:root {
  --sidebar-bg: #1f2a44;
  --sidebar-fg: #c8d0e5;
  --sidebar-active: #e8871a;
  --sidebar-width: 240px;
  --header-height: 56px;
  --accent: #e8871a;
  --accent-dark: #c9700f;
  --body-bg: #f0f2f8;
}

/* ===== RESET / BASE ===== */
body { background: var(--body-bg); margin: 0; padding: 0; }

/* ===== TOP HEADER ===== */
.top-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-height);
  background: var(--sidebar-bg);
  color: #fff;
  z-index: 1040;
  box-shadow: 0 2px 8px rgba(0,0,0,.25);
}

.sidebar-toggle {
  color: #fff;
  background: transparent;
  border: none;
  width: 36px; height: 36px;
  display: grid; place-items: center;
  border-radius: 6px;
  transition: background .15s;
}
.sidebar-toggle:hover { background: rgba(255,255,255,.1); }

.header-brand {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.header-brand-name {
  font-weight: 800;
  font-size: 1.1rem;
  color: #fff;
  letter-spacing: .02em;
}
.header-brand-sub {
  font-size: .7rem;
  color: var(--accent);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
}

.user-avatar {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: rgba(255,255,255,.15);
  display: grid; place-items: center;
  font-size: 1.1rem;
  color: #fff;
  flex-shrink: 0;
}
.user-name  { font-size: .85rem; font-weight: 600; color: #fff; line-height: 1.2; }
.user-role  { font-size: .7rem; color: rgba(255,255,255,.55); }

/* ===== APP LAYOUT ===== */
.app-layout {
  display: flex;
  padding-top: var(--header-height);
  min-height: 100vh;
}

/* ===== SIDEBAR ===== */
.sidebar {
  width: var(--sidebar-width);
  min-height: calc(100vh - var(--header-height));
  background: var(--sidebar-bg);
  flex-shrink: 0;
  position: fixed;
  top: var(--header-height);
  left: 0;
  bottom: 0;
  overflow-y: auto;
  overflow-x: hidden;
  transition: width .2s ease, transform .2s ease;
  display: flex;
  flex-direction: column;
  z-index: 1030;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,.1) transparent;
}
.sidebar.collapsed { width: 0; transform: translateX(-100%); }

/* ===== SIDEBAR NAV ===== */
.sidebar-nav {
  flex: 1;
  padding: .75rem .5rem;
  gap: 2px;
}
.sidebar-nav .nav-item { width: 100%; }

.sidebar-nav .nav-link {
  display: flex;
  align-items: center;
  gap: .65rem;
  color: var(--sidebar-fg);
  padding: .55rem .85rem;
  border-radius: .45rem;
  font-size: .875rem;
  font-weight: 500;
  white-space: nowrap;
  transition: background .15s, color .15s;
}
.sidebar-nav .nav-link i { font-size: 1rem; flex-shrink: 0; }
.sidebar-nav .nav-link:hover  { background: rgba(255,255,255,.07); color: #fff; }
.sidebar-nav .nav-link.active { background: var(--accent); color: #fff; }

/* Arrow chevron rotation */
.nav-arrow { transition: transform .2s; font-size: .75rem !important; }
.nav-link.open .nav-arrow { transform: rotate(90deg); }

/* Sub-menu */
.nav-sub {
  padding: .25rem 0 .25rem 1rem;
  gap: 2px;
}
.nav-sub .nav-link {
  font-size: .825rem;
  padding: .45rem .75rem;
  border-left: 2px solid rgba(255,255,255,.08);
}
.nav-sub .nav-link:hover  { border-left-color: rgba(255,255,255,.25); }
.nav-sub .nav-link.active { border-left-color: var(--accent); background: rgba(232,135,26,.18); }

/* Section label */
.sidebar-section-label {
  font-size: .65rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: rgba(255,255,255,.3);
  padding: .75rem 1rem .2rem;
  font-weight: 700;
}

.sidebar-footer {
  padding: .75rem 1rem;
  border-top: 1px solid rgba(255,255,255,.07);
  font-size: .72rem;
  color: rgba(255,255,255,.3);
}

/* ===== MAIN CONTENT ===== */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: 1rem;
  transition: margin-left .2s ease;
  min-width: 0;
}
.main-content.expanded { margin-left: 0; }

/* ===== BUTTONS ===== */
.btn-accent { background: var(--accent); color:#fff; border:none; }
.btn-accent:hover { background: var(--accent-dark); color:#fff; }
.text-accent { color: var(--accent); }

/* ===== CARDS ===== */
.card-stat { border: none; border-radius: .75rem; box-shadow: 0 1px 6px rgba(0,0,0,.07); background:#fff; }
.card-stat .stat-label { color:#6b7280; font-size:.8rem; text-transform:uppercase; letter-spacing:.05em; }
.card-stat .stat-value { font-size:1.75rem; font-weight:700; color:#1f2a44; }

.card { border: none; border-radius: .75rem; box-shadow: 0 1px 6px rgba(0,0,0,.07); }
.card-header { border-radius: .75rem .75rem 0 0 !important; }

/* ===== TABLES ===== */
.table thead { background: var(--sidebar-bg); color:#fff; }
.table thead th { border:none; }

/* ===== PAGE TITLE BAR ===== */
.page-title-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}
.page-title-bar h3 { margin: 0; font-size: 1.3rem; font-weight: 700; color: #1f2a44; }

/* ===== STAT ICON CARD ===== */
.stat-icon-card {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.stat-icon {
  width: 48px; height: 48px;
  border-radius: .65rem;
  display: grid; place-items: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}

/* ===== PASSENGER ===== */
.passenger-row { display:flex; gap:.5rem; margin-bottom:.5rem; }

/* ===== LOGIN PAGE ===== */
.login-body { min-height: 100vh; background: #eef2f7; }
.login-shell {
  min-height: 100vh;
  display: grid; place-items: center;
  padding: 1.5rem;
}
.login-panel {
  width: min(100%, 420px);
  background: #fff;
  border-radius: .75rem;
  box-shadow: 0 18px 50px rgba(31,42,68,.12);
  padding: 2rem;
}
.login-brand {
  display: flex; align-items: center; gap: .9rem; margin-bottom: 1.5rem;
}
.login-brand i {
  display: grid; place-items: center;
  width: 3rem; height: 3rem;
  border-radius: .75rem;
  background: var(--sidebar-bg); color: #fff; font-size: 1.4rem;
}
.login-brand h1 { margin: 0; color: var(--sidebar-bg); font-size: 1.45rem; font-weight: 700; }
.login-brand p  { margin: 0; color: #6b7280; font-weight: 600; }

/* ===== BADGES ===== */
.badge-active   { background: #d1fae5; color: #065f46; }
.badge-inactive { background: #fee2e2; color: #991b1b; }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); width: var(--sidebar-width); }
  .sidebar.mobile-open { transform: translateX(0); }
  .main-content { margin-left: 0; padding: 1rem; }
}