/* ===================================================================
   Compagnie Lessage — feuille de style
   Identité : croisement entre plan technique (ingénierie / bâtiment)
   et grille numérique (informatique / domotique).
   =================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=IBM+Plex+Sans:wght@400;500;600&display=swap');

:root {
  --paper: #eef1ec;
  --paper-dim: #e2e6dd;
  --ink: #10151a;
  --ink-soft: #46505b;
  --navy: #0d1a2b;
  --navy-soft: #16273c;
  --navy-line: rgba(238, 241, 236, 0.14);
  --gold: #c99a3b;
  --gold-dim: #a9812f;
  --green: #21594a;
  --line: rgba(16, 21, 26, 0.14);
  --radius: 2px;
  --wrap: 1180px;
  --font-head: 'Space Grotesk', 'Helvetica Neue', Arial, sans-serif;
  --font-body: 'IBM Plex Sans', 'Segoe UI', Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; }

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 600;
  line-height: 1.12;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}

p { max-width: 62ch; }
p.wide { max-width: 74ch; }

.container {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 28px;
}

/* Focus visibility */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

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

/* ---------- corner ticks (technical-drawing device) ---------- */
.ticked {
  position: relative;
}
.ticked::before,
.ticked::after,
.ticked > .tick-br,
.ticked > .tick-bl {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border: 1.5px solid currentColor;
  opacity: 0.55;
}
.ticked::before { top: 0; left: 0; border-right: none; border-bottom: none; }
.ticked::after { top: 0; right: 0; border-left: none; border-bottom: none; }

/* ---------- header / nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--navy);
  color: var(--paper);
  border-bottom: 1px solid var(--navy-line);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
}
.brand {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--paper);
}
.brand strong {
  font-family: var(--font-head);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}
.brand span {
  font-size: 0.72rem;
  color: var(--gold);
  margin-top: 2px;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--navy-line);
  color: var(--paper);
  padding: 8px 12px;
  font-family: var(--font-body);
  font-size: 0.85rem;
  cursor: pointer;
}

.main-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 2px;
  list-style: none;
  margin: 0;
  padding: 0;
  justify-content: flex-end;
}
.main-nav a {
  display: inline-block;
  text-decoration: none;
  color: var(--paper);
  font-size: 0.87rem;
  padding: 8px 12px;
  border-bottom: 2px solid transparent;
  opacity: 0.82;
  transition: opacity 0.15s ease, border-color 0.15s ease;
}
.main-nav a:hover { opacity: 1; }
.main-nav a[aria-current="page"] {
  opacity: 1;
  border-bottom-color: var(--gold);
}

@media (max-width: 900px) {
  .nav-toggle { display: inline-block; }
  .main-nav {
    display: none;
    width: 100%;
    border-top: 1px solid var(--navy-line);
  }
  .main-nav.open { display: block; }
  .main-nav ul { flex-direction: column; justify-content: flex-start; padding: 8px 0; }
  .main-nav a { border-bottom: none; border-left: 2px solid transparent; padding: 10px 4px; }
  .main-nav a[aria-current="page"] { border-left-color: var(--gold); border-bottom-color: transparent; }
  .site-header .container { flex-wrap: wrap; }
}

/* ---------- hero ---------- */
.hero {
  position: relative;
  background:
    linear-gradient(115deg, rgba(13, 26, 43, 0.93) 0%, rgba(13, 26, 43, 0.82) 28%, rgba(13, 26, 43, 0.5) 58%, rgba(13, 26, 43, 0.32) 100%),
    url('../img/fond-arches.jpg') center 40% / cover no-repeat;
  color: var(--paper);
  padding: 96px 0 84px;
  overflow: hidden;
}
.hero-grid {
  position: absolute;
  inset: 0;
  opacity: 0.28;
  background-image:
    linear-gradient(var(--navy-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--navy-line) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,0.9), transparent 85%);
}
.hero .container { position: relative; }
.hero-inner {
  max-width: 760px;
  padding: 34px 0;
}
.hero h1 {
  font-size: clamp(2.4rem, 5.4vw, 3.6rem);
  margin-bottom: 0.3em;
}
.hero .lede {
  font-size: 1.1rem;
  color: #cfd6de;
  max-width: 46ch;
  margin: 0 0 1.6em;
}
.hero p.body-text { color: #b9c2cc; }

