/* =============================================
   ALBA BIE — Stylesheet
   ============================================= */

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

:root {
  --clr-dark:    #0f1923;
  --clr-darker:  #080f17;
  --clr-mid:     #1a2a3a;
  --clr-accent:  #e8871a;
  --clr-accent2: #f5a94e;
  --clr-light:   #f4f6f9;
  --clr-text:    #2d3748;
  --clr-muted:   #718096;
  --clr-white:   #ffffff;
  --radius:      12px;
  --shadow:      0 4px 24px rgba(0,0,0,.10);
  --shadow-lg:   0 12px 40px rgba(0,0,0,.18);
  --transition:  .3s ease;
  --font-head:   'Barlow Condensed', sans-serif;
  --font-body:   'Inter', sans-serif;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  color: var(--clr-text);
  background: var(--clr-white);
  line-height: 1.65;
  overflow-x: hidden;
}

/* ── Containers ── */
.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }

/* ── Typography ── */
h1, h2, h3, h4, h5 { font-family: var(--font-head); line-height: 1.15; }
h1 { font-size: clamp(2.8rem, 6vw, 5rem); font-weight: 800; color: var(--clr-white); }
h2 { font-size: clamp(2rem, 4vw, 3rem); font-weight: 700; color: var(--clr-dark); }
h3 { font-size: 1.5rem; font-weight: 700; color: var(--clr-dark); margin-bottom: .5rem; }
h4 { font-size: 1.1rem; font-weight: 600; color: var(--clr-dark); margin-bottom: .3rem; }

p { margin-bottom: 1rem; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }

.section-tag {
  display: inline-block;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--clr-accent);
  margin-bottom: 12px;
}

.section-header { text-align: center; margin-bottom: 64px; }
.section-header h2 { margin-top: 8px; }
.section-header.light h2 { color: var(--clr-white); }
.section-header.light .section-tag { color: var(--clr-accent2); }

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px;
  border-radius: 6px;
  font-family: var(--font-body);
  font-size: .95rem; font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  text-align: center;
}
.btn-primary {
  background: var(--clr-accent);
  color: var(--clr-white);
  border-color: var(--clr-accent);
}
.btn-primary:hover {
  background: var(--clr-accent2);
  border-color: var(--clr-accent2);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(232,135,26,.35);
}
.btn-outline {
  background: transparent;
  color: var(--clr-white);
  border-color: rgba(255,255,255,.5);
}
.btn-outline:hover {
  background: rgba(255,255,255,.12);
  border-color: var(--clr-white);
}
.btn-full { width: 100%; justify-content: center; }

/* ── Scroll animations ── */
.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .6s ease, transform .6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* =============================================
   HEADER / NAV
   ============================================= */
#header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition);
}
#header.scrolled {
  background: var(--clr-darker);
  box-shadow: 0 2px 20px rgba(0,0,0,.4);
}

.nav-container {
  max-width: 1180px; margin: 0 auto;
  padding: 18px 24px;
  display: flex; align-items: center; justify-content: space-between;
}

.logo { display: flex; align-items: center; }
.logo-img {
  height: 52px;
  width: auto;
  filter: drop-shadow(0 1px 4px rgba(0,0,0,.5));
  transition: opacity var(--transition);
}
.logo-img:hover { opacity: .85; }

.nav-links {
  list-style: none;
  display: flex; align-items: center; gap: 8px;
}
.nav-links a {
  color: rgba(255,255,255,.85);
  font-size: .9rem; font-weight: 500;
  padding: 8px 14px;
  border-radius: 6px;
  transition: all var(--transition);
}
.nav-links a:hover { color: var(--clr-white); background: rgba(255,255,255,.08); }
.nav-links a.active { color: var(--clr-accent); }
.nav-cta {
  background: var(--clr-accent) !important;
  color: var(--clr-white) !important;
  font-weight: 600 !important;
}
.nav-cta:hover {
  background: var(--clr-accent2) !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(232,135,26,.4);
}

.burger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 8px;
  position: relative; z-index: 1000;
}
.burger span {
  display: block; width: 24px; height: 2px;
  background: var(--clr-white);
  border-radius: 2px;
  transition: all var(--transition);
}

