/* ============================================
   MSGF - Site Vitrine
   Style dark & moderne — mobile-first
   ============================================ */

/* ---- Variables ---- */
:root {
  --bg-primary:    #0d1117;
  --bg-secondary:  #161b22;
  --bg-card:       #1f2937;
  --bg-card-hover: #263347;
  --accent:        #f97316;
  --accent-hover:  #ea580c;
  --accent-light:  rgba(249, 115, 22, 0.12);
  --text-primary:  #f9fafb;
  --text-muted:    #9ca3af;
  --text-dimmed:   #6b7280;
  --border:        #30363d;
  --border-light:  rgba(48, 54, 61, 0.6);
  --font:          'Inter', system-ui, sans-serif;
  --radius:        12px;
  --radius-sm:     8px;
  --shadow:        0 4px 24px rgba(0,0,0,0.4);
  --shadow-lg:     0 8px 40px rgba(0,0,0,0.6);
  --nav-h:         68px;
  --transition:    0.25s ease;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }
input, select, textarea { font: inherit; }

/* ---- Utility ---- */
.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 20px;
}
.accent { color: var(--accent); }
.section {
  padding: 80px 0;
}
.section--dark {
  background: var(--bg-secondary);
}
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}
.section-header h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 16px;
}
.section-header p {
  color: var(--text-muted);
  font-size: 1.05rem;
}
.section-tag {
  display: inline-block;
  background: var(--accent-light);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 4px 14px;
  border-radius: 999px;
  border: 1px solid rgba(249,115,22,0.3);
  margin-bottom: 16px;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover, .btn-primary:focus-visible {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(249,115,22,0.4);
}
.btn-outline {
  border: 2px solid rgba(255,255,255,0.35);
  color: var(--text-primary);
}
.btn-outline:hover, .btn-outline:focus-visible {
  border-color: rgba(255,255,255,0.7);
  background: rgba(255,255,255,0.06);
}
.btn-full { width: 100%; justify-content: center; }

/* ---- Animations ---- */
.animate-fade, .animate-up {
  opacity: 0;
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.animate-up { transform: translateY(28px); }
.animate-fade.visible, .animate-up.visible {
  opacity: 1;
  transform: none;
}
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

/* ======================================
   NAVBAR
   ====================================== */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-h);
  transition: background var(--transition), box-shadow var(--transition);
}
#navbar.scrolled {
  background: rgba(13, 17, 23, 0.97);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.nav-logo img {
  height: 42px;
  width: auto;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-links a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition), background var(--transition);
}
.nav-links a:hover, .nav-links a:focus-visible {
  color: var(--text-primary);
  background: rgba(255,255,255,0.06);
}
.nav-cta {
  background: var(--accent) !important;
  color: #fff !important;
  padding: 9px 20px !important;
  font-weight: 600 !important;
}
.nav-cta:hover, .nav-cta:focus-visible {
  background: var(--accent-hover) !important;
}
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}
.hamburger:hover { background: rgba(255,255,255,0.08); }
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ======================================
   HERO
   ====================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: url('../images/engine-3483527_960_720.jpg') center/cover no-repeat;
  padding-top: var(--nav-h);
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(13,17,23,0.92) 0%, rgba(13,17,23,0.75) 60%, rgba(13,17,23,0.5) 100%);
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 680px;
  padding: 80px 20px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent-light);
  border: 1px solid rgba(249,115,22,0.35);
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 24px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.hero h1 {
  font-size: clamp(2.2rem, 6vw, 3.8rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}
.hero-sub {
  font-size: clamp(1rem, 2.5vw, 1.15rem);
  color: rgba(249,250,251,0.8);
  margin-bottom: 40px;
  max-width: 540px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.hero-eflex-badge {
  position: absolute;
  right: 40px;
  bottom: 48px;
  background: rgba(30,40,55,0.9);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  text-align: center;
  backdrop-filter: blur(8px);
  z-index: 1;
}
.hero-eflex-badge span {
  display: block;
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.hero-eflex-badge strong {
  font-size: 1rem;
  color: var(--accent);
  font-weight: 700;
}

