:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-soft: #edf3ff;
  --border: #e3e8f1;
  --text: #0f172a;
  --muted: #64748b;
  --primary: #3159e8;
  --primary-soft: #e8efff;
  --shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
  --footer-height: 54px;
  --topbar-height: 90px;
  --sidebar-width: 335px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--bg);
  overflow: hidden;
}

.topbar {
  height: var(--topbar-height);
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 0 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.menu-toggle {
  width: 48px;
  height: 48px;
  border: 0;
  border-radius: 15px;
  background: var(--primary-soft);
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  cursor: pointer;
}

.menu-toggle span {
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
}

.brand h1 {
  margin: 0;
  font-size: 24px;
  line-height: 1.2;
}

.brand p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 15px;
}

.layout {
  display: flex;
  height: calc(100vh - var(--topbar-height) - var(--footer-height));
}

.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: auto;
}

.main-menu {
  padding: 18px 16px 10px;
}

.menu-section-title {
  margin: 18px 10px 8px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.menu-section-title:first-child {
  margin-top: 2px;
}

.menu-item {
  width: 100%;
  min-height: 46px;
  margin-bottom: 5px;
  padding: 8px 12px;
  border: 0;
  border-radius: 14px;
  background: transparent;
  color: var(--text);
  text-align: left;
  font-size: 15px;
  line-height: 1.25;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
  display: flex;
  align-items: center;
  gap: 11px;
}

.menu-item:hover,
.menu-item.active {
  background: var(--primary-soft);
  color: var(--primary);
}

.menu-item:hover {
  transform: translateX(2px);
}

.menu-icon {
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  border-radius: 13px;
}

.menu-item span {
  min-width: 0;
}

.sidebar-info {
  margin: auto 16px 22px;
  padding: 18px;
  border-radius: 20px;
  background: linear-gradient(180deg, #f8fbff, #edf4ff);
  border: 1px solid var(--border);
}

.sidebar-info img {
  display: block;
  width: 120px;
  max-width: 100%;
  margin: 0 auto 14px;
}

.sidebar-info h2 {
  margin: 0 0 8px;
  font-size: 18px;
}

.sidebar-info p {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
  font-size: 14px;
}

.content {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  padding: 42px;
}

#pageFrame {
  width: 100%;
  height: 100%;
  border: 0;
  background: transparent;
}

.fixed-footer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  height: var(--footer-height);
  background: var(--surface);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  z-index: 30;
}

.footer-text {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

.footer-text strong {
  color: var(--text);
}

.menu-backdrop {
  display: none;
}

/* Styles utilisés dans les pages chargées dans l'iframe */
.page-body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: transparent;
}

.page-shell {
  width: min(1080px, 100%);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: 40px;
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 14px;
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--primary);
  font-size: 14px;
}

.card h1 {
  margin: 22px 0 20px;
  font-size: 38px;
  line-height: 1.15;
}

.lead {
  margin: 0 0 28px;
  color: #334155;
  font-size: 19px;
  line-height: 1.6;
}

.primary-btn {
  border: 0;
  border-radius: 13px;
  background: var(--primary);
  color: #fff;
  padding: 15px 22px;
  font-size: 17px;
  cursor: pointer;
}

.page-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  align-items: center;
  gap: 32px;
}

.page-copy {
  min-width: 0;
}

.page-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.page-visual img {
  display: block;
  width: 100%;
  max-width: 300px;
  height: auto;
  border-radius: 24px;
}

.steps {
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.steps li {
  padding: 16px;
  border-radius: 14px;
  background: #f8fafc;
  border: 1px solid var(--border);
  color: #334155;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 24px;
}

.contact-box {
  padding: 18px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: #f8fafc;
}

.contact-box strong {
  display: block;
  margin-bottom: 8px;
}

.contact-box p {
  margin: 0;
  color: var(--muted);
}

body.menu-open .sidebar {
  transform: translateX(0);
}

@media (max-width: 900px) {
  body {
    overflow: hidden;
  }

  .topbar {
    height: 78px;
  }

  .brand h1 {
    font-size: 20px;
  }

  .brand p {
    font-size: 13px;
  }

  .layout {
    height: calc(100vh - 78px - var(--footer-height));
  }

  .sidebar {
    position: fixed;
    top: 78px;
    left: 0;
    bottom: var(--footer-height);
    z-index: 25;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    box-shadow: 18px 0 35px rgba(15, 23, 42, 0.14);
  }

  .menu-backdrop {
    display: none;
    position: fixed;
    top: 78px;
    left: 0;
    right: 0;
    bottom: var(--footer-height);
    z-index: 20;
    border: 0;
    background: rgba(15, 23, 42, 0.35);
    cursor: pointer;
  }

  body.menu-open .menu-backdrop {
    display: block;
  }

  .content {
    padding: 22px;
  }

  .card {
    padding: 28px;
  }

  .card h1 {
    font-size: 30px;
  }

  .page-hero {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .page-visual {
    order: -1;
  }

  .page-visual img {
    max-width: 220px;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }
}