/* ==========================================================================
   auditlogement.be — Optinergie SRL
   Design language: "dossier technique" — the visual grammar of a PEB / audit
   report. Signature element: the vertical échelle énergétique (A→G) that
   recurs as the site's spine.
   ========================================================================== */

:root{
  --ink:        #17231B;
  --ink-soft:   #47543C;
  --ink-faint:  #6E7A63;
  --paper:      #F1F2EA;
  --paper-raised: #E7E8DC;
  --paper-deep: #DEE0D0;
  --paper-green: #E1EADB;
  --paper-green-line: #C3D3BB;
  --line:       #C7CBB9;
  --line-soft:  #D8DACB;
  --copper:     #AE4E28;
  --copper-dark:#8C3D1E;
  --copper-soft:#F1E3D8;

  --label-a: #2E7D46;
  --label-b: #5C9A3F;
  --label-c: #9BAE3D;
  --label-d: #D8BC33;
  --label-e: #DE9236;
  --label-f: #D2632C;
  --label-g: #BB3327;

  --serif: "Fraunces", "Source Serif 4", Georgia, serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", "SF Mono", Menlo, monospace;

  --max: 1180px;
  --gutter: clamp(20px, 5vw, 64px);
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body{
  margin:0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

.wrap{
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ---------- Typography ---------- */
h1,h2,h3{
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--ink);
}
h1{ font-size: clamp(2.1rem, 4.6vw, 3.6rem); font-weight: 560; }
h2{ font-size: clamp(1.6rem, 3vw, 2.4rem); }
h3{ font-size: 1.15rem; font-weight: 650; }

.eyebrow{
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--copper-dark);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before{
  content:"";
  width: 18px; height: 1px;
  background: var(--copper-dark);
  display:inline-block;
}

p{ margin: 0 0 1em; color: var(--ink-soft); }
p:last-child{ margin-bottom: 0; }

.lede{ font-size: 1.08rem; max-width: 46em; color: var(--ink-soft); }

/* ---------- Buttons / links ---------- */
.btn{
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: 3px;
  border: 1px solid transparent;
  transition: background .15s ease, color .15s ease, border-color .15s ease, transform .1s ease;
  white-space: nowrap;
}
.btn:active{ transform: translateY(1px); }
.btn-primary{
  background: var(--copper);
  color: #FBF6F0;
}
.btn-primary:hover{ background: var(--copper-dark); }
.btn-ghost{
  border-color: var(--ink);
  color: var(--ink);
  background: transparent;
}
.btn-ghost:hover{ background: var(--ink); color: var(--paper); }
.btn-text{
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--copper-dark);
  text-decoration: none;
  border-bottom: 1px solid var(--copper);
  padding-bottom: 2px;
}
.btn-text:hover{ color: var(--copper-dark); border-color: var(--copper-dark); }

/* ---------- Header ---------- */
header{
  position: sticky; top:0; z-index: 50;
  background: rgba(241,242,234,0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding: 18px var(--gutter);
  max-width: var(--max); margin: 0 auto;
}
.brand{ display:flex; flex-direction:column; gap:2px; text-decoration:none; }
.brand-name{
  font-family: var(--mono); font-size: 0.95rem; font-weight:600;
  letter-spacing: 0.01em; color: var(--ink);
}
.brand-sub{
  font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--ink-faint);
}

/* ---------- PEB scale — the signature element ---------- */
.peb-scale{
  display:flex; flex-direction:column;
  width: 34px;
  border-radius: 3px; overflow:hidden;
  border: 1px solid var(--line);
  flex-shrink:0;
}
.peb-scale span{
  font-family: var(--mono); font-size: 0.62rem; font-weight:700;
  color: #fff; text-align:center; padding: 5px 0;
  position: relative;
}
.peb-scale span.active{ outline: 2px solid var(--ink); outline-offset: -2px; }
.peb-a{ background: var(--label-a);} .peb-b{ background: var(--label-b);}
.peb-c{ background: var(--label-c);} .peb-d{ background: var(--label-d); color:#3a2f0c!important;}
.peb-e{ background: var(--label-e);} .peb-f{ background: var(--label-f);}
.peb-g{ background: var(--label-g);}