/* ======================================
   STATS BAND
   ====================================== */
.stats-band {
  background: var(--bg-secondary);
  padding: 48px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px 24px;
}
.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 8px;
}
.stat-item i {
  font-size: 1.8rem;
  margin-bottom: 4px;
}
.stat-item strong {
  font-size: 1.05rem;
  font-weight: 700;
}
.stat-item span {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ======================================
   SERVICES
   ====================================== */
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  position: relative;
}
.service-card:hover {
  border-color: var(--border-light);
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}
.service-card--featured {
  border-color: var(--accent);
  background: linear-gradient(135deg, var(--bg-card) 70%, rgba(249,115,22,0.06) 100%);
}
.service-card--featured:hover {
  border-color: var(--accent-hover);
  box-shadow: 0 8px 32px rgba(249,115,22,0.2);
}
.service-card-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--accent);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.service-icon {
  width: 52px;
  height: 52px;
  background: var(--accent-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.service-icon i {
  font-size: 1.4rem;
  color: var(--accent);
}
.service-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.service-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 20px;
}
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent);
  font-size: 0.88rem;
  font-weight: 600;
  transition: gap var(--transition);
}
.card-link:hover { gap: 10px; }

/* ======================================
   E85 SECTION
   ====================================== */
.e85-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 56px;
  align-items: start;
}
.e85-content h2 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 20px;
}
.e85-intro {
  color: var(--text-muted);
  margin-bottom: 28px;
  font-size: 0.97rem;
  line-height: 1.7;
}
.e85-benefits {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 36px;
}
.e85-benefits li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.92rem;
}
.e85-benefits li i {
  color: var(--accent);
  margin-top: 3px;
  flex-shrink: 0;
}

/* Price compare */
.price-compare {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 32px;
}
.price-compare h3 {
  font-size: 0.88rem;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.price-table { display: flex; flex-direction: column; gap: 14px; }
.price-row {
  display: grid;
  grid-template-columns: 70px 1fr 100px;
  align-items: center;
  gap: 12px;
}
.fuel-label { font-size: 0.85rem; font-weight: 600; }
.fuel-bar {
  height: 10px;
  background: var(--bg-secondary);
  border-radius: 999px;
  overflow: hidden;
}
.fuel-bar-fill {
  height: 100%;
  border-radius: 999px;
  transition: width 1.2s ease;
}
.fuel-bar-fill--sp95 { background: var(--text-dimmed); }
.fuel-bar-fill--e85  { background: var(--accent); }
.fuel-price { font-size: 0.88rem; font-weight: 600; text-align: right; }
.fuel-price small { font-weight: 400; color: var(--accent); }
.price-note {
  font-size: 0.75rem;
  color: var(--text-dimmed);
  margin-top: 14px;
}

/* FAQ */
.faq { margin-bottom: 36px; }
.faq h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 14px;
}
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  overflow: hidden;
}
.faq-item summary {
  padding: 14px 18px;
  cursor: pointer;
  font-size: 0.92rem;
  font-weight: 600;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background var(--transition);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  color: var(--accent);
  font-size: 1.2rem;
  font-weight: 400;
  transition: transform var(--transition);
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item summary:hover { background: rgba(255,255,255,0.04); }
.faq-item p {
  padding: 4px 18px 16px;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* E85 actions */
.e85-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
}
.eflex-link {
  display: flex;
  flex-direction: column;
}
.eflex-logo-box {
  font-weight: 700;
  color: var(--accent);
  font-size: 0.92rem;
}
.eflex-link small {
  font-size: 0.75rem;
  color: var(--text-dimmed);
}

