/* ============================================
   FuelOdo - Responsive Layout
   Laptop: sidebar + full-width content
   Phone:  bottom nav + single-column
   ============================================ */

/* ── Outer background ── */
html {
  background: var(--bg-primary);
}

[data-theme="dark"] html {
  background: #060a14;
}

body {
  margin: 0;
  position: relative;
  min-height: 100vh;
  background: var(--bg-primary);
  overflow-x: hidden;
}

/* ═══════════════════════════════════════════
   SIDEBAR — visible on desktop, drawer on mobile
   ═══════════════════════════════════════════ */
.sidebar {
  position: fixed;
  top: 0; left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-sidebar);
  z-index: 100;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  transition: transform var(--transition-base);
}

.sidebar-header {
  padding: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.sidebar-logo-svg {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.sidebar-brand {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 700;
  color: white;
}

.sidebar-brand span {
  background: linear-gradient(135deg, var(--primary-400), var(--cyan-400));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-4) var(--space-3);
}

.nav-section-title {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.3);
  padding: var(--space-4) var(--space-4) var(--space-2);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  color: var(--text-sidebar);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
  margin-bottom: 2px;
}

.nav-link:hover {
  background: var(--bg-sidebar-hover);
  color: white;
}

.nav-link.active {
  background: linear-gradient(135deg, rgba(99,102,241,0.2), rgba(6,182,212,0.1));
  color: white;
  font-weight: 600;
  border: 1px solid rgba(99,102,241,0.15);
}

.nav-link .nav-icon {
  font-size: 1.2rem;
  width: 24px;
  text-align: center;
  flex-shrink: 0;
}

.sidebar-footer {
  padding: var(--space-4) var(--space-3);
  border-top: 1px solid rgba(255,255,255,0.06);
}

/* ═══════════════════════════════════════════
   TOP HEADER
   ═══════════════════════════════════════════ */
.top-header {
  position: fixed;
  top: 0; right: 0;
  left: var(--sidebar-width);
  height: var(--header-height);
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  transition: left var(--transition-base);
}

/* Subtle accent line under header */
.top-header::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(99,102,241,0.3), rgba(6,182,212,0.2), transparent);
  pointer-events: none;
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.menu-toggle {
  display: none; /* Hidden on desktop, shown on mobile */
  width: 40px; height: 40px;
  border-radius: var(--radius-md);
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  font-size: 1.3rem;
  transition: background var(--transition-fast);
}

.menu-toggle:hover {
  background: var(--bg-tertiary);
}

.header-greeting {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.header-greeting strong {
  color: var(--text-primary);
  font-weight: 600;
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle {
  width: 40px; height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 1.2rem;
  transition: all var(--transition-fast);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
}

.theme-toggle:hover {
  color: var(--text-primary);
  background: var(--bg-glass-hover);
  border-color: var(--border-strong);
}

.user-avatar {
  width: 36px; height: 36px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary-400), var(--cyan-400));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: var(--text-sm);
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(99,102,241,0.25);
  transition: box-shadow var(--transition-fast);
}

.user-avatar:hover {
  box-shadow: 0 2px 16px rgba(99,102,241,0.4);
}

/* ── Header Mobile Branding ── */
.header-center {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
}

.header-brand {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text-primary);
}

.header-brand span {
  background: linear-gradient(135deg, var(--primary-400), var(--cyan-400));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ═══════════════════════════════════════════
   MAIN CONTENT — desktop has left margin
   ═══════════════════════════════════════════ */
.main-content {
  margin-left: var(--sidebar-width);
  padding-top: var(--header-height);
  min-height: 100vh;
  transition: margin-left var(--transition-base);
}

.page-content {
  padding: var(--space-8);
  max-width: 1400px;
  margin: 0 auto;
}

/* ═══════════════════════════════════════════
   DESKTOP defaults — sidebar visible, no mobile nav
   ═══════════════════════════════════════════ */
.mobile-only  { display: none !important; }
.desktop-only { display: flex !important; }

/* Mobile nav hidden on desktop */
.mobile-nav { display: none; }

/* More drawer hidden on desktop */
.more-drawer { display: none; }

/* Sidebar overlay hidden on desktop */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  z-index: 99;
}
.sidebar-overlay.active { display: block; }

/* ── Desktop Grids ── */
.stats-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-6);
}

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

.quick-actions {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.vehicles-grid {
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.form-row {
  grid-template-columns: 1fr 1fr;
}

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

.filter-bar {
  flex-direction: row;
  align-items: center;
}

.filter-bar .form-input {
  width: auto;
  min-width: 160px;
}

.section-header {
  flex-direction: row;
  align-items: center;
}

/* Desktop notif dropdown */
.notif-dropdown {
  position: absolute;
  top: calc(100% + var(--space-2));
  right: 0;
  width: 320px;
}

/* ═══════════════════════════════════════════
   MOBILE — max-width: 768px
   ═══════════════════════════════════════════ */
@media (max-width: 768px) {

  /* Show mobile elements, hide desktop ones */
  .mobile-only  { display: flex !important; }
  .desktop-only { display: none !important; }

  /* ── Sidebar becomes a drawer ── */
  .sidebar {
    width: 100%;
    max-width: 300px;
    transform: translateX(-100%);
    visibility: hidden;
    opacity: 0;
    box-shadow: 4px 0 20px rgba(0,0,0,0.3);
  }

  .sidebar.open {
    transform: translateX(0);
    visibility: visible;
    opacity: 1;
  }

  /* ── Header full-width ── */
  .top-header {
    left: 0;
    padding: 0 var(--space-4);
  }

  /* Show hamburger menu */
  .menu-toggle {
    display: flex;
  }

  /* ── Main content no sidebar margin ── */
  .main-content {
    margin-left: 0;
    padding-bottom: 90px; /* Space for bottom nav */
  }

