: 4rem; padding-top: 2rem; border-top: 1px solid rgba(255,255,255,0.12); }
.hero-meta-item { display: flex; flex-direction: column; gap: 0.25rem; }
.hero-meta-value { font-family: 'Fraunces', serif; font-size: 1.75rem; color: var(--brick); line-height: 1; }
.hero-meta-label { font-family: 'JetBrains Mono', monospace; font-size: var(--fs-micro); text-transform: uppercase; letter-spacing: var(--tr-eyebrow); color: var(--mineral-300); }

/* ============================================
   10. MOTIF SIGNATURE — CALEPINAGE CHAÎNE FLAMANDE
   ============================================ */
.calepinage {
  display: block;
  width: 100%;
  height: var(--brick-h);
  --stroke: rgba(28,25,22,0.12);
}
.calepinage--dark { --stroke: rgba(245,241,235,0.18); }
.calepinage path, .calepinage line { stroke: var(--stroke); stroke-width: 1; fill: none; }
.calepinage.animate path, .calepinage.animate line { stroke-dasharray: 1000; stroke-dashoffset: 1000; }
.calepinage.animate.in-view path, .calepinage.animate.in-view line {
  transition: stroke-dashoffset var(--d-motif) var(--ease-inout);
  stroke-dashoffset: 0;
}

/* ============================================
   11. CARTES & SECTIONS CONTENU
   ============================================ */
.card {
  background: var(--mineral-50);
  border: 1px solid var(--mineral-300);
  padding: 1.75rem;
  border-radius: var(--r-md);
  transition: transform var(--d-norm) var(--ease-out), box-shadow var(--d-norm) var(--ease-out), border-color var(--d-norm) var(--ease-out);
  position: relative;
  display: flex; flex-direction: column; gap: 0.75rem;
}
.card:hover { transform: translateY(-2px); box-shadow: var(--sh-mid); border-color: var(--mineral-700); }
.card-title { font-family: 'Hanken Grotesk', sans-serif; font-weight: 600; font-size: 1.125rem; }
.card-title--accent { font-family: 'Fraunces', serif; font-weight: 400; font-size: 1.5rem; line-height: 1.2; }
.card-desc { color: var(--mineral-700); font-size: var(--fs-small); line-height: 1.5; }
.card-link { position: absolute; inset: 0; z-index: 1; text-indent: -9999px; overflow: hidden; }
.card-link:focus-visible { outline-offset: -4px; }
.card > * { position: relative; z-index: 2; }
.card-cta { margin-top: auto; color: var(--brick); font-weight: 600; font-size: var(--fs-small); }
.cards-grid { display: grid; grid-template-columns: 1fr; gap: 1.25rem; }
@media (min-width: 640px) { .cards-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .cards-grid--3 { grid-template-columns: repeat(3, 1fr); } .cards-grid--4 { grid-template-columns: repeat(4, 1fr); } }
.card--offset-1 { transform: translateY(24px); }
.card--offset-2 { transform: translateY(-24px); }

/* ============================================
   12. PROOF STRIP
   ============================================ */
.proof-strip { background: var(--mineral-900); color: var(--mineral-100); padding: 1.25rem var(--container-x); display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; font-size: var(--fs-small); border-block: 1px solid var(--mineral-700); }
.proof-strip-dot { display: inline-block; width: 10px; height: 10px; background: var(--brick); border-radius: 50%; animation: pulse 2.4s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { box-shadow: 0 0 0 0 rgba(181,72,45,0.5); } 50% { box-shadow: 0 0 0 8px rgba(181,72,45,0); } }
@media (prefers-reduced-motion: reduce) { .proof-strip-dot { animation: none; } }

/* ============================================
   13. FORMS & MULTISTEP
   ============================================ */
.form { background: var(--mineral-50); border: 1px solid var(--mineral-300); padding: 2rem; border-radius: var(--r-md); display: flex; flex-direction: column; gap: 1.25rem; }
.form-row { display: flex; flex-direction: column; gap: 0.375rem; }
.form-row label { font-family: 'JetBrains Mono', monospace; font-size: var(--fs-micro); text-transform: uppercase; letter-spacing: var(--tr-eyebrow); color: var(--mineral-700); }
.form-row input, .form-row select, .form-row textarea {
  padding: 0.875rem 1rem; background: var(--paper);
  border: 1px solid var(--mineral-300); border-radius: var(--r-sm);
  font-family: 'Hanken Grotesk', sans-serif; font-size: var(--fs-body);
  min-height: 48px;
  transition: border-color var(--d-fast) var(--ease-out);
}
.form-row input:focus, .form-row select:focus, .form-row textarea:focus { outline: none; border-color: var(--brick); }
.form-row textarea { min-height: 120px; resize: vertical; }
.form-consent { font-size: var(--fs-micro); color: var(--mineral-700); }

