/* =========================================================
   stconseil.immo — styles partagés
   Direction : "le langage du tableau électrique"
   ========================================================= */

:root {
  --ink: #1A1D1F;
  --paper: #F7F6F3;
  --steel: #5B6770;
  --signal: #FF6B35;
  --line: #D8D5CE;
  --success: #2D6E4E;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: 'Inter', sans-serif;
  line-height: 1.5;
}

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 32px; }

a { color: inherit; }

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

/* ===== HEADER ===== */
header {
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: var(--paper);
  z-index: 50;
}
.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 76px;
}
.logo {
  font-family: 'Archivo', sans-serif;
  font-weight: 700;
  font-size: 19px;
  letter-spacing: -0.01em;
  text-decoration: none;
}
.logo span { color: var(--signal); }
nav { display: flex; gap: 32px; align-items: center; }
nav a {
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
}
nav a.active { color: var(--signal); }
.nav-ref {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--steel);
  margin-right: 6px;
}
.btn-primary {
  background: var(--ink);
  color: var(--paper);
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  border: none;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}
.btn-primary:hover { background: var(--signal); }

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  cursor: pointer;
  color: var(--ink);
}

/* ===== HERO (sous-pages) ===== */
.hero-sub-page {
  border-bottom: 1px solid var(--line);
  padding: 64px 0 72px;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  background-position: -1px -1px;
  position: relative;
}
.hero-sub-page::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, var(--paper) 0%, rgba(247,246,243,0.35) 45%, var(--paper) 100%);
  pointer-events: none;
}
.hero-sub-page .hero-content { position: relative; max-width: 760px; }

.eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--steel);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
  letter-spacing: 0.02em;
}
.eyebrow .dot {
  width: 7px;
  height: 7px;
  background: var(--signal);
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}

h1 {
  font-family: 'Archivo', sans-serif;
  font-weight: 700;
  font-size: 44px;
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin-bottom: 24px;
}
h1.home-h1 { font-size: 56px; line-height: 1.08; }

.accent-underline { position: relative; display: inline-block; }
.accent-underline::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 4px;
  width: 100%;
  height: 8px;
  background: var(--signal);
  opacity: 0.18;
  z-index: -1;
}

.hero-sub {
  font-size: 18px;
  color: var(--steel);
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.55;
}

.hero-cta { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.btn-lg {
  background: var(--ink);
  color: var(--paper);
  padding: 16px 28px;
  font-size: 15px;
  font-weight: 500;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.btn-lg:hover { background: var(--signal); }
.btn-lg .arrow { font-family: 'IBM Plex Mono', monospace; }

.link-ghost {
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 2px;
}
.link-ghost:hover { border-color: var(--signal); color: var(--signal); }

/* ===== SECTION MARKER ===== */
.section-marker {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 44px;
}
.marker-ref {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--signal);
  white-space: nowrap;
}
.marker-line { flex: 1; height: 1px; background: var(--line); }

.section { padding: 88px 0; border-bottom: 1px solid var(--line); }
.section.tight { padding: 64px 0; }
.section h2 {
  font-family: 'Archivo', sans-serif;
  font-weight: 600;
  font-size: 28px;
  letter-spacing: -0.01em;
  max-width: 680px;
  margin-bottom: 56px;
}
.section .lede {
  font-size: 16px;
  color: var(--steel);
  max-width: 640px;
  margin-bottom: 40px;
  line-height: 1.65;
}

/* ===== GRID FACTS / 3-col ===== */
.facts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line);
}
.fact {
  padding: 32px 28px;
  border-right: 1px solid var(--line);
}
.fact:last-child { border-right: none; }
.fact-num {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--steel);
  display: block;
  margin-bottom: 18px;
}
.fact-num .seg { color: var(--signal); }
.fact p { font-size: 16px; line-height: 1.5; }
.fact strong { font-weight: 600; display: block; font-size: 17px; margin-bottom: 6px; }

/* ===== CARD GRID (audiences, valeurs) ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid var(--line);
}
.card-grid.two-col { grid-template-columns: repeat(2, 1fr); }
.audience-card {
  padding: 32px 28px;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--ink);
  transition: background 0.15s;
}
.audience-card:hover { background: rgba(255,107,53,0.04); }
.audience-card:last-child { border-right: none; }
.audience-card .ac-ref {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--signal);
  margin-bottom: 16px;
}
.audience-card h3 {
  font-family: 'Archivo', sans-serif;
  font-weight: 600;
  font-size: 19px;
  margin-bottom: 12px;
}
.audience-card p {
  font-size: 14px;
  color: var(--steel);
  line-height: 1.55;
  flex: 1;
  margin-bottom: 18px;
}
.audience-card .ac-link {
  font-size: 13px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ===== STEPS (4 étapes) ===== */
.steps-list { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); }
.step { padding: 28px 24px; border-right: 1px solid var(--line); }
.step:last-child { border-right: none; }
.step-num {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 22px;
  color: var(--line);
  font-weight: 500;
  display: block;
  margin-bottom: 18px;
}
.step h4 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.step p { font-size: 14px; color: var(--steel); line-height: 1.55; }

/* ===== APPORTS (liste avec ligne) ===== */
.apports-list { border-top: 1px solid var(--line); }
.apport-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 32px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}
.apport-item h4 {
  font-size: 17px;
  font-weight: 600;
  font-family: 'Archivo', sans-serif;
}
.apport-item p { font-size: 15px; color: var(--steel); line-height: 1.6; max-width: 600px; }
.apport-item .apport-link {
  display: inline-block;
  margin-top: 10px;
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  border-bottom: 1px solid var(--ink);
}
.apport-item .apport-link:hover { color: var(--signal); border-color: var(--signal); }