.page-hero {
  background:
    linear-gradient(115deg, rgba(13, 26, 43, 0.93) 0%, rgba(13, 26, 43, 0.82) 32%, rgba(13, 26, 43, 0.5) 62%, rgba(13, 26, 43, 0.32) 100%),
    url('../img/fond-arches.jpg') center 36% / cover no-repeat;
  color: var(--paper);
  padding: 68px 0 58px;
  position: relative;
  overflow: hidden;
}
.page-hero .eyebrow-ref {
  color: var(--gold);
  font-size: 0.82rem;
  margin-bottom: 10px;
}
.page-hero h1 { font-size: clamp(2rem, 4.4vw, 2.7rem); }
.page-hero .lede { color: #c3cbd3; max-width: 54ch; margin-top: 0.6em; }

/* ---------- buttons ---------- */
.btn {
  display: inline-block;
  background: var(--gold);
  color: var(--navy);
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 13px 26px;
  text-decoration: none;
  border: 1px solid var(--gold);
  transition: background 0.15s ease, color 0.15s ease;
}
.btn:hover { background: transparent; color: var(--gold); }
.btn.outline {
  background: transparent;
  color: var(--paper);
  border-color: var(--navy-line);
}
.btn.outline:hover { border-color: var(--gold); color: var(--gold); }

/* ---------- sections ---------- */
section { padding: 72px 0; }
section.alt { background: var(--paper-dim); }
.section-head { max-width: 640px; margin-bottom: 40px; }
.section-head h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
.section-head .lede { color: var(--ink-soft); margin-top: 0.4em; }

hr.rule {
  border: none;
  border-top: 1px solid var(--line);
  margin: 0;
}

/* ---------- pillars / cards (square, technical panels) ---------- */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.pillar {
  background: var(--paper);
  padding: 30px 28px;
  color: var(--ink);
}
.pillar .num {
  font-family: var(--font-head);
  color: var(--gold-dim);
  font-size: 0.85rem;
  margin-bottom: 14px;
}
.pillar h3 { font-size: 1.15rem; margin-bottom: 0.5em; }
.pillar p { color: var(--ink-soft); font-size: 0.95rem; }

@media (max-width: 800px) {
  .pillars { grid-template-columns: 1fr; }
}

/* ---------- services directory grid (home) ---------- */
.dir-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.dir-card {
  background: var(--paper);
  padding: 26px 22px;
  text-decoration: none;
  color: var(--ink);
  min-height: 128px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: background 0.15s ease;
}
.dir-card:hover { background: var(--paper-dim); }
.dir-card strong {
  font-family: var(--font-head);
  font-size: 1.02rem;
}
.dir-card small { display: block; color: var(--ink-soft); font-size: 0.82rem; }
.dir-card .go { display: block; color: var(--gold-dim); font-size: 0.82rem; margin-top: 12px; }

@media (max-width: 900px) {
  .dir-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .dir-grid { grid-template-columns: 1fr; }
}

/* ---------- service lists ---------- */
.service-block { margin-bottom: 44px; }
.service-block h2 {
  font-size: 1.3rem;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 20px;
}
.check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.check-list li {
  position: relative;
  padding-left: 26px;
  color: var(--ink-soft);
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 9px;
  height: 9px;
  border: 1.5px solid var(--gold-dim);
  transform: rotate(45deg);
}
.check-list strong { color: var(--ink); font-weight: 600; }

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}
@media (max-width: 760px) {
  .two-col { grid-template-columns: 1fr; }
}

/* ---------- numbered sub-sections (multimedia — genuinely sequential in source) ---------- */
.subsection {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 18px;
  padding: 26px 0;
  border-top: 1px solid var(--line);
}
.subsection:last-child { border-bottom: 1px solid var(--line); }
.subsection .idx {
  font-family: var(--font-head);
  font-size: 1.4rem;
  color: var(--gold-dim);
}
.subsection h3 { font-size: 1.1rem; margin-bottom: 0.4em; }
.subsection p, .subsection ul { color: var(--ink-soft); }
.subsection ul { padding-left: 20px; margin: 0.4em 0 0; }