.multistep { background: var(--mineral-50); border: 1px solid var(--mineral-300); border-radius: var(--r-md); overflow: hidden; }
.multistep-progress { display: flex; gap: 0.25rem; padding: 0.75rem 1rem; background: var(--mineral-100); border-bottom: 1px solid var(--mineral-300); }
.multistep-progress-step { flex: 1; height: 3px; background: var(--mineral-300); transition: background-color var(--d-norm) var(--ease-out); }
.multistep-progress-step.is-done { background: var(--brick); }
.multistep-progress-step.is-current { background: var(--mineral-700); }
.multistep-step { padding: 2rem; }
.multistep-step[hidden] { display: none; }
.multistep-step-title { font-family: 'Fraunces', serif; font-size: 1.75rem; line-height: 1.2; margin-bottom: 0.5rem; }
.multistep-step-sub { color: var(--mineral-700); margin-bottom: 1.5rem; }
.multistep-options { display: grid; grid-template-columns: 1fr; gap: 0.625rem; }
@media (min-width: 640px) { .multistep-options { grid-template-columns: 1fr 1fr; } }
.multistep-option { display: flex; flex-direction: column; gap: 0.25rem; padding: 1rem; background: var(--paper); border: 2px solid var(--mineral-300); border-radius: var(--r-sm); text-align: left; cursor: pointer; transition: border-color var(--d-fast) var(--ease-out), background-color var(--d-fast) var(--ease-out); }
.multistep-option:hover { border-color: var(--mineral-700); }
.multistep-option.is-selected { border-color: var(--brick); background: rgba(181,72,45,0.04); }
.multistep-option-label { font-weight: 600; }
.multistep-option-sub { font-size: var(--fs-micro); color: var(--mineral-700); }
.multistep-actions { display: flex; justify-content: space-between; gap: 1rem; margin-top: 1.5rem; padding-top: 1.5rem; border-top: 1px solid var(--mineral-300); }

/* ============================================
   14. BOTTOM-SHEET MOBILE
   ============================================ */
.bottom-sheet { position: fixed; left: 0; right: 0; bottom: 0; background: var(--mineral-50); z-index: var(--z-sheet); border-radius: var(--r-lg) var(--r-lg) 0 0; box-shadow: var(--sh-high); max-height: 92vh; overflow-y: auto; transform: translateY(100%); transition: transform var(--d-norm) var(--ease-out); }
.bottom-sheet.is-open { transform: translateY(0); }
.bottom-sheet[hidden] { display: none; }
.bottom-sheet-backdrop { position: fixed; inset: 0; background: rgba(28,25,22,0.5); backdrop-filter: blur(4px); z-index: calc(var(--z-sheet) - 1); opacity: 0; pointer-events: none; transition: opacity var(--d-norm) var(--ease-out); }
.bottom-sheet-backdrop.is-open { opacity: 1; pointer-events: auto; }

/* ============================================
   15. STICKY CTA MOBILE
   ============================================ */
.sticky-cta { position: fixed; left: 0; right: 0; bottom: 0; background: var(--mineral-50); border-top: 1px solid var(--mineral-300); padding: 0.75rem var(--container-x); z-index: var(--z-header); display: flex; gap: 0.625rem; transform: translateY(100%); transition: transform var(--d-norm) var(--ease-out); box-shadow: 0 -4px 16px rgba(28,25,22,0.08); }
.sticky-cta.is-visible { transform: translateY(0); }
.sticky-cta[hidden] { display: none; }
.sticky-cta .btn { flex: 1; padding: 0.75rem; min-height: 48px; }
@media (min-width: 1024px) { .sticky-cta { display: none; } }

/* ============================================
   16. CHATBOT
   ============================================ */
.chatbot-toggle { position: fixed; bottom: 5rem; right: 1rem; width: 56px; height: 56px; background: var(--brick); color: white; border-radius: 50%; z-index: var(--z-chat); display: flex; align-items: center; justify-content: center; font-size: 1.5rem; box-shadow: var(--sh-high); transition: transform var(--d-fast) var(--ease-out); }
.chatbot-toggle:hover { transform: scale(1.05); }
@media (min-width: 1024px) { .chatbot-toggle { bottom: 1.5rem; } }
.chatbot-panel { position: fixed; bottom: 5rem; right: 1rem; width: min(360px, calc(100vw - 2rem)); max-height: 70vh; background: var(--mineral-50); border-radius: var(--r-md); z-index: var(--z-chat); box-shadow: var(--sh-high); display: flex; flex-direction: column; overflow: hidden; }
.chatbot-panel[hidden] { display: none; }
.chatbot-header { background: var(--mineral-900); color: var(--mineral-100); padding: 1rem; display: flex; justify-content: space-between; align-items: center; }
.chatbot-messages { flex: 1; overflow-y: auto; padding: 1rem; display: flex; flex-direction: column; gap: 0.75rem; }
.chatbot-msg { padding: 0.75rem 1rem; border-radius: var(--r-sm); max-width: 80%; font-size: var(--fs-small); }
.chatbot-msg--bot { background: var(--mineral-100); align-self: flex-start; }
.chatbot-msg--user { background: var(--brick); color: white; align-self: flex-end; }
.chatbot-input { display: flex; gap: 0.5rem; padding: 0.75rem; border-top: 1px solid var(--mineral-300); }
.chatbot-input input { flex: 1; padding: 0.625rem 0.875rem; border: 1px solid var(--mineral-300); border-radius: var(--r-sm); }
.chatbot-options { display: flex; flex-direction: column; gap: 0.375rem; margin-top: 0.5rem; }
.chatbot-option { padding: 0.625rem 0.875rem; background: var(--paper); border: 1px solid var(--mineral-300); border-radius: var(--r-sm); font-size: var(--fs-small); text-align: left; }