/* =============================================
   HERO
   ============================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center;
  background:
    linear-gradient(135deg, rgba(8,15,23,.85) 0%, rgba(26,42,58,.65) 100%),
    url('images/bardage2.png') center/cover no-repeat;
  overflow: hidden;
}

.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to bottom, transparent 60%, var(--clr-darker) 100%);
}

.hero-content {
  position: relative; z-index: 1;
  width: 100%;
  max-width: 780px;
  padding: 140px clamp(24px, 6vw, 100px) 80px;
}
.hero-tag {
  font-size: .82rem; font-weight: 600;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--clr-accent);
  margin-bottom: 20px;
}
.hero h1 { margin-bottom: 24px; }
.hero-desc {
  font-size: 1.1rem; color: rgba(255,255,255,.8);
  max-width: 520px; margin-bottom: 36px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-scroll {
  position: absolute; bottom: 36px; left: 50%; transform: translateX(-50%);
}
.hero-scroll span {
  display: block; width: 2px; height: 60px;
  background: linear-gradient(to bottom, var(--clr-accent), transparent);
  margin: 0 auto;
  animation: scrollLine 2s ease-in-out infinite;
}
@keyframes scrollLine {
  0%, 100% { opacity: 1; transform: scaleY(1); }
  50% { opacity: .4; transform: scaleY(.6); }
}

/* =============================================
   STATS BAR
   ============================================= */
.stats-bar {
  background: var(--clr-accent);
  padding: 40px 24px;
}
.stats-grid {
  max-width: 1180px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 24px; text-align: center;
}
.stat-number {
  display: block;
  font-family: var(--font-head);
  font-size: 2.6rem; font-weight: 800;
  color: var(--clr-white);
  line-height: 1;
  margin-bottom: 6px;
}
.stat-label {
  font-size: .82rem; font-weight: 600;
  color: rgba(255,255,255,.85);
  text-transform: uppercase; letter-spacing: .06em;
}

/* =============================================
   ABOUT
   ============================================= */
.about { background: var(--clr-light); }
.about-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 80px; align-items: center;
}
.about-text h2 { margin-bottom: 20px; margin-top: 8px; }
.about-text p { color: var(--clr-muted); }
.about-text strong { color: var(--clr-dark); }

.about-badges { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--clr-white);
  border: 1px solid #e2e8f0;
  padding: 10px 16px; border-radius: 50px;
  font-size: .82rem; font-weight: 600; color: var(--clr-dark);
  box-shadow: var(--shadow);
}
.badge i { color: var(--clr-accent); }

.about-visual {
  display: grid; grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 20px;
}
.visual-card {
  background: var(--clr-white);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}
.visual-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.visual-card i {
  font-size: 2rem; color: var(--clr-accent);
  margin-bottom: 12px; display: block;
}
.visual-card p { margin: 0; font-size: .9rem; font-weight: 600; color: var(--clr-dark); }
.vc1 { grid-column: 1; grid-row: 1; }
.vc2 { grid-column: 2; grid-row: 1; }
.vc3 { grid-column: 1 / -1; }

/* =============================================
   SERVICES
   ============================================= */
.services { background: var(--clr-white); }
.services-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.service-card {
  background: var(--clr-light);
  border-radius: var(--radius);
  padding: 40px 32px;
  border: 2px solid transparent;
  transition: all var(--transition);
  position: relative; overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: transparent;
  transition: background var(--transition);
}
.service-card:hover { border-color: var(--clr-accent); box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.service-card:hover::before { background: var(--clr-accent); }
.service-card.featured { background: var(--clr-dark); border-color: var(--clr-accent); }
.service-card.featured::before { background: var(--clr-accent); }
.service-card.featured h3 { color: var(--clr-white); }
.service-card.featured p { color: rgba(255,255,255,.7); }
.service-card.featured strong { color: var(--clr-accent2); }
.service-card.featured .service-list li { color: rgba(255,255,255,.8); border-bottom-color: rgba(255,255,255,.06); }
.service-card.featured .service-list i { color: var(--clr-accent); }

