/**
 * Blue Falcon - Base Styles
 * Central stylesheet for all pages
 * Contains theme variables, dark/light mode support, and common component styles
 * WCAG 2.1 AA Compliant
 */

/* ============================================
   SKIP NAVIGATION LINK (WCAG 2.4.1)
   ============================================ */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: #000;
    color: #fff;
    padding: 8px 16px;
    text-decoration: none;
    z-index: 9999;
    border-radius: 0 0 4px 0;
    font-weight: 600;
}

.skip-link:focus {
    top: 0;
    outline: 3px solid #fff;
    outline-offset: 2px;
}

/* ============================================
   FOCUS INDICATORS (WCAG 2.4.7)
   ============================================ */
*:focus {
    outline: 3px solid #58a6ff;
    outline-offset: 2px;
}

/* Remove default outline for mouse users, keep for keyboard */
*:focus:not(:focus-visible) {
    outline: none;
}

*:focus-visible {
    outline: 3px solid #58a6ff;
    outline-offset: 2px;
}

/* High contrast focus for buttons */
.btn:focus-visible,
.form-control:focus,
.form-select:focus {
    outline: 3px solid #58a6ff;
    outline-offset: 2px;
    box-shadow: 0 0 0 4px rgba(88, 166, 255, 0.3);
}

/* CSS Custom Properties - Theme Variables */
:root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-card: #0f3460;
    --text-primary: #eaeaea;
    --text-secondary: #b0b0b0;
    --border-color: #2d3748;
    
    /* Status colors */
    --status-scheduled: #6c757d;
    --status-boarding: #0dcaf0;
    --status-departed: #198754;
    --status-arrived: #20c997;
    --status-delayed: #ffc107;
    --status-cancelled: #dc3545;
    --status-ontime: #198754;
    
    /* Gate colors */
    --gate-available-light: #d4edda;
    --gate-available-dark: rgba(25, 135, 84, 0.3);
    --gate-occupied-light: #fff3cd;
    --gate-occupied-dark: rgba(255, 193, 7, 0.3);
}

/* Dark Mode Base Styles */
[data-bs-theme="dark"] {
    --bs-body-bg: #0d1117;
    --bs-body-color: #c9d1d9;
    --bs-card-bg: #161b22;
    --bs-card-border-color: #30363d;
    --bs-table-bg: #161b22;
    --bs-table-color: #c9d1d9;
    --bs-table-striped-bg: #21262d;
    --bs-table-hover-bg: #30363d;
    --bs-navbar-bg: #161b22;
    --bs-navbar-color: #c9d1d9;
    --bs-list-group-bg: #161b22;
    --bs-list-group-color: #c9d1d9;
    --bs-list-group-border-color: #30363d;
}

/* Light Mode Adjustments */
[data-bs-theme="light"] {
    --bs-body-bg: #ffffff;
    --bs-body-color: #212529;
    --bs-card-bg: #ffffff;
    --bs-card-border-color: #dee2e6;
    --bs-table-bg: #ffffff;
    --bs-table-color: #212529;
}

/* Dark mode card improvements */
[data-bs-theme="dark"] .card {
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.4);
}

/* Dark mode status cards */
[data-bs-theme="dark"] .status-card {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%) !important;
    border: 1px solid #30363d;
}

/* Status Card Base Styles */
.status-card {
    border-radius: 8px;
    padding: 20px;
    text-align: center;
}

/* Left Accent Metric Cards - Modern Design */
.metric-card {
    background: var(--bs-card-bg);
    border: 1px solid var(--bs-card-border-color);
    border-left: 4px solid var(--status-color);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.metric-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.metric-card .metric-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--status-color);
    margin-bottom: 4px;
}

.metric-card .metric-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Status-specific accent colors */
.metric-card.metric-scheduled {
    --status-color: var(--status-scheduled);
}

.metric-card.metric-boarding {
    --status-color: var(--status-boarding);
}

.metric-card.metric-departed {
    --status-color: var(--status-departed);
}

.metric-card.metric-arrived {
    --status-color: var(--status-arrived);
}

.metric-card.metric-delayed {
    --status-color: var(--status-delayed);
}

.metric-card.metric-cancelled {
    --status-color: var(--status-cancelled);
}

.metric-card.metric-ontime {
    --status-color: var(--status-ontime);
}

/* Dark mode metric card improvements */
[data-bs-theme="dark"] .metric-card {
    background: #161b22;
    border-color: #30363d;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

[data-bs-theme="dark"] .metric-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