/* ============================================
   17. SLIDER AVANT/APRÈS
   ============================================ */
.before-after { position: relative; width: 100%; aspect-ratio: 16 / 10; overflow: hidden; border-radius: var(--r-md); background: var(--mineral-900); cursor: ew-resize; user-select: none; touch-action: none; }
.before-after img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; pointer-events: none; }
.before-after-after { clip-path: inset(0 50% 0 0); }
.before-after-handle { position: absolute; top: 0; bottom: 0; left: 50%; width: 2px; background: var(--brick); pointer-events: none; z-index: 2; }
.before-after-handle::before { content: ''; position: absolute; top: 50%; left: 50%; width: 40px; height: 40px; background: var(--brick); border-radius: 50%; transform: translate(-50%, -50%); box-shadow: var(--sh-mid); }
.before-after-handle::after { content: '‹ ›'; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); color: white; font-family: 'Fraunces', serif; font-size: 0.875rem; font-weight: 600; z-index: 1; }
.before-after-label { position: absolute; bottom: 1rem; left: 1rem; right: 1rem; display: flex; justify-content: space-between; font-family: 'JetBrains Mono', monospace; font-size: var(--fs-micro); text-transform: uppercase; letter-spacing: var(--tr-eyebrow); color: white; z-index: 3; pointer-events: none; text-shadow: 0 1px 4px rgba(0,0,0,0.6); }

/* ============================================
   18. SIMULATEUR
   ============================================ */
.simulator { background: var(--mineral-900); color: var(--mineral-100); padding: 2.5rem; border-radius: var(--r-md); position: relative; overflow: hidden; }
.simulator-step { margin-bottom: 1.5rem; }
.simulator-label { display: block; font-family: 'JetBrains Mono', monospace; font-size: var(--fs-micro); text-transform: uppercase; letter-spacing: var(--tr-eyebrow); color: var(--brick); margin-bottom: 0.5rem; }
.simulator-options { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; }
@media (min-width: 640px) { .simulator-options--3 { grid-template-columns: 1fr 1fr 1fr; } }
.simulator-option { padding: 0.75rem 1rem; background: transparent; border: 1px solid rgba(255,255,255,0.2); color: var(--mineral-100); border-radius: var(--r-sm); font-size: var(--fs-small); cursor: pointer; transition: all var(--d-fast) var(--ease-out); }
.simulator-option:hover { border-color: rgba(255,255,255,0.5); }
.simulator-option.is-selected { background: var(--brick); border-color: var(--brick); }
.simulator-result { margin-top: 2rem; padding-top: 2rem; border-top: 1px solid rgba(255,255,255,0.12); }
.simulator-range { font-family: 'Fraunces', serif; font-size: clamp(2rem, 4vw, 3rem); color: var(--brick); line-height: 1; margin-bottom: 0.5rem; }
.simulator-disclaimer { font-size: var(--fs-micro); color: var(--mineral-300); font-style: italic; margin-bottom: 1.5rem; }

/* ============================================
   19. FAQ
   ============================================ */
.faq { display: flex; flex-direction: column; }
.faq details { border-bottom: 1px solid var(--mineral-300); padding: 1.25rem 0; }
.faq summary { display: flex; justify-content: space-between; align-items: center; font-family: 'Hanken Grotesk', sans-serif; font-weight: 600; font-size: 1.125rem; cursor: pointer; list-style: none; gap: 1rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; font-family: 'Fraunces', serif; font-size: 1.5rem; font-weight: 300; transition: transform var(--d-fast) var(--ease-out); }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq-body { padding-top: 0.75rem; color: var(--mineral-700); font-size: var(--fs-small); }