.service-icon {
  width: 60px; height: 60px;
  background: linear-gradient(135deg, var(--clr-accent), var(--clr-accent2));
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
}
.service-icon i { font-size: 1.4rem; color: var(--clr-white); }
.service-card p { color: var(--clr-muted); font-size: .93rem; margin-bottom: 20px; }

.service-list { list-style: none; }
.service-list li {
  display: flex; align-items: center; gap: 10px;
  font-size: .88rem; font-weight: 500; color: var(--clr-text);
  padding: 6px 0;
  border-bottom: 1px solid rgba(0,0,0,.05);
}
.service-list li:last-child { border-bottom: none; }
.service-list i { color: var(--clr-accent); font-size: .8rem; flex-shrink: 0; }

/* =============================================
   RÉFÉRENCES
   ============================================= */
.references { background: var(--clr-dark); }
.refs-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.ref-card {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius);
  padding: 28px;
  display: flex; gap: 20px; align-items: flex-start;
  transition: all var(--transition);
}
.ref-card:hover {
  background: rgba(255,255,255,.08);
  border-color: var(--clr-accent);
  transform: translateY(-3px);
}
.ref-icon {
  width: 48px; height: 48px; flex-shrink: 0;
  background: linear-gradient(135deg, var(--clr-accent), var(--clr-accent2));
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
}
.ref-icon i { font-size: 1.1rem; color: var(--clr-white); }
.ref-info h4 { color: var(--clr-white); margin-bottom: 4px; }
.ref-client { font-size: .85rem; color: rgba(255,255,255,.5); margin-bottom: 4px; }
.ref-detail { font-size: .85rem; color: rgba(255,255,255,.65); margin-bottom: 10px; }
.ref-tag {
  display: inline-block;
  font-size: .72rem; font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase;
  color: var(--clr-accent);
  background: rgba(232,135,26,.12);
  border: 1px solid rgba(232,135,26,.25);
  padding: 3px 10px; border-radius: 50px;
}

/* =============================================
   CONTACT
   ============================================= */
.contact { background: var(--clr-light); }
.contact-grid {
  display: grid; grid-template-columns: 1fr 1.4fr;
  gap: 64px; align-items: start;
}

.contact-info { display: flex; flex-direction: column; gap: 28px; }
.contact-item { display: flex; gap: 18px; align-items: flex-start; }
.contact-icon {
  width: 44px; height: 44px; flex-shrink: 0;
  background: var(--clr-accent);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
}
.contact-icon i { color: var(--clr-white); font-size: 1rem; }
.contact-item h4 { margin-bottom: 4px; color: var(--clr-dark); }
.contact-item p, .contact-item a {
  font-size: .93rem; color: var(--clr-muted);
}
.contact-item a:hover { color: var(--clr-accent); }

.contact-form {
  background: var(--clr-white);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow-lg);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block; font-size: .83rem; font-weight: 600;
  color: var(--clr-dark); margin-bottom: 6px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: var(--clr-light);
  border: 2px solid #e2e8f0;
  border-radius: 8px;
  padding: 12px 14px;
  font-family: var(--font-body); font-size: .9rem;
  color: var(--clr-text);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  appearance: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--clr-accent);
  box-shadow: 0 0 0 3px rgba(232,135,26,.15);
  background: var(--clr-white);
}
.form-group textarea { resize: vertical; min-height: 130px; }
.form-note { font-size: .78rem; color: var(--clr-muted); text-align: center; margin-top: 12px; margin-bottom: 0; }

/* =============================================
   FOOTER
   ============================================= */
.footer { background: var(--clr-darker); padding: 64px 0 32px; }
.footer-grid {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
  gap: 48px; margin-bottom: 48px;
}
.footer-brand .logo-main { font-family: var(--font-head); font-size: 1.6rem; font-weight: 800; color: var(--clr-white); }
.footer-brand p { font-size: .85rem; color: rgba(255,255,255,.45); margin-top: 10px; }

.footer-links h5, .footer-contact h5 {
  font-family: var(--font-head); font-size: 1rem; font-weight: 700;
  color: var(--clr-white); margin-bottom: 16px; letter-spacing: .04em;
}
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { font-size: .88rem; color: rgba(255,255,255,.45); transition: color var(--transition); }
.footer-links a:hover { color: var(--clr-accent); }

