/* ==========================================================================
   TOKENS
   ========================================================================== */
:root{
  /* Couleurs — brief : bleu nuit/acier, anthracite, touches orange/jaune */
  --color-ink:        #0E1720;   /* bleu nuit / acier — header, footer */
  --color-steel:      #16212C;   /* variante plus douce du bleu nuit */
  --color-anthracite: #232B33;   /* gris anthracite — bandes de contraste */
  --color-paper:      #F2F2ED;   /* fond clair, lecture confortable */
  --color-paper-2:    #E8E7DF;   /* fond clair secondaire (sections mutées) */
  --color-line:       #3A4756;   /* hairlines sur fond sombre */
  --color-line-light: #D8D6CB;   /* hairlines sur fond clair */
  --color-text-dark:  #12181F;   /* texte sur fond clair */
  --color-text-light: #EDEEEE;   /* texte sur fond sombre */
  --color-text-muted: #5B6470;   /* texte secondaire sur fond clair */
  --color-orange:     #FF6A1A;   /* CTA principal */
  --color-orange-dark:#E65A0F;
  --color-yellow:     #FFC53D;   /* accent rare */
  --color-blueprint:  #5FD8E0;   /* lignes techniques du hero uniquement */

  /* Typo */
  --font-display: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --font-body:    "Inter", "Helvetica Neue", Arial, sans-serif;
  --font-mono:    "IBM Plex Mono", "Courier New", monospace;

  /* Échelle */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6rem;

  --radius-sm: 6px;
  --radius-md: 10px;

  --header-height: 84px;
  --max-width: 1180px;
}

/* ==========================================================================
   RESET & BASE
   ========================================================================== */
*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 16px); }
body{
  margin: 0;
  background: var(--color-paper);
  color: var(--color-text-dark);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }
ul{ list-style: none; margin: 0; padding: 0; }
h1, h2, h3{ font-family: var(--font-display); line-height: 1.15; margin: 0 0 var(--space-2); letter-spacing: -0.01em; }
p{ margin: 0 0 var(--space-2); }

:focus-visible{
  outline: 3px solid var(--color-orange);
  outline-offset: 3px;
}

.skip-link{
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-orange);
  color: #fff;
  padding: 12px 20px;
  z-index: 1000;
  border-radius: var(--radius-sm);
}
.skip-link:focus{ left: 16px; top: 16px; }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *, *::before, *::after{ animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

/* ==========================================================================
   BOUTONS
   ========================================================================== */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}
.btn:hover{ transform: translateY(-1px); }
.btn--cta{ background: var(--color-orange); color: #fff; }
.btn--cta:hover{ background: var(--color-orange-dark); }
.btn--large{ padding: 1.05rem 2.1rem; font-size: 1.02rem; }
.btn--small{ padding: 0.55rem 1.1rem; font-size: 0.85rem; }
.btn--ghost{ background: transparent; border-color: var(--color-line); color: var(--color-text-dark); }
.btn--ghost:hover{ border-color: var(--color-orange); color: var(--color-orange); }
.btn--outline{ background: transparent; border-color: var(--color-ink); color: var(--color-ink); }
.btn--outline:hover{ background: var(--color-ink); color: #fff; }

/* ==========================================================================
   HEADER (fixe)
   ========================================================================== */
.site-header{
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-height);
  background: var(--color-ink);
  color: var(--color-text-light);
  z-index: 500;
  border-bottom: 1px solid var(--color-line);
}
.site-header__inner{
  max-width: var(--max-width);
  margin: 0 auto;
  height: 100%;
  padding: 0 var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
main{ padding-top: var(--header-height); }

.brand{ display: flex; align-items: center; gap: 12px; color: var(--color-text-light); }
.brand__mark{ color: var(--color-orange); display: flex; flex-shrink: 0; }
.brand__text{ display: flex; flex-direction: column; line-height: 1.2; }
.brand__name{ font-family: var(--font-display); font-weight: 700; font-size: 1.05rem; }
.brand__name--footer{ color: var(--color-text-light); font-size: 1.2rem; }
.brand__tagline{ font-size: 0.72rem; color: #9AA5B1; font-family: var(--font-mono); }

