:root {
  --menu-w: 248px;
  --menu-w-collapsed: 72px;
  --menu-bg: #ffffff;
  --menu-border: #e7ecf3;
  --menu-text: #334155;
  --menu-muted: #64748b;
  --menu-brand: #0f4c97;
  --menu-brand-2: #0b3a73;
  --menu-active-bg: #eef6ff;
  --menu-active-text: #0b4a8f;
  --menu-radius: 14px;
}

* { box-sizing: border-box; }
html, body { min-height: 100%; }
body.travel-app {
  margin: 0;
  background: #f7f9fc;
  color: #1f2937;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 14px;
}
.app-shell { display: grid; grid-template-columns: var(--menu-w) minmax(0, 1fr); min-height: 100vh; }
.app-sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
  background: var(--menu-bg);
  border-right: 1px solid var(--menu-border);
  padding: 20px 14px 16px;
}
.sidebar-brand {
  position: relative;
  display: grid;
  grid-template-columns: 44px minmax(0,1fr) 34px;
  gap: 12px;
  align-items: center;
  padding: 8px 4px 18px;
  border-bottom: 1px solid var(--menu-border);
  margin-bottom: 14px;
}
.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 13px;
  background: linear-gradient(135deg, var(--menu-brand), var(--menu-brand-2));
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 20px;
  text-decoration: none;
  box-shadow: 0 12px 24px rgba(15, 76, 151, .18);
}
.brand-text strong { display:block; font-size: 17px; color:#111827; line-height:1.15; }
.brand-text span { display:block; color: var(--menu-muted); font-size: 12px; margin-top: 2px; }
.menu-toggle {
  width: 34px;
  height: 34px;
  border: 1px solid var(--menu-border);
  border-radius: 12px;
  background: #fff;
  color: var(--menu-muted);
  cursor: pointer;
}
.sidebar-nav { display: grid; gap: 4px; }
.nav-item {
  min-height: 40px;
  display: grid;
  grid-template-columns: 34px minmax(0,1fr) auto;
  gap: 8px;
  align-items: center;
  padding: 7px 10px;
  border-radius: 12px;
  color: var(--menu-text);
  text-decoration: none;
  font-weight: 500;
  transition: background .15s ease, color .15s ease, transform .15s ease;
}
.nav-item:hover { background: #f3f7fb; color: var(--menu-active-text); }
.nav-item.active { background: var(--menu-active-bg); color: var(--menu-active-text); font-weight: 700; }
.nav-icon {
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: inherit;
  font-size: 15px;
}
.nav-label { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.nav-badge { border-radius: 999px; padding: 2px 7px; background: #e2e8f0; color: #475569; font-size: 11px; }
.sidebar-section-title {
  margin: 24px 10px 10px;
  color: #64748b;
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  font-weight: 800;
}
.sidebar-nav.compact .nav-item { min-height: 34px; padding: 5px 10px; font-size: 13px; }
.sidebar-nav.compact .nav-icon { font-size: 12px; color: #16a34a; }
.sidebar-footer-card {
  margin-top: 22px;
  border: 1px solid #dbeafe;
  background: linear-gradient(135deg, #eff6ff, #ffffff);
  border-radius: 16px;
  padding: 14px;
  color: #334155;
}
.sidebar-footer-card strong { display:block; color:#0f172a; font-size:13px; }
.sidebar-footer-card span { display:block; margin-top:4px; color:#64748b; font-size:12px; line-height:1.35; }
.app-main { min-width: 0; display:flex; flex-direction:column; min-height: 100vh; }
.topbar {
  min-height: 66px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 20px;
  padding: 14px 20px;
  background: rgba(255,255,255,.92);
  border-bottom: 1px solid var(--menu-border);
  backdrop-filter: blur(10px);
}
.topbar h1 { margin: 3px 0 0; font-size: 22px; line-height:1.15; color:#111827; }
.breadcrumb { color:#64748b; font-size: 12px; }
.user-mini { text-align:right; font-size:12px; color:#64748b; }
.user-mini strong { display:block; color:#0f172a; font-size:13px; }
.page-content { padding: 0; min-width: 0; flex: 1 1 auto; }
body.menu-collapsed .app-shell { grid-template-columns: var(--menu-w-collapsed) minmax(0,1fr); }
body.menu-collapsed .app-sidebar { padding-left: 10px; padding-right: 10px; }
body.menu-collapsed .brand-text,
body.menu-collapsed .nav-label,
body.menu-collapsed .nav-badge,
body.menu-collapsed .sidebar-section-title,
body.menu-collapsed .sidebar-footer-card { display:none; }
body.menu-collapsed .sidebar-brand { grid-template-columns: 44px; justify-content:center; padding-bottom: 12px; }
body.menu-collapsed .menu-toggle { position:absolute; right:-5px; top:0; }
body.menu-collapsed .nav-item { grid-template-columns: 1fr; justify-items:center; padding: 7px; }
body.menu-collapsed .nav-icon { width:34px; height:34px; }
@media (max-width: 980px) {
  .app-shell { grid-template-columns: 1fr; }
  .app-sidebar { position: fixed; z-index: 1000; inset: 0 auto 0 0; width: min(88vw, var(--menu-w)); transform: translateX(-110%); transition: transform .2s ease; box-shadow: 0 30px 80px rgba(15,23,42,.22); }
  body.menu-open .app-sidebar { transform: translateX(0); }
  body.menu-collapsed .app-shell { grid-template-columns: 1fr; }
  body.menu-collapsed .brand-text,
  body.menu-collapsed .nav-label,
  body.menu-collapsed .sidebar-section-title,
  body.menu-collapsed .sidebar-footer-card { display:block; }
  body.menu-collapsed .sidebar-brand { grid-template-columns: 44px minmax(0,1fr) 34px; justify-content:initial; }
  body.menu-collapsed .nav-item { grid-template-columns: 34px minmax(0,1fr) auto; justify-items:initial; }
}