.footer-contact a, .footer-contact p {
  display: flex; align-items: center; gap: 10px;
  font-size: .88rem; color: rgba(255,255,255,.45);
  margin-bottom: 12px;
}
.footer-contact a:hover { color: var(--clr-accent); }
.footer-contact i { color: var(--clr-accent); width: 14px; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.07);
  padding-top: 28px;
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px;
}
.footer-bottom p { font-size: .8rem; color: rgba(255,255,255,.3); margin: 0; }

/* =============================================
   BACK TO TOP
   ============================================= */
.back-to-top {
  position: fixed; bottom: 28px; right: 28px; z-index: 900;
  width: 46px; height: 46px;
  background: var(--clr-accent);
  color: var(--clr-white);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  box-shadow: 0 4px 16px rgba(232,135,26,.45);
  opacity: 0; pointer-events: none;
  transform: translateY(12px);
  transition: all var(--transition);
}
.back-to-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-to-top:hover { background: var(--clr-accent2); transform: translateY(-3px); }

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 1024px) {
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .about-visual { grid-template-columns: repeat(3, 1fr); }
  .vc3 { grid-column: auto; }
  .refs-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }

  .nav-links {
    display: none; flex-direction: column;
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: var(--clr-darker);
    justify-content: center; align-items: center;
    gap: 12px; z-index: 999;
  }
  .nav-links.open { display: flex; }
  .nav-links a { font-size: 1.2rem; padding: 12px 32px; }
  .burger { display: flex; }

  .stats-grid { grid-template-columns: 1fr 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .refs-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .form-row { grid-template-columns: 1fr; }
  .about-visual { grid-template-columns: 1fr 1fr; }
  .vc3 { grid-column: 1 / -1; }
  .hero-actions { flex-direction: column; }
  .contact-form { padding: 28px 20px; }
}

/* =============================================
   GALERIE
   ============================================= */
.gallery { background: var(--clr-white); }

.gallery-tabs {
  display: flex; gap: 10px; justify-content: center;
  margin-bottom: 40px; flex-wrap: wrap;
}
.tab-btn {
  padding: 10px 28px;
  border: 2px solid #e2e8f0;
  border-radius: 50px;
  background: transparent;
  font-family: var(--font-body); font-size: .9rem; font-weight: 600;
  color: var(--clr-muted);
  cursor: pointer;
  transition: all var(--transition);
}
.tab-btn:hover { border-color: var(--clr-accent); color: var(--clr-accent); }
.tab-btn.active {
  background: var(--clr-accent); border-color: var(--clr-accent);
  color: var(--clr-white);
}

.gallery-grid {
  columns: 3;
  column-gap: 16px;
}
.gallery-grid.hidden { display: none; }
.gallery-grid img {
  width: 100%;
  display: block;
  margin-bottom: 16px;
  border-radius: var(--radius);
  object-fit: cover;
  transition: transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
  break-inside: avoid;
}
.gallery-grid img:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-lg);
}

/* Lightbox */
.lightbox {
  display: none;
  position: fixed; inset: 0; z-index: 9999;
  background: rgba(0,0,0,.92);
  align-items: center; justify-content: center;
}
.lightbox.open { display: flex; }
.lightbox img {
  max-width: 90vw; max-height: 90vh;
  border-radius: var(--radius);
  box-shadow: 0 0 60px rgba(0,0,0,.6);
}
.lightbox-close {
  position: absolute; top: 24px; right: 32px;
  color: var(--clr-white); font-size: 2rem;
  background: none; border: none; cursor: pointer;
  line-height: 1; opacity: .7;
  transition: opacity var(--transition);
}
.lightbox-close:hover { opacity: 1; }

@media (max-width: 768px) {
  .gallery-grid { columns: 2; }
}
@media (max-width: 480px) {
  .gallery-grid { columns: 1; }
}

/* =============================================
   RESPONSIVE (suite)
   ============================================= */
@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .stat-number { font-size: 2rem; }
}