[data-bs-theme="dark"] .metric-card .metric-label {
    color: #8b949e;
}

/* Light mode metric card */
[data-bs-theme="light"] .metric-card {
    background: #ffffff;
    border-color: #dee2e6;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

[data-bs-theme="light"] .metric-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

[data-bs-theme="light"] .metric-card .metric-label {
    color: #6c757d;
}

/* Responsive metric cards */
@media (max-width: 768px) {
    .metric-card {
        padding: 16px;
    }
    
    .metric-card .metric-value {
        font-size: 1.5rem;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .metric-card {
        border-width: 2px;
    }
}

/* Dark mode status card text visibility */
[data-bs-theme="dark"] .status-card h3,
[data-bs-theme="dark"] .status-card p,
[data-bs-theme="dark"] .status-card .mb-0 {
    color: #f0f0f0 !important;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

/* Ensure all status cards have proper contrast in dark mode */
[data-bs-theme="dark"] .status-card.status-scheduled {
    background: #4a5568 !important;
}
[data-bs-theme="dark"] .status-card.status-boarding {
    background: #0d6efd !important;
}
[data-bs-theme="dark"] .status-card.status-departed {
    background: #198754 !important;
}
[data-bs-theme="dark"] .status-card.status-arrived {
    background: #20c997 !important;
}
[data-bs-theme="dark"] .status-card.status-delayed {
    background: #ffc107 !important;
    color: #000 !important;
}
[data-bs-theme="dark"] .status-card.status-cancelled {
    background: #dc3545 !important;
}
[data-bs-theme="dark"] .status-card.status-ontime {
    background: #198754 !important;
}

.status-scheduled { background: var(--status-scheduled); }
.status-boarding { background: var(--status-boarding); }
.status-departed { background: var(--status-departed); }
.status-arrived { background: var(--status-arrived); }
.status-delayed { background: var(--status-delayed); }
[data-bs-theme="light"] .status-delayed { color: #000; }
[data-bs-theme="dark"] .status-delayed { color: #000; }
.status-cancelled { background: var(--status-cancelled); }
.status-ontime { background: var(--status-ontime); }

/* Dark mode table improvements */
[data-bs-theme="dark"] .flight-table th {
    background: #21262d !important;
    border-bottom: 2px solid #30363d;
}

[data-bs-theme="light"] .flight-table th {
    background: #f8f9fa;
}

/* Flight table styles */
.flight-table {
    font-size: 13px;
}

.flight-table th {
    font-weight: 600;
}

/* Gate colors */
[data-bs-theme="light"] .gate-available {
    background: var(--gate-available-light);
}

[data-bs-theme="dark"] .gate-available {
    background: var(--gate-available-dark) !important;
}

[data-bs-theme="light"] .gate-occupied {
    background: var(--gate-occupied-light);
}

[data-bs-theme="dark"] .gate-occupied {
    background: var(--gate-occupied-dark) !important;
}

/* Permission badge */
.permission-badge {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
}

/* Dark mode text improvements */
[data-bs-theme="dark"] .text-muted {
    color: #8b949e !important;
}

[data-bs-theme="dark"] .table > thead {
    background-color: #21262d;
}

/* Dark mode navbar */
[data-bs-theme="dark"] .navbar {
    border-bottom: 1px solid #30363d;
}

/* Dark mode forms */
[data-bs-theme="dark"] .form-control, 
[data-bs-theme="dark"] .form-select {
    background-color: #21262d;
    border-color: #30363d;
    color: #c9d1d9;
}

[data-bs-theme="dark"] .form-control:focus, 
[data-bs-theme="dark"] .form-select:focus {
    background-color: #30363d;
    border-color: #58a6ff;
}

/* Dark mode buttons */
[data-bs-theme="dark"] .btn-outline-primary {
    border-color: #58a6ff;
    color: #58a6ff;
}

[data-bs-theme="dark"] .btn-outline-primary:hover {
    background-color: #58a6ff;
    color: #0d1117;
}

/* Dark mode badges */
[data-bs-theme="dark"] .badge {
    color: #fff;
}

/* Dark mode list group */
[data-bs-theme="dark"] .list-group-item {
    background-color: #161b22;
    border-color: #30363d;
    color: #c9d1d9;
}

[data-bs-theme="dark"] .list-group-item-action:hover {
    background-color: #21262d;
}

/* Dark mode pagination */
[data-bs-theme="dark"] .page-link {
    background-color: #161b22;
    border-color: #30363d;
    color: #58a6ff;
}