/* ---------- partners / references ---------- */
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 6px;
}
.tag {
  border: 1px solid var(--line);
  padding: 8px 14px;
  font-size: 0.88rem;
  color: var(--ink-soft);
}
.ref-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px 32px;
  margin-top: 8px;
  padding: 0;
  list-style: none;
}
.ref-list li {
  padding: 14px 0;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.94rem;
}
.ref-list li .who { color: var(--ink-soft); font-weight: 600; }
.ref-list li .what { color: var(--ink-soft); text-align: right; }
@media (max-width: 700px) {
  .ref-list { grid-template-columns: 1fr; }
  .ref-list li { flex-direction: column; }
  .ref-list li .what { text-align: left; }
}

/* ---------- contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.contact-panel { background: var(--paper); padding: 34px; }
.contact-panel dt {
  font-family: var(--font-head);
  font-size: 0.82rem;
  color: var(--gold-dim);
  margin-top: 20px;
}
.contact-panel dt:first-child { margin-top: 0; }
.contact-panel dd { margin: 4px 0 0; color: var(--ink); }
@media (max-width: 760px) {
  .contact-grid { grid-template-columns: 1fr; }
}

/* ---------- cta strip ---------- */
.cta-strip {
  background: var(--green);
  color: var(--paper);
  padding: 54px 0;
}
.cta-strip .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.cta-strip h2 { font-size: 1.5rem; margin: 0; }
.cta-strip p { color: #d3e2dc; margin: 6px 0 0; }

/* ---------- footer ---------- */
.site-footer {
  background: var(--navy);
  color: #aab4bf;
  padding: 48px 0 28px;
  font-size: 0.9rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 36px;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--navy-line);
}
.footer-grid h4 {
  font-family: var(--font-head);
  color: var(--paper);
  font-size: 0.88rem;
  margin-bottom: 14px;
}
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 8px; }
.footer-grid a { text-decoration: none; color: #aab4bf; }
.footer-grid a:hover { color: var(--gold); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: 22px;
  font-size: 0.82rem;
  color: #7d8794;
}
@media (max-width: 760px) {
  .footer-grid { grid-template-columns: 1fr; }
}


/* ===================================================================
   MODERNISATION DYNAMIQUE — sans changement de structure ni d'arrière-plan
   Animations légères, micro-interactions et effets de profondeur.
   =================================================================== */

:root{
  --motion-fast: 180ms;
  --motion: 420ms;
  --motion-slow: 760ms;
}

/* Barre de progression de lecture */
.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  width:0;
  height:3px;
  z-index:100;
  background:var(--gold);
  transform-origin:left center;
  box-shadow:0 0 14px rgba(201,154,59,.45);
  pointer-events:none;
}

/* Header plus vivant, sans modifier sa hauteur */
.site-header{
  transition:box-shadow var(--motion) ease, background-color var(--motion) ease;
}
.site-header.is-scrolled{
  box-shadow:0 10px 30px rgba(0,0,0,.18);
}
.brand{
  transition:transform var(--motion-fast) ease;
}
.brand:hover{ transform:translateY(-1px); }
.main-nav a{
  position:relative;
  overflow:hidden;
  transition:opacity var(--motion-fast) ease, color var(--motion-fast) ease, border-color var(--motion-fast) ease, transform var(--motion-fast) ease;
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:3px;
  height:1px;
  background:var(--gold);
  transform:scaleX(0);
  transform-origin:right;
  transition:transform var(--motion) cubic-bezier(.2,.7,.2,1);
}
.main-nav a:hover{ transform:translateY(-1px); }
.main-nav a:hover::after,
.main-nav a[aria-current="page"]::after{
  transform:scaleX(1);
  transform-origin:left;
}

/* Entrées progressives */
[data-reveal]{
  opacity:0;
  transform:translateY(22px);
  transition:opacity var(--motion-slow) ease, transform var(--motion-slow) cubic-bezier(.2,.7,.2,1);
  transition-delay:var(--reveal-delay,0ms);
}
[data-reveal="left"]{ transform:translateX(-24px); }
[data-reveal="right"]{ transform:translateX(24px); }
[data-reveal="scale"]{ transform:scale(.96); }
[data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* Apparition du contenu héroïque */
.hero-inner > *,
.page-hero .container > *{
  animation:heroEnter .75s cubic-bezier(.2,.75,.2,1) both;
}
.hero-inner > *:nth-child(2){ animation-delay:90ms; }
.hero-inner > *:nth-child(3){ animation-delay:170ms; }
.hero-inner > *:nth-child(4){ animation-delay:250ms; }
.page-hero .eyebrow-ref{ animation-delay:70ms; }
.page-hero h1{ animation-delay:150ms; }
.page-hero .lede{ animation-delay:230ms; }