.site-nav{ margin-left: var(--space-2); flex: 1; }
.site-nav ul{ display: flex; gap: var(--space-3); }
.site-nav a{
  font-weight: 500;
  font-size: 0.94rem;
  color: #C6CDD5;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.site-nav a:hover, .site-nav a.is-active{ color: #fff; border-color: var(--color-orange); }

.header-contact{ display: flex; align-items: center; gap: var(--space-2); margin-left: auto; }
.header-contact__phone{
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1rem;
  color: #fff;
  padding: 8px 14px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  transition: border-color 0.15s ease;
}
.header-contact__phone:hover{ border-color: var(--color-orange); }
.header-contact__phone svg{ color: var(--color-orange); flex-shrink: 0; }

.nav-toggle{
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px; height: 40px;
  background: transparent; border: 1px solid var(--color-line); border-radius: var(--radius-sm);
  margin-left: auto;
}
.nav-toggle span{ display: block; height: 2px; width: 20px; background: #fff; margin: 0 auto; }

/* ==========================================================================
   HERO
   ========================================================================== */
.hero{ background: var(--color-paper); padding: var(--space-6) var(--space-3) var(--space-5); }
.hero__inner{
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: var(--space-5);
  align-items: center;
}
.eyebrow{
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  color: var(--color-orange-dark);
  text-transform: uppercase;
  margin-bottom: var(--space-2);
  display: block;
}
.eyebrow--center{ text-align: center; }
.hero__title{ font-size: clamp(2rem, 4vw, 2.9rem); color: var(--color-ink); }
.hero__subtitle{ font-size: 1.15rem; color: var(--color-text-muted); max-width: 46ch; }
.hero__actions{ display: flex; gap: var(--space-2); flex-wrap: wrap; margin: var(--space-3) 0; }
.hero__trust{ font-family: var(--font-mono); font-size: 0.82rem; color: var(--color-text-muted); }

.hero__diagram{
  background: var(--color-ink);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-line);
  aspect-ratio: 1 / 1;
  overflow: hidden;
}

.diagram-broken{ opacity: 1; }
.diagram-repaired{
  stroke-dasharray: 900;
  stroke-dashoffset: 900;
  animation: draw-repair 2.2s ease forwards 0.4s;
}
.diagram-broken{ animation: fade-broken 0.6s ease forwards 2.4s; }
.diagram-dims, .diagram-scan{ opacity: 0; animation: fade-in 0.8s ease forwards 1.6s; }

@keyframes draw-repair{ to{ stroke-dashoffset: 0; } }
@keyframes fade-broken{ to{ opacity: 0.12; } }
@keyframes fade-in{ to{ opacity: 1; } }

@media (prefers-reduced-motion: reduce){
  .diagram-repaired{ stroke-dashoffset: 0; animation: none; }
  .diagram-broken{ opacity: 0.12; animation: none; }
  .diagram-dims, .diagram-scan{ opacity: 1; animation: none; }
}

/* ==========================================================================
   BANDES PLEINE LARGEUR
   ========================================================================== */
.band{ padding: var(--space-5) var(--space-3); }
.band--anthracite{ background: var(--color-anthracite); color: var(--color-text-light); }
.band__inner{ max-width: 840px; margin: 0 auto; text-align: center; }
.band__label{ font-family: var(--font-mono); color: var(--color-yellow); text-transform: uppercase; font-size: 0.82rem; letter-spacing: 0.03em; margin-bottom: var(--space-2); }
.band__lead{ font-size: 1.2rem; color: #DADDE0; margin-bottom: var(--space-2); }

/* ==========================================================================
   SECTIONS GÉNÉRIQUES
   ========================================================================== */
.section{ padding: var(--space-5) var(--space-3); }
.section--muted{ background: var(--color-paper-2); }
.section__inner{ max-width: var(--max-width); margin: 0 auto; }
.section__inner--narrow{ max-width: 720px; }
.section__title{ font-size: clamp(1.6rem, 3vw, 2.1rem); color: var(--color-ink); margin-bottom: var(--space-4); }
.section__title--center{ text-align: center; }
.section__note{ text-align: center; color: var(--color-text-muted); max-width: 60ch; margin: -1.5rem auto var(--space-4); }