/* ============================================
   20. PROCESS 4 ÉTAPES
   ============================================ */
.process { display: grid; grid-template-columns: 1fr; gap: 1.5rem; position: relative; counter-reset: step; }
@media (min-width: 768px) { .process { grid-template-columns: repeat(4, 1fr); gap: 1rem; } }
.process-step { position: relative; padding-left: 2.5rem; }
.process-step::before { content: counter(step); counter-increment: step; position: absolute; left: 0; top: -0.25rem; width: 2rem; height: 2rem; background: var(--brick); color: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: 'Fraunces', serif; font-weight: 600; font-size: 0.875rem; }
.process-step-title { font-family: 'Hanken Grotesk', sans-serif; font-weight: 600; font-size: var(--fs-small); margin-bottom: 0.25rem; }
.process-step-desc { font-size: var(--fs-small); color: var(--mineral-700); line-height: 1.5; }
.section--dark .process-step-desc { color: var(--mineral-300); }

/* ============================================
   21. PAGE SECTIONS
   ============================================ */
.page-head { padding: clamp(7rem, 14vh, 11rem) 0 clamp(2rem, 4vw, 3rem); background: radial-gradient(ellipse at center, var(--warm-radial-center) 0%, var(--mineral-900) 60%, var(--mineral-950) 100%); color: var(--mineral-100); position: relative; overflow: hidden; }
.page-head h1 { color: var(--mineral-100); max-width: 20ch; }
.page-head .lead { color: var(--mineral-300); margin-top: 1rem; max-width: 60ch; }
.page-head-meta { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 2rem; }
.page-head-meta-item { padding: 0.375rem 0.875rem; background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.12); border-radius: 100px; font-size: var(--fs-micro); font-family: 'JetBrains Mono', monospace; letter-spacing: var(--tr-eyebrow); text-transform: uppercase; }
.section-head { margin-bottom: clamp(2rem, 4vw, 3rem); max-width: 60ch; }
.section-head h2 { margin-bottom: 0.75rem; }
.callout { background: var(--mineral-900); color: var(--mineral-100); padding: 2rem; border-radius: var(--r-md); display: flex; flex-direction: column; gap: 1rem; }
.callout-title { font-family: 'Fraunces', serif; font-size: 1.5rem; line-height: 1.2; }
.callout-text { font-size: var(--fs-small); color: var(--mineral-300); }
.sidebar-sticky { position: sticky; top: 6rem; background: var(--mineral-50); border: 1px solid var(--mineral-300); border-radius: var(--r-md); padding: 1.5rem; display: flex; flex-direction: column; gap: 1rem; font-size: var(--fs-small); }
.sidebar-sticky dt { font-family: 'JetBrains Mono', monospace; font-size: var(--fs-micro); text-transform: uppercase; letter-spacing: var(--tr-eyebrow); color: var(--mineral-700); margin-bottom: 0.125rem; }
.sidebar-sticky dd { margin: 0 0 0.75rem; color: var(--ink); }

/* ============================================
   22. UTILITAIRES MOTION (REVEAL)
   ============================================ */
.reveal { opacity: 0; transform: translateY(8px); transition: opacity var(--d-slow) var(--ease-out), transform var(--d-slow) var(--ease-out); }
.reveal.in-view { opacity: 1; transform: translateY(0); }
.reveal-stagger > * { opacity: 0; transform: translateY(8px); transition: opacity var(--d-slow) var(--ease-out), transform var(--d-slow) var(--ease-out); }
.reveal-stagger.in-view > * { opacity: 1; transform: translateY(0); }
.reveal-stagger.in-view > *:nth-child(1) { transition-delay: calc(var(--stagger) * 1); }
.reveal-stagger.in-view > *:nth-child(2) { transition-delay: calc(var(--stagger) * 2); }
.reveal-stagger.in-view > *:nth-child(3) { transition-delay: calc(var(--stagger) * 3); }
.reveal-stagger.in-view > *:nth-child(4) { transition-delay: calc(var(--stagger) * 4); }
.reveal-stagger.in-view > *:nth-child(5) { transition-delay: calc(var(--stagger) * 5); }
.reveal-stagger.in-view > *:nth-child(6) { transition-delay: calc(var(--stagger) * 6); }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
  .reveal, .reveal-stagger > * { opacity: 1 !important; transform: none !important; }
  .calepinage.animate path, .calepinage.animate line { stroke-dashoffset: 0 !important; }
}

/* ============================================
   23. UTILITAIRES TYPO
   ============================================ */
.text-center { text-align: center; }
.text-balance { text-wrap: balance; }
.mt-0 { margin-top: 0; } .mt-1 { margin-top: 0.5rem; } .mt-2 { margin-top: 1rem; } .mt-3 { margin-top: 1.5rem; } .mt-4 { margin-top: 2rem; } .mt-5 { margin-top: 3rem; } .mt-6 { margin-top: 4rem; }
.mb-0 { margin-bottom: 0; }