/**
 * Hotel Shuttle Bus Ride Manager - Modern UI Stylesheet
 * Self-contained, lightweight, zero external dependencies (100% offline capable)
 */

:root {
  --color-primary: #1e40af;
  --color-primary-hover: #1d4ed8;
  --color-primary-light: #eff6ff;
  --color-primary-border: #bfdbfe;
  
  --color-text-main: #0f172a;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --color-bg-body: #f8fafc;
  --color-bg-card: #ffffff;
  
  --color-success: #059669;
  --color-success-bg: #ecfdf5;
  --color-success-border: #a7f3d0;
  
  --color-danger: #dc2626;
  --color-danger-bg: #fef2f2;
  --color-danger-border: #fecaca;
  
  --color-warning: #d97706;
  --color-warning-bg: #fffbeb;
  --color-warning-border: #fde68a;
  
  --color-locked: #64748b;
  --color-locked-bg: #f1f5f9;
  --color-locked-border: #cbd5e1;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

/* Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  color: var(--color-text-main);
  background-color: var(--color-bg-body);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.15s ease-in-out;
}
a:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

/* Top Navigation Bar */
.navbar {
  background-color: #ffffff;
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}
.navbar-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-text-main);
}
.navbar-brand span.badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  background: var(--color-primary-light);
  color: var(--color-primary);
}
.navbar-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.nav-link {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: all 0.15s;
}
.nav-link:hover, .nav-link.active {
  color: var(--color-primary);
  background-color: var(--color-primary-light);
  text-decoration: none;
}
.nav-user {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  border-left: 1px solid var(--color-border);
  padding-left: 1rem;
}
.btn-logout {
  padding: 0.35rem 0.7rem;
  font-size: 0.85rem;
  color: #b91c1c;
  background: #fef2f2;
  border-radius: var(--radius-sm);
}
.btn-logout:hover {
  background: #fee2e2;
  color: #991b1b;
  text-decoration: none;
}

/* Breadcrumbs */
.breadcrumbs-bar {
  background-color: #ffffff;
  border-bottom: 1px solid var(--color-border);
  padding: 0.5rem 1.25rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}
.breadcrumbs-bar-inner {
  max-width: 1280px;
  margin: 0 auto;
}
.breadcrumbs-bar a {
  color: var(--color-text-muted);
}
.breadcrumbs-bar a:hover {
  color: var(--color-primary);
}
.breadcrumbs-separator {
  margin: 0 0.4rem;
  color: #94a3b8;
}

/* Page Container */
.main-container {
  max-width: 1280px;
  width: 100%;
  margin: 1.5rem auto;
  padding: 0 1.25rem;
  flex: 1;
}

/* Alerts */
.alert {
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.25rem;
  font-size: 0.95rem;
}
.alert ul {
  margin-left: 1.25rem;
  margin-top: 0.35rem;
}
.alert-success {
  background-color: var(--color-success-bg);
  border: 1px solid var(--color-success-border);
  color: #065f46;
}
.alert-error {
  background-color: var(--color-danger-bg);
  border: 1px solid var(--color-danger-border);
  color: #991b1b;
}
.alert-warning {
  background-color: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
  color: #92400e;
}
.alert-info {
  background-color: var(--color-primary-light);
  border: 1px solid var(--color-primary-border);
  color: #1e3a8a;
}

/* Cards & Layout */
.card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
  overflow: hidden;
}
.card-header {
  padding: 1rem 1.25rem;
  background-color: #ffffff;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.card-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-text-main);
}
.card-body {
  padding: 1.25rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.25rem;
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

