/* Styles principaux — ZK GLOBAL SERVICES */
:root {
  --bleu-principal: #007BFF;
  --bleu-secondaire: #0056B3;
  --blanc: #FFFFFF;
  --bleu-clair: #E3F2FD;
  --gris: #F8F9FA;
  --text: #222;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: 'Roboto', 'Open Sans', sans-serif; color: var(--text); background: var(--blanc); }
.container { width: min(1100px, 90%); margin: 0 auto; }
.skip-link { position: absolute; left: -999px; top: -999px; }
.skip-link:focus { left: 8px; top: 8px; background: var(--bleu-clair); padding: 8px; z-index: 10000; }

/* Header */
.site-header { position: sticky; top: 0; background: var(--bleu-principal); color: var(--blanc); z-index: 999; box-shadow: 0 2px 8px rgba(0,0,0,0.1); }
.header-container { display: flex; align-items: center; justify-content: space-between; padding: 8px 0; }
.logo img { height: 40px; }
.main-nav .nav-toggle { display: none; }
.nav-menu { display: flex; gap: 16px; list-style: none; margin: 0; padding: 0; }
.nav-menu a { color: var(--blanc); text-decoration: none; font-weight: 500; }
.nav-menu a:hover { text-decoration: underline; }
.lang-switch button { background: var(--bleu-secondaire); color: var(--blanc); border: none; padding: 6px 10px; border-radius: 4px; cursor: pointer; }
.lang-switch button:hover { background: var(--bleu-principal); }

/* Hero */
.hero { background: var(--gris); padding: 40px 0; }
.hero-container { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 24px; align-items: center; }
.hero-text h1 { font-size: 2rem; margin: 0 0 12px; color: var(--bleu-secondaire); }
.hero-text p { font-size: 1rem; margin: 0 0 20px; }
.btn-primary, .btn-secondary { display: inline-block; padding: 10px 16px; border-radius: 6px; text-decoration: none; font-weight: 600; }
.btn-primary { background: var(--bleu-principal); color: var(--blanc); }
.btn-primary:hover { background: var(--bleu-secondaire); }
.btn-secondary { background: var(--bleu-clair); color: var(--bleu-secondaire); }
.btn-secondary:hover { background: #d4e8fb; }

/* Slider */
.hero-slider { position: relative; height: 200px; overflow: hidden; background: var(--blanc); border: 1px solid var(--bleu-clair); border-radius: 8px; }
.hero-slider .slide { position: absolute; inset: 0; display: grid; place-items: center; text-align: center; padding: 16px; }
.hero-slider .slide:nth-child(1) { animation: slide 18s infinite; }
.hero-slider .slide:nth-child(2) { animation: slide 18s infinite 6s; }
.hero-slider .slide:nth-child(3) { animation: slide 18s infinite 12s; }
@keyframes slide { 0% { opacity: 0; transform: translateY(10px);} 5% { opacity: 1; transform: translateY(0);} 30% { opacity: 1;} 33% { opacity: 0;} 100% { opacity: 0;} }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 24px 0; }
.card { background: var(--blanc); border: 1px solid var(--bleu-clair); border-radius: 8px; padding: 16px; box-shadow: 0 2px 6px rgba(0,0,0,0.06); }
.card .icon { width: 40px; height: 40px; }
.link-card { text-decoration: none; color: var(--bleu-secondaire); font-weight: 600; }
.link-card:hover { color: var(--bleu-principal); }

/* Testimonials */
.testimonials { background: var(--blanc); padding: 40px 0; border-top: 4px solid var(--bleu-clair); }
.testimonial-list { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
blockquote { background: var(--gris); padding: 16px; border-left: 4px solid var(--bleu-principal); }

/* Portfolio */
.filters { display: flex; gap: 8px; margin-bottom: 12px; }
.filter-btn { background: var(--bleu-clair); color: var(--bleu-secondaire); border: 1px solid var(--bleu-secondaire); padding: 6px 10px; border-radius: 4px; cursor: pointer; }
.filter-btn.active { background: var(--bleu-secondaire); color: var(--blanc); }
.portfolio-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.portfolio-item { background: var(--blanc); border: 1px solid var(--bleu-clair); border-radius: 8px; padding: 8px; }
.portfolio-item img { width: 100%; border-radius: 6px; cursor: zoom-in; }
.lightbox { position: fixed; inset: 0; background: rgba(0,0,0,0.7); display: none; align-items: center; justify-content: center; }
.lightbox.open { display: flex; }
.lightbox img { max-width: 80vw; max-height: 80vh; border: 6px solid var(--blanc); border-radius: 8px; }
.lightbox-close { position: absolute; top: 24px; right: 24px; background: var(--blanc); color: var(--bleu-secondaire); border: none; font-size: 24px; width: 40px; height: 40px; border-radius: 50%; cursor: pointer; }

/* Forms */
.contact-form .form-row { margin-bottom: 12px; }
.contact-form label { display: block; font-weight: 600; margin-bottom: 6px; }
.contact-form input, .contact-form select, .contact-form textarea { width: 100%; padding: 10px; border: 1px solid var(--bleu-clair); border-radius: 6px; font-size: 1rem; }
.form-note { font-size: 0.9rem; color: #555; }
.map iframe { width: 100%; height: 320px; border: 0; border-radius: 8px; margin-top: 12px; }

/* Footer */
.site-footer { background: var(--bleu-secondaire); color: var(--blanc); margin-top: 40px; }
.footer-container { padding: 24px 0; }
.footer-columns { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 16px; }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; border-top: 1px solid rgba(255,255,255,0.2); padding-top: 12px; }
.social-link { color: var(--blanc); text-decoration: none; margin-left: 12px; }
.social-link:hover { text-decoration: underline; }

/* Responsive */
@media (max-width: 900px) {
  .hero-container { grid-template-columns: 1fr; }
  .cards { grid-template-columns: 1fr 1fr; }
  .testimonial-list { grid-template-columns: 1fr; }
  .portfolio-grid { grid-template-columns: 1fr 1fr; }
  .footer-columns { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .nav-menu { display: none; position: absolute; right: 0; top: 56px; background: var(--bleu-principal); padding: 12px; flex-direction: column; }
  .main-nav .nav-toggle { display: inline-block; background: transparent; border: 1px solid var(--blanc); color: var(--blanc); padding: 6px 10px; border-radius: 4px; }
  .cards { grid-template-columns: 1fr; }
  .portfolio-grid { grid-template-columns: 1fr; }
}

/* Accessibility focus */
:focus { outline: 3px solid var(--bleu-clair); outline-offset: 2px; }

/* Language visibility */
[data-lang] { display: none; }
html[data-current-lang="fr"] [data-lang="fr"], html[data-current-lang="en"] [data-lang="en"] { display: inline; }