/* ---------- Hero ---------- */
.hero{
  padding: clamp(48px, 8vw, 96px) var(--gutter) clamp(56px, 9vw, 110px);
  border-bottom: 1px solid var(--line);
}
.hero-inner{
  max-width: var(--max); margin: 0 auto;
  display:grid; grid-template-columns: 46px 1fr; gap: clamp(24px, 4vw, 56px);
  align-items: start;
}
.hero-scale{ padding-top: 8px; }
.hero-scale .peb-scale{ width: 46px; height: 100%; }
.hero-scale .peb-scale span{ padding: 14px 0; font-size: 0.68rem; }
.hero-scale-caption{
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.1em;
  color: var(--ink-faint); margin-top: 10px; text-transform: uppercase;
  display:none;
}
.hero-content{ max-width: 44em; }
.hero-content .eyebrow{ margin-bottom: 22px; }
.hero-content h1{ margin-bottom: 22px; }
.hero-content .lede{ margin-bottom: 32px; }
.hero-ctas{ display:flex; flex-wrap:wrap; gap: 14px; margin-bottom: 44px; }
.hero-stats{ display:flex; gap: clamp(28px, 5vw, 56px); flex-wrap:wrap; border-top: 1px solid var(--line); padding-top: 26px; }
.stat-num{ font-family: var(--serif); font-size: 1.9rem; font-weight:600; color: var(--ink); display:block; }
.stat-label{ font-family: var(--mono); font-size: 0.72rem; color: var(--ink-faint); text-transform:uppercase; letter-spacing:.04em; }

/* ---------- Section shell ---------- */
section{ padding: clamp(56px, 8vw, 96px) var(--gutter); border-bottom: 1px solid var(--line); }
section:last-of-type{ border-bottom:none; }

/* Zones en fond vert — rythment la page et font ressortir les blocs clés */
section.section-green{
  background: var(--paper-green);
  border-top: 1px solid var(--paper-green-line);
  border-bottom: 1px solid var(--paper-green-line);
}
.section-green .callout{ background: #D3E1CA; border-color: var(--paper-green-line); }
.section-green .persona-card{ background: #EAF1E4; border-color: var(--paper-green-line); }
.section-green .feature-grid{ background: var(--paper-green-line); border-color: var(--paper-green-line); }
.section-green .feature-card{ background: var(--paper-green); }
.section-green .points-list li{ border-bottom-color: var(--paper-green-line); }
.section-green table thead th{ border-bottom-color: var(--ink); }
.section-green tbody td{ border-bottom-color: var(--paper-green-line); }
.section-green tbody tr:hover{ background: #D3E1CA; }
.section-green .step{ border-top-color: var(--ink); }
.section-green .faq-item{ border-color: var(--paper-green-line); }
.section-green .price-note{ background: #EFDFCF; }
.section-inner{ max-width: var(--max); margin: 0 auto; }
.section-head{ max-width: 42em; margin-bottom: clamp(32px, 5vw, 52px); }
.section-head .eyebrow{ margin-bottom: 14px; }
.section-head h2{ margin-bottom: 16px; }

.two-col{ display:grid; grid-template-columns: 1fr 1fr; gap: clamp(28px, 5vw, 64px); align-items:start; }

.sources{ display:flex; gap: 20px; flex-wrap:wrap; margin-top: 22px; }

/* ---------- Context callout card ---------- */
.callout{
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 28px;
}
.callout h3{ margin-bottom: 10px; }

/* ---------- Aides / table ---------- */
.timeline-note{
  font-family: var(--mono); font-size: 0.75rem; color: var(--copper-dark);
  text-transform: uppercase; letter-spacing: .06em; margin-bottom: 14px; display:block;
}
.points-list{ list-style:none; margin: 0 0 36px; padding:0; display:grid; gap: 14px; }
.points-list li{
  display:flex; gap: 14px; align-items:flex-start;
  padding-bottom: 14px; border-bottom: 1px solid var(--line-soft);
  color: var(--ink-soft);
}
.points-list li:last-child{ border-bottom:none; padding-bottom:0; }
.points-list li::before{
  content:"§"; font-family: var(--mono); color: var(--copper); font-weight:700; flex-shrink:0;
}

table{ width:100%; border-collapse: collapse; font-size: 0.92rem; }
caption{ text-align:left; font-family: var(--mono); font-size:0.72rem; color: var(--ink-faint); text-transform:uppercase; letter-spacing:.06em; margin-bottom:10px; }
thead th{
  font-family: var(--mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing:.05em;
  text-align:left; padding: 10px 14px; color: var(--ink-faint); border-bottom: 1px solid var(--ink);
}
tbody td{ padding: 13px 14px; border-bottom: 1px solid var(--line-soft); color: var(--ink-soft); }
tbody tr:hover{ background: var(--paper-raised); }
td.cat{ font-family: var(--mono); font-weight:700; color: var(--ink); }
.table-note{ font-size: 0.82rem; color: var(--ink-faint); margin-top: 14px; }