.page-hero{ background: var(--color-ink); color: var(--color-text-light); padding: var(--space-5) var(--space-3); }
.page-hero__inner{ max-width: var(--max-width); margin: 0 auto; }
.page-hero h1{ font-size: clamp(1.8rem, 4vw, 2.5rem); }
.page-hero__lead{ color: #B9C1C9; font-size: 1.1rem; max-width: 60ch; }

/* ==========================================================================
   CARTES — "Pourquoi moi"
   ========================================================================== */
.feature-grid{ display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3); }
.feature-card{
  background: #fff;
  border: 1px solid var(--color-line-light);
  border-radius: var(--radius-md);
  padding: var(--space-3);
}
.feature-card__icon{
  display: inline-flex; align-items: center; justify-content: center;
  width: 52px; height: 52px;
  background: var(--color-paper-2);
  color: var(--color-orange-dark);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-2);
}
.feature-card h3{ font-size: 1.1rem; color: var(--color-ink); }
.feature-card p{ color: var(--color-text-muted); margin: 0; }

/* ==========================================================================
   PILIERS (services.html)
   ========================================================================== */
.pillar-grid{ display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3); }
.pillar-card{
  padding: var(--space-4) var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-ink);
  color: var(--color-text-light);
  border-top: 3px solid var(--color-orange);
}
.pillar-card h3{ font-size: 1.2rem; }
.pillar-card p{ color: #B9C1C9; margin: 0; }

.expertise-grid{ display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3); }
.expertise-item__tag{ font-family: var(--font-mono); font-size: 0.8rem; color: var(--color-orange-dark); display: block; margin-bottom: var(--space-1); }
.expertise-item h3{ font-size: 1.1rem; color: var(--color-ink); }
.expertise-item p{ color: var(--color-text-muted); margin: 0; }

/* ==========================================================================
   GRILLE TARIFAIRE — "fiche technique"
   ========================================================================== */
.pricing-grid{ display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-3); align-items: stretch; }
.price-card{
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  background: #fff;
  border: 1px solid var(--color-line-light);
  border-radius: var(--radius-md);
  padding: var(--space-3);
}
.price-card--featured{
  border-color: var(--color-orange);
  box-shadow: 0 8px 24px rgba(255, 106, 26, 0.14);
}
.price-card__badge{
  position: absolute; top: -12px; left: var(--space-3);
  background: var(--color-orange); color: #fff;
  font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase;
  padding: 4px 10px; border-radius: 999px;
}
.price-card__name{ font-size: 1.05rem; color: var(--color-ink); }
.price-card__desc{ color: var(--color-text-muted); font-size: 0.92rem; flex: 1; }
.price-card__ideal{ font-size: 0.85rem; color: var(--color-text-muted); border-top: 1px dashed var(--color-line-light); padding-top: var(--space-1); }
.price-card__ideal span{ font-family: var(--font-mono); color: var(--color-ink); display: block; text-transform: uppercase; font-size: 0.72rem; margin-bottom: 2px; }
.price-card__price{ font-family: var(--font-mono); font-weight: 600; font-size: 1.05rem; color: var(--color-ink); }

/* ==========================================================================
   MATÉRIAUX
   ========================================================================== */
.material-category{ margin-bottom: var(--space-4); }
.material-category__title{
  font-size: 1.3rem; color: var(--color-ink);
  border-bottom: 2px solid var(--color-orange);
  display: inline-block; padding-bottom: 4px; margin-bottom: var(--space-3);
}
.material-grid{ display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-2); }
.material-swatch{
  background: #fff;
  border: 1px solid var(--color-line-light);
  border-left: 4px solid var(--color-blueprint);
  border-radius: var(--radius-sm);
  padding: var(--space-2);
}
.material-swatch__name{ display: block; font-family: var(--font-mono); font-weight: 600; color: var(--color-ink); margin-bottom: 4px; }
.material-swatch__note{ color: var(--color-text-muted); font-size: 0.9rem; }