/* E85 image */
.e85-image {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
}
.e85-image img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  border-radius: var(--radius);
  filter: brightness(0.85);
}
.e85-image-badge {
  position: absolute;
  bottom: 20px;
  left: 20px;
  background: rgba(249,115,22,0.92);
  color: #fff;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ======================================
   À PROPOS
   ====================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: border-color var(--transition);
}
.about-card:hover { border-color: rgba(249,115,22,0.4); }
.about-icon {
  width: 52px;
  height: 52px;
  background: var(--accent-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.about-icon i { font-size: 1.3rem; color: var(--accent); }
.about-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.about-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.65;
}

/* ======================================
   CONTACT
   ====================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 56px;
}
.contact-info h2 {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 700;
  margin: 12px 0 18px;
}
.contact-info > p {
  color: var(--text-muted);
  margin-bottom: 32px;
  font-size: 0.95rem;
}
.contact-details {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 28px;
}
.contact-details li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}
.contact-details li i {
  color: var(--accent);
  font-size: 1rem;
  margin-top: 3px;
  width: 18px;
  text-align: center;
  flex-shrink: 0;
}
.contact-details li div {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.contact-details strong {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.contact-details a, .contact-details span {
  font-size: 0.95rem;
  color: var(--text-primary);
}
.contact-details a:hover { color: var(--accent); }
.contact-eflex {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--accent-light);
  border: 1px solid rgba(249,115,22,0.3);
  color: var(--accent);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
}

/* Form */
.contact-form-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 18px;
}
.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}
.form-group label span { color: var(--accent); }
.form-group input,
.form-group select,
.form-group textarea {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  color: var(--text-primary);
  font-size: 0.92rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
.form-group select { appearance: none; cursor: pointer; }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(249,115,22,0.15);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-dimmed); }
.form-group textarea { resize: vertical; min-height: 120px; }
.honeypot { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-feedback {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  display: none;
}
.form-feedback.success {
  display: block;
  background: rgba(34,197,94,0.12);
  border: 1px solid rgba(34,197,94,0.3);
  color: #86efac;
}
.form-feedback.error {
  display: block;
  background: rgba(239,68,68,0.12);
  border: 1px solid rgba(239,68,68,0.3);
  color: #fca5a5;
}
#submit-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

/* ======================================
   FOOTER
   ====================================== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 56px 0 0;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-brand img { margin-bottom: 12px; }
.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.footer-nav strong,
.footer-contact strong {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 14px;
}
.footer-nav ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-nav a {
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: color var(--transition);
}
.footer-nav a:hover { color: var(--accent); }
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-contact a {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: color var(--transition);
}
.footer-contact a:hover { color: var(--accent); }
.footer-contact i { width: 14px; text-align: center; color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 18px 0;
}
.footer-bottom p {
  font-size: 0.8rem;
  color: var(--text-dimmed);
  text-align: center;
}

/* ======================================
   RESPONSIVE — Tablet (≥ 640px)
   ====================================== */
@media (min-width: 640px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .form-row {
    grid-template-columns: 1fr 1fr;
  }
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .about-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .footer-inner {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ======================================
   RESPONSIVE — Desktop (≥ 1024px)
   ====================================== */
@media (min-width: 1024px) {
  .hamburger { display: none; }
  .nav-links {
    display: flex !important; /* override mobile hidden state */
    position: static;
    flex-direction: row;
    background: none;
    padding: 0;
    box-shadow: none;
    border: none;
  }
  .e85-grid {
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
  }
  .contact-grid {
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start;
  }
}

/* ======================================
   RESPONSIVE — Mobile nav
   ====================================== */
@media (max-width: 1023px) {
  .hamburger { display: flex; }
  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(13,17,23,0.98);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 32px 24px;
    backdrop-filter: blur(12px);
  }
  .nav-links.open { display: flex; }
  .nav-links a {
    font-size: 1.1rem;
    padding: 14px 28px;
    width: 100%;
    text-align: center;
    color: var(--text-primary);
  }
  .nav-cta { margin-top: 8px; }
  .hero-eflex-badge {
    right: 16px;
    bottom: 24px;
  }
}

/* ======================================
   FOCUS visible (accessibilité)
   ====================================== */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}