/* ---------- Personas ---------- */
.persona-card{
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 30px;
  background: var(--paper);
  display:flex; flex-direction:column; height:100%;
}
.persona-tag{
  font-family: var(--mono); font-size: 0.68rem; text-transform:uppercase; letter-spacing:.06em;
  color: var(--copper-dark); margin-bottom: 14px;
}
.persona-card h3{ margin-bottom: 12px; }
.persona-note{
  margin-top: auto; padding-top: 18px; font-style: italic; color: var(--ink);
  font-family: var(--serif); font-size: 1rem; border-top: 1px solid var(--line-soft);
}

/* ---------- Feature grid ---------- */
.feature-grid{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.feature-card{ background: var(--paper); padding: 30px; }
.feature-num{ font-family: var(--mono); font-size: 0.72rem; color: var(--copper); margin-bottom: 14px; display:block; }
.feature-card h3{ margin-bottom: 10px; }
.feature-card p{ font-size: 0.94rem; }

/* ---------- Parcours steps ---------- */
.steps{ display:grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.step{ position:relative; padding-top: 20px; border-top: 2px solid var(--ink); }
.step-num{ font-family: var(--serif); font-size: 1.6rem; color: var(--copper); display:block; margin-bottom: 12px; }
.step h3{ margin-bottom: 8px; font-size: 1.05rem; }
.step p{ font-size: 0.92rem; }

/* ---------- About ---------- */
.about-grid{ display:grid; grid-template-columns: 1.3fr 1fr; gap: clamp(28px, 5vw, 64px); align-items:start; }
.about-stats{ display:flex; flex-direction:column; gap: 22px; }
.about-stat{ border-left: 2px solid var(--copper); padding-left: 18px; }
.price-note{
  margin-top: 26px; padding: 18px 20px; background: var(--copper-soft);
  border-radius: 4px; font-family: var(--mono); font-size: 0.85rem; color: var(--copper-dark);
}

/* ---------- FAQ ---------- */
.faq-list{ display:flex; flex-direction:column; }
.faq-item{ border-bottom: 1px solid var(--line); }
.faq-item:first-child{ border-top: 1px solid var(--line); }
.faq-q{
  width:100%; text-align:left; background:none; border:none; cursor:pointer;
  padding: 22px 0; display:flex; justify-content:space-between; align-items:center; gap: 20px;
  font-family: var(--serif); font-size: 1.08rem; color: var(--ink); font-weight:600;
}
.faq-q .plus{ font-family: var(--mono); font-size: 1.1rem; color: var(--copper); flex-shrink:0; transition: transform .2s ease; }
.faq-item[open] .plus{ transform: rotate(45deg); }
.faq-a{ padding: 0 0 24px; max-width: 46em; }
.faq-item summary{ list-style:none; }
.faq-item summary::-webkit-details-marker{ display:none; }

/* ---------- Final CTA ---------- */
.final-cta{ text-align:left; }
.final-cta .section-head{ max-width: 40em; margin-bottom: 34px; }
.final-ctas{ display:flex; gap:16px; flex-wrap:wrap; align-items:center; }
.final-phone{ font-family: var(--mono); font-size: 0.95rem; color: var(--ink-soft); text-decoration:none; }

/* ---------- Footer ---------- */
footer{ padding: 26px var(--gutter); }
.footer-inner{
  max-width: var(--max); margin:0 auto; display:flex; justify-content:space-between;
  align-items:center; flex-wrap:wrap; gap: 10px;
  font-family: var(--mono); font-size: 0.72rem; color: var(--ink-faint);
}

/* ---------- Reveal-on-scroll ---------- */
.reveal{ opacity:0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
.reveal.in{ opacity:1; transform:none; }

/* ---------- Responsive ---------- */
@media (max-width: 880px){
  .two-col, .about-grid{ grid-template-columns: 1fr; }
  .feature-grid{ grid-template-columns: 1fr 1fr; }
  .steps{ grid-template-columns: 1fr 1fr; }
  .hero-inner{ grid-template-columns: 1fr; }
  .hero-scale{ display:none; }
}
@media (max-width: 560px){
  .feature-grid{ grid-template-columns: 1fr; }
  .steps{ grid-template-columns: 1fr; }
  .header-inner .btn span.long{ display:none; }
}