/* ===== SITUATIONS TYPIQUES ===== */
.situations-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.situations-grid.three { grid-template-columns: repeat(3, 1fr); }
.situation {
  background: var(--paper);
  padding: 32px 28px;
}
.situation .sit-ref {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--steel);
  margin-bottom: 14px;
  display: block;
}
.situation h4 { font-size: 16px; font-weight: 600; margin-bottom: 10px; }
.situation p { font-size: 14px; color: var(--steel); line-height: 1.6; }

/* ===== PRODUCT SHEET ===== */
.product-sheet {
  display: grid;
  grid-template-columns: 280px 1fr;
  border: 1px solid var(--line);
  margin-bottom: 1px;
}
.product-photo {
  aspect-ratio: 1 / 1;
  background:
    linear-gradient(45deg, var(--line) 25%, transparent 25%, transparent 75%, var(--line) 75%),
    linear-gradient(45deg, var(--line) 25%, transparent 25%, transparent 75%, var(--line) 75%);
  background-size: 16px 16px;
  background-position: 0 0, 8px 8px;
  background-color: #FFFFFF;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  position: relative;
}
.product-photo img { width: 100%; height: 100%; object-fit: cover; }
.product-photo .ph-icon {
  width: 36px; height: 36px;
  border: 1.5px solid var(--steel);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 14px; color: var(--steel);
}
.product-photo .ph-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.04em;
  color: var(--steel);
  text-align: center;
  max-width: 180px;
  line-height: 1.6;
}
.product-photo .ph-corner {
  position: absolute; top: 12px; left: 12px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px; color: var(--signal);
}
.product-info { padding: 32px 36px; }
.product-info .pi-ref {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px; color: var(--signal);
  margin-bottom: 10px; display: block;
}
.product-info h3 {
  font-family: 'Archivo', sans-serif;
  font-weight: 600; font-size: 22px;
  margin-bottom: 14px;
}
.product-info p {
  font-size: 15px; color: var(--steel);
  line-height: 1.6; max-width: 480px;
}
.spec-row {
  display: flex; gap: 28px; flex-wrap: wrap;
  border-top: 1px solid var(--line);
  padding-top: 16px; margin-top: 18px;
}
.spec-item { font-size: 13px; }
.spec-item .spec-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px; color: var(--steel);
  display: block; margin-bottom: 4px;
}

/* ===== CTA FINAL ===== */
.cta-final {
  text-align: center;
  padding: 96px 0;
  border-bottom: 1px solid var(--line);
}
.cta-final .marker-ref { display: block; text-align: center; margin-bottom: 24px; }
.cta-final h2 {
  margin: 0 auto 16px;
  text-align: center;
}
.cta-final p {
  color: var(--steel);
  font-size: 16px;
  max-width: 460px;
  margin: 0 auto 32px;
}

/* ===== FORMULAIRE ===== */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.form-field { margin-bottom: 24px; }
.form-field.full { grid-column: 1 / -1; }
.form-field label {
  display: block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--steel);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}
.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: #FFFFFF;
  padding: 12px 14px;
  font-family: 'Inter', sans-serif;
  font-size: 15px;
  color: var(--ink);
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--signal);
}
.form-field textarea { resize: vertical; min-height: 90px; }
.form-field input[type="file"] {
  border-style: dashed;
  cursor: pointer;
  font-size: 13px;
}
.form-submit {
  background: var(--ink);
  color: var(--paper);
  padding: 16px 32px;
  font-size: 15px;
  font-weight: 500;
  border: none;
  cursor: pointer;
}
.form-submit:hover { background: var(--signal); }

.dont-do-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border: 1px solid var(--line);
}
.dont-do-col { padding: 28px 32px; }
.dont-do-col:first-child { border-right: 1px solid var(--line); }
.dont-do-col .ddc-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--steel);
  margin-bottom: 16px;
  display: block;
}
.dont-do-col ul { list-style: none; }
.dont-do-col li {
  font-size: 14px;
  padding-left: 20px;
  position: relative;
  margin-bottom: 10px;
  line-height: 1.5;
  color: var(--steel);
}
.dont-do-col li::before {
  content: '×';
  position: absolute;
  left: 0;
  color: var(--steel);
  font-weight: 600;
}
.dont-do-col.do li::before { content: '✓'; color: var(--success); }
.dont-do-col.do li { color: var(--ink); }

/* ===== FOOTER ===== */
footer {
  padding: 56px 0 32px;
}
.footer-top {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 24px;
}
.footer-col h5 {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--steel);
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}
.footer-col a, .footer-col p {
  display: block;
  font-size: 14px;
  text-decoration: none;
  margin-bottom: 10px;
  color: var(--ink);
}
.footer-col a:hover { color: var(--signal); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--steel);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 860px) {
  h1 { font-size: 32px; }
  h1.home-h1 { font-size: 36px; }
  nav { display: none; }
  .mobile-toggle { display: block; }
  .facts-grid, .card-grid, .steps-list { grid-template-columns: 1fr; }
  .card-grid.two-col { grid-template-columns: 1fr; }
  .fact, .audience-card, .step { border-right: none; border-bottom: 1px solid var(--line); }
  .fact:last-child, .audience-card:last-child, .step:last-child { border-bottom: none; }
  .apport-item { grid-template-columns: 1fr; gap: 12px; }
  .situations-grid, .situations-grid.three { grid-template-columns: 1fr; }
  .product-sheet { grid-template-columns: 1fr; }
  .product-photo { border-right: none; border-bottom: 1px solid var(--line); }
  .form-grid { grid-template-columns: 1fr; }
  .dont-do-grid { grid-template-columns: 1fr; }
  .dont-do-col:first-child { border-right: none; border-bottom: 1px solid var(--line); }
  .footer-top { flex-direction: column; gap: 24px; }
}