/* ==========================================================================
   CTA BAND (footer)
   ========================================================================== */
.site-footer{ background: var(--color-ink); color: var(--color-text-light); }
.cta-band{ background: var(--color-anthracite); padding: var(--space-5) var(--space-3); border-bottom: 1px solid var(--color-line); }
.cta-band__inner{ max-width: 780px; margin: 0 auto; text-align: center; }
.cta-band__eyebrow{ font-family: var(--font-mono); color: var(--color-yellow); text-transform: uppercase; font-size: 0.85rem; margin-bottom: var(--space-2); }
.cta-band__title{ font-size: clamp(1.4rem, 3vw, 1.9rem); margin-bottom: var(--space-3); }
.cta-band__title a{ color: var(--color-orange); border-bottom: 2px solid transparent; }
.cta-band__title a:hover{ border-color: var(--color-orange); }
.cta-band__break{ display: none; }

.site-footer__inner{
  max-width: var(--max-width); margin: 0 auto;
  padding: var(--space-4) var(--space-3);
  display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: var(--space-4);
}
.footer-col p{ color: #9AA5B1; margin: 0 0 4px; }
.footer-col__meta{ font-family: var(--font-mono); font-size: 0.85rem; }
.footer-col__label{ font-family: var(--font-mono); text-transform: uppercase; font-size: 0.78rem; color: var(--color-yellow); display: block; margin-bottom: var(--space-2); }
.footer-links li{ margin-bottom: 8px; }
.footer-links a{ color: #C6CDD5; }
.footer-links a:hover{ color: #fff; }
.site-footer__bottom{ border-top: 1px solid var(--color-line); padding: var(--space-2) var(--space-3); text-align: center; font-size: 0.85rem; color: #6E7A87; }

/* ==========================================================================
   FORMULAIRE DE CONTACT
   ========================================================================== */
.contact-direct{ display: flex; gap: var(--space-3); margin-top: var(--space-3); flex-wrap: wrap; }
.contact-direct__phone, .contact-direct__email{
  font-family: var(--font-mono); font-weight: 600; font-size: 1.15rem;
  color: var(--color-orange); border-bottom: 2px solid var(--color-orange);
  padding-bottom: 2px;
}

.form-alerts{ margin-bottom: var(--space-3); }
.form-alert{ padding: 12px 16px; border-radius: var(--radius-sm); font-size: 0.92rem; margin-bottom: 8px; }
.form-alert--error{ background: #FBE4E1; color: #8a3b34; border: 1px solid #E5A69E; }
.form-alert--success{ background: #E4F3E9; color: #1F5C3B; border: 1px solid #A6D9BB; }

.contact-form{ display: flex; flex-direction: column; gap: var(--space-3); }
.form-row{ display: flex; flex-direction: column; gap: 6px; }
.form-row--split{ display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); }
.form-row label{ font-weight: 600; font-size: 0.92rem; color: var(--color-ink); }
.optional{ font-weight: 400; color: var(--color-text-muted); font-size: 0.85rem; }
.form-row input, .form-row textarea{
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--color-line-light);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--color-text-dark);
}
.form-row input:focus, .form-row textarea:focus{ border-color: var(--color-orange); }
.contact-form .btn{ align-self: flex-start; }

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 960px){
  .hero__inner{ grid-template-columns: 1fr; }
  .hero__diagram{ order: -1; max-width: 420px; margin: 0 auto; }
  .pricing-grid{ grid-template-columns: repeat(2, 1fr); }
  .feature-grid, .pillar-grid, .expertise-grid{ grid-template-columns: repeat(2, 1fr); }
  .material-grid{ grid-template-columns: repeat(2, 1fr); }
  .site-footer__inner{ grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px){
  :root{ --header-height: 68px; }
  .nav-toggle{ display: flex; }
  .site-nav{
    position: fixed; top: var(--header-height); left: 0; right: 0;
    background: var(--color-ink);
    border-bottom: 1px solid var(--color-line);
    max-height: 0; overflow: hidden;
    transition: max-height 0.25s ease;
  }
  .site-nav.is-open{ max-height: 320px; }
  .site-nav ul{ flex-direction: column; padding: var(--space-2) var(--space-3); gap: 4px; }
  .site-nav a{ display: block; padding: 10px 0; border-bottom: 1px solid var(--color-line); }
  .header-contact__phone span{ display: none; }
  .brand__tagline{ display: none; }

  .feature-grid, .pillar-grid, .expertise-grid, .pricing-grid, .material-grid{ grid-template-columns: 1fr; }
  .site-footer__inner{ grid-template-columns: 1fr; }
  .form-row--split{ grid-template-columns: 1fr; }
  .cta-band__break{ display: block; }
}