@keyframes heroEnter{
  from{ opacity:0; transform:translateY(18px); }
  to{ opacity:1; transform:none; }
}

/* Boutons */
.btn{
  position:relative;
  overflow:hidden;
  isolation:isolate;
  transition:transform var(--motion-fast) ease, box-shadow var(--motion-fast) ease, background-color var(--motion-fast) ease, color var(--motion-fast) ease, border-color var(--motion-fast) ease;
}
.btn::before{
  content:"";
  position:absolute;
  top:-80%;
  left:-35%;
  width:28%;
  height:260%;
  background:rgba(255,255,255,.24);
  transform:rotate(18deg) translateX(-180%);
  transition:transform .7s ease;
  z-index:-1;
}
.btn:hover{
  transform:translateY(-3px);
  box-shadow:0 10px 24px rgba(13,26,43,.16);
}
.btn:hover::before{ transform:rotate(18deg) translateX(620%); }

/* Cartes et blocs */
.pillar,
.dir-card,
.contact-panel,
.tag,
.subsection{
  transition:transform var(--motion) cubic-bezier(.2,.7,.2,1),
             box-shadow var(--motion) ease,
             background-color var(--motion) ease,
             border-color var(--motion) ease;
}
.pillar:hover{
  transform:translateY(-7px);
  box-shadow:0 16px 34px rgba(13,26,43,.10);
  position:relative;
  z-index:2;
}
.dir-card{
  position:relative;
  overflow:hidden;
}
.dir-card::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:100%;
  height:3px;
  background:var(--gold);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform var(--motion) cubic-bezier(.2,.7,.2,1);
}
.dir-card:hover{
  transform:translateY(-5px);
  box-shadow:0 14px 28px rgba(13,26,43,.10);
  z-index:2;
}
.dir-card:hover::after{ transform:scaleX(1); }
.dir-card .go{
  transition:transform var(--motion-fast) ease, color var(--motion-fast) ease;
}
.dir-card:hover .go{
  color:var(--gold);
  transform:translateX(5px);
}
.contact-panel:hover{
  box-shadow:0 14px 30px rgba(13,26,43,.08);
}
.tag:hover{
  transform:translateY(-3px);
  border-color:var(--gold-dim);
  box-shadow:0 8px 18px rgba(13,26,43,.07);
}
.subsection:hover{
  transform:translateX(5px);
  padding-left:8px;
  border-top-color:var(--gold-dim);
}

/* Numéros des piliers : petite pulsation au survol */
.pillar .num{
  transition:letter-spacing var(--motion) ease, color var(--motion) ease;
}
.pillar:hover .num{
  letter-spacing:.08em;
  color:var(--gold);
}

/* CTA */
.cta-strip{
  position:relative;
  overflow:hidden;
}
.cta-strip .container{
  position:relative;
  z-index:1;
}
.cta-strip h2{
  transition:transform var(--motion) ease;
}
.cta-strip:hover h2{ transform:translateX(4px); }

/* Liens de contact */
.contact-panel a{
  transition:color var(--motion-fast) ease, letter-spacing var(--motion-fast) ease;
}
.contact-panel a:hover{
  color:var(--gold-dim);
  letter-spacing:.01em;
}

/* Footer */
.site-footer a{
  transition:color var(--motion-fast) ease, transform var(--motion-fast) ease;
}
.site-footer li a:hover{
  display:inline-block;
  transform:translateX(3px);
}

/* Petit indicateur d'interaction dans le hero, sans toucher à l'arrière-plan */
.hero-inner{
  position:relative;
}
.hero-inner::after{
  content:"";
  display:block;
  width:54px;
  height:1px;
  margin-top:32px;
  background:var(--gold);
  transform-origin:left;
  animation:linePulse 2.8s ease-in-out infinite;
}
@keyframes linePulse{
  0%,100%{ transform:scaleX(.55); opacity:.55; }
  50%{ transform:scaleX(1); opacity:1; }
}

/* Responsive : conserver la disposition originale */
@media (max-width:900px){
  .main-nav a::after{ display:none; }
}
@media (prefers-reduced-motion:reduce){
  [data-reveal],
  .hero-inner > *,
  .page-hero .container > *{ opacity:1; transform:none; animation:none !important; }
  .hero-inner::after{ animation:none; }
}