  .page-content {
    padding: var(--space-4);
  }

  /* ── Mobile Bottom Nav ── */
  .mobile-nav {
    display: block;
    position: fixed;
    bottom: 0; left: 0; right: 0;
    height: 64px;
    background: var(--bg-glass);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-top: 1px solid var(--border-color);
    z-index: 100;
    padding: 0 var(--space-2);
  }

  /* Glow accent line on top of nav */
  .mobile-nav::before {
    content: '';
    position: absolute;
    top: -1px; left: 10%; right: 10%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(99,102,241,0.4), rgba(6,182,212,0.3), transparent);
    pointer-events: none;
  }

  .mobile-nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-around;
    height: 100%;
  }

  .mobile-nav-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: var(--space-2);
    color: var(--text-tertiary);
    font-size: var(--text-xs);
    font-weight: 500;
    transition: color var(--transition-fast);
    min-width: 56px;
  }

  .mobile-nav-btn .mobile-nav-icon {
    font-size: 1.3rem;
    transition: transform var(--transition-fast);
  }

  .mobile-nav-btn.active {
    color: var(--primary-400);
  }

  .mobile-nav-btn.active .mobile-nav-icon {
    transform: scale(1.15);
  }

  .mobile-nav-fab-wrapper {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    height: 100%;
    margin: 0 var(--space-2);
  }

  .mobile-nav-fab {
    position: absolute;
    top: -24px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-400), var(--primary-600));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow:
      0 4px 15px rgba(99, 102, 241, 0.45),
      0 0 20px rgba(99, 102, 241, 0.2);
    text-decoration: none;
    transition: transform var(--transition-spring), box-shadow var(--transition-fast);
  }

  /* Pulsing ring around FAB */
  .mobile-nav-fab::before {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    border: 2px solid rgba(99,102,241,0.3);
    animation: fab-pulse-ring 2.5s ease-in-out infinite;
    pointer-events: none;
  }

  @keyframes fab-pulse-ring {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.15); opacity: 0; }
  }

  .mobile-nav-fab:active {
    transform: scale(0.95);
  }

  .mobile-nav-fab-icon {
    font-size: 2rem;
    line-height: 1;
    font-weight: 300;
  }

  .mobile-nav-text {
    font-size: 0.65rem;
    margin-top: 2px;
    font-weight: 500;
  }

  /* ── More Drawer ── */
  .more-drawer {
    display: block;
    position: fixed;
    bottom: -100%;
    left: 0; right: 0;
    background: var(--bg-secondary);
    border-top-left-radius: var(--radius-2xl);
    border-top-right-radius: var(--radius-2xl);
    z-index: 105;
    padding: var(--space-4);
    box-shadow: 0 -8px 30px rgba(0,0,0,0.2);
    transition: bottom var(--transition-base);
    border: 1px solid var(--border-color);
    border-bottom: none;
  }

  .more-drawer.open {
    bottom: 0;
  }

  /* Pull indicator handle */
  .more-drawer::before {
    content: '';
    position: absolute;
    top: 8px; left: 50%;
    transform: translateX(-50%);
    width: 40px; height: 4px;
    border-radius: var(--radius-full);
    background: var(--text-tertiary);
    opacity: 0.4;
  }

  .more-drawer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-4);
    padding: var(--space-2) 0 var(--space-3);
    border-bottom: 1px solid var(--border-color);
  }

  .more-drawer-header h3 {
    margin: 0;
    font-size: var(--text-lg);
  }

  .more-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-2);
    transition: all var(--transition-fast);
  }

  .more-item:hover {
    background: var(--bg-tertiary);
    transform: translateX(4px);
  }

  .more-icon {
    font-size: 1.25rem;
  }

  .more-divider {
    height: 1px;
    background: var(--border-color);
    margin: var(--space-2) 0;
  }

  /* ── Mobile Grid Overrides ── */
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
  }

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

  .quick-actions {
    grid-template-columns: 1fr 1fr;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

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

  .modal {
    padding: var(--space-6);
    border-radius: var(--radius-xl);
    margin: var(--space-4);
  }

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

  .filter-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .filter-bar .form-input {
    width: 100%;
  }

  .notif-dropdown {
    position: fixed;
    top: var(--header-height);
    left: var(--space-4);
    right: var(--space-4);
    width: auto;
  }

  /* Table to Cards for Mobile */
  #recordsTableContainer {
    background: transparent;
    border: none;
    padding: 0;
  }
  .data-table thead {
    display: none;
  }
  .data-table, .data-table tbody {
    display: block; width: 100%;
  }
  .data-table tbody tr {
    display: flex; flex-direction: column;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-4);
    padding: var(--space-4);
    box-shadow: var(--shadow-sm);
  }
  .data-table tbody tr:hover { background: var(--bg-secondary); }
  .data-table td {
    display: flex; justify-content: space-between; align-items: center;
    padding: var(--space-2) 0; border: none;
  }
  .data-table td:not(:empty)::before {
    content: attr(data-label);
    font-weight: 600; font-size: var(--text-xs); color: var(--text-tertiary);
    text-transform: uppercase; margin-right: 12px;
  }
  .table-actions {
    justify-content: flex-end;
    margin-top: var(--space-2);
    padding-top: var(--space-2);
    border-top: 1px solid var(--border-color);
    width: 100%;
  }

  /* Auth page overrides */
  .auth-card {
    padding: var(--space-6);
  }
  .vehicle-stats {
    grid-template-columns: 1fr;
  }
}

/* ── Small phones ── */
@media (max-width: 400px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .quick-actions {
    grid-template-columns: 1fr;
  }
}