/* Forms */
.form-group {
  margin-bottom: 1.15rem;
}
.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.88rem;
  color: #334155;
  margin-bottom: 0.35rem;
}
.form-control {
  width: 100%;
  padding: 0.6rem 0.85rem;
  font-size: 0.95rem;
  border: 1px solid #cbd5e1;
  border-radius: var(--radius-sm);
  background-color: #ffffff;
  color: var(--color-text-main);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}
.form-text {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-weight: 500;
  font-size: 0.9rem;
  padding: 0.55rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease-in-out;
  text-decoration: none !important;
}
.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff;
}
.btn-primary:hover {
  background-color: var(--color-primary-hover);
  color: #ffffff;
}
.btn-secondary {
  background-color: #f1f5f9;
  border-color: #cbd5e1;
  color: #334155;
}
.btn-secondary:hover {
  background-color: #e2e8f0;
  color: #1e293b;
}
.btn-danger {
  background-color: #ef4444;
  color: #ffffff;
}
.btn-danger:hover {
  background-color: #dc2626;
  color: #ffffff;
}
.btn-sm {
  padding: 0.3rem 0.6rem;
  font-size: 0.8rem;
}

/* Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  text-align: left;
}
.table th, .table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}
.table th {
  background-color: #f8fafc;
  color: #475569;
  font-weight: 600;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.table tr:hover td {
  background-color: #f8fafc;
}

/* Badges & Status */
.badge {
  display: inline-block;
  padding: 0.25rem 0.55rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  line-height: 1;
}
.badge-success { background: var(--color-success-bg); color: #047857; border: 1px solid var(--color-success-border); }
.badge-danger  { background: var(--color-danger-bg); color: #b91c1c; border: 1px solid var(--color-danger-border); }
.badge-warning { background: var(--color-warning-bg); color: #b45309; border: 1px solid var(--color-warning-border); }
.badge-info    { background: var(--color-primary-light); color: var(--color-primary); border: 1px solid var(--color-primary-border); }
.badge-locked  { background: var(--color-locked-bg); color: #475569; border: 1px solid var(--color-locked-border); }

/* Schedule Slot Row Styling */
.ride-slot-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 1.25rem;
  background: #ffffff;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.ride-slot-header {
  padding: 0.75rem 1.25rem;
  background-color: #f1f5f9;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.ride-slot-time {
  font-size: 1.1rem;
  font-weight: 700;
  color: #0f172a;
}
.ride-slot-van {
  font-size: 0.9rem;
  color: #475569;
  margin-left: 0.75rem;
}
.ride-slot-hotel-tag {
  font-size: 0.82rem;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  background: #e0e7ff;
  color: #3730a3;
  font-weight: 600;
  margin-left: 0.5rem;
}
.booking-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid #f1f5f9;
  font-size: 0.92rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.booking-row:last-child {
  border-bottom: none;
}
.booking-info {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.booking-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--color-text-muted);
}
.empty-state h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: #334155;
}

/* Calendar Styles */
.calendar-table {
  width: 100%;
  border-collapse: collapse;
}
.calendar-table th, .calendar-table td {
  border: 1px solid var(--color-border);
  text-align: center;
  padding: 0.75rem;
}
.calendar-table th {
  background-color: #f8fafc;
  font-weight: 600;
  font-size: 0.85rem;
}
.calendar-day-cell {
  height: 80px;
  vertical-align: top;
  text-align: left;
  position: relative;
  transition: background-color 0.15s;
}
.calendar-day-cell:hover {
  background-color: var(--color-primary-light);
  cursor: pointer;
}
.calendar-day-number {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 0.25rem;
}
.calendar-today {
  background-color: #f0fdf4 !important;
  border: 2px solid #22c55e !important;
}

/* Footer */
footer {
  margin-top: auto;
  border-top: 1px solid var(--color-border);
  background: #ffffff;
  padding: 1.25rem;
  text-align: center;
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

/* Mobile Responsive Adjustments */
@media (max-width: 768px) {
  .navbar-inner {
    flex-direction: column;
    align-items: flex-start;
  }
  .nav-user {
    border-left: none;
    padding-left: 0;
    margin-top: 0.5rem;
    width: 100%;
    justify-content: space-between;
  }
  .booking-row {
    flex-direction: column;
    align-items: flex-start;
  }
  .calendar-day-cell {
    height: 50px;
    padding: 0.3rem;
  }
}