[data-bs-theme="dark"] .page-item.active .page-link {
    background-color: #58a6ff;
    border-color: #58a6ff;
}

/* Dark mode alerts */
[data-bs-theme="dark"] .alert {
    border-color: #30363d;
}

/* Dark mode modal */
[data-bs-theme="dark"] .modal-content {
    background-color: #161b22;
    border-color: #30363d;
}

[data-bs-theme="dark"] .modal-header, 
[data-bs-theme="dark"] .modal-footer {
    border-color: #30363d;
}

/* Dark mode dropdown */
[data-bs-theme="dark"] .dropdown-menu {
    background-color: #161b22;
    border-color: #30363d;
}

[data-bs-theme="dark"] .dropdown-item {
    color: #c9d1d9;
}

[data-bs-theme="dark"] .dropdown-item:hover {
    background-color: #21262d;
    color: #fff;
}

/* Dark mode search icon */
[data-bs-theme="dark"] .search-icon {
    color: #8b949e;
}

/* User avatar circle styles */
.user-avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, #0d6efd 0%, #0a58ca 100%);
    color: white;
    font-weight: 600;
    font-size: 14px;
    text-transform: uppercase;
}

[data-bs-theme="light"] .user-avatar {
    background: linear-gradient(135deg, #0d6efd 0%, #0056b3 100%);
}

/* Theme toggle button */
.theme-toggle {
    background: transparent;
    border: none;
    color: #c9d1d9;
    cursor: pointer;
    padding: 0.5rem;
    font-size: 1.1rem;
    transition: color 0.3s ease;
}

.theme-toggle:hover {
    color: #58a6ff;
}

/* Utility classes */
.text-end {
    text-align: right;
}

/* Common page header styles */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.page-header h1 {
    margin-bottom: 0;
}

/* Card header styles */
.card-header h5,
.card-header h4 {
    margin-bottom: 0;
}

/* Filter form styles */
.filter-form .form-group {
    margin-bottom: 1rem;
}

/* Table enhancements */
.table-responsive {
    margin-bottom: 0;
}

/* Action buttons */
.action-buttons .btn {
    margin-right: 0.25rem;
}

.action-buttons .btn:last-child {
    margin-right: 0;
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 2rem;
}

.empty-state .text-muted {
    margin-bottom: 0;
}

/* Status badge variants */
.badge-status-scheduled { background-color: var(--status-scheduled); }
.badge-status-boarding { background-color: var(--status-boarding); }
.badge-status-departed { background-color: var(--status-departed); }
.badge-status-arrived { background-color: var(--status-arrived); }
.badge-status-delayed { background-color: var(--status-delayed); color: #000; }
.badge-status-cancelled { background-color: var(--status-cancelled); }
.badge-status-ontime { background-color: var(--status-ontime); }

/* ============================================
   ACCESSIBILITY UTILITIES
   ============================================ */

/* Visually hidden - accessible to screen readers but not visible */
.visually-hidden,
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Reduced motion support (WCAG 2.3.3) */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .alert {
        transition: none;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .btn:focus-visible,
    .form-control:focus,
    .form-select:focus,
    a:focus {
        outline: 3px solid currentColor;
        outline-offset: 2px;
    }
}

/* Focus visible for mouse/touch users */
:focus:not(:focus-visible) {
    outline: none;
}

:focus-visible {
    outline: 3px solid #58a6ff;
    outline-offset: 2px;
}

/* ============================================
   HONEYPOT FIELD HIDING (Form Security)
   ============================================ */

/* Honeypot field hiding */
.hp-field {
    position: absolute !important;
    left: -9999px !important;
    opacity: 0 !important;
    pointer-events: none !important;
}

/* Alternative hiding method for extra security */
input[name="website_url"],
input[name="contact_email"],
input[name="phone_number"],
input[class*="hp-"] {
    position: absolute;
    top: -9999px;
    left: -9999px;
}

/* ============================================
   MOBILE RESPONSIVE IMPROVEMENTS
   ============================================ */

/* Small devices (landscape phones, 576px and up) */
@media (max-width: 575.98px) {
    /* Reduce padding on containers */
    .container-fluid {
        padding-left: 0.75rem;
        padding-right: 0.75rem;
    }

    /* Stack metric cards vertically */
    .metric-card {
        margin-bottom: 1rem;
    }

    /* Adjust table for mobile */
    .table-responsive {
        font-size: 0.875rem;
    }

    .table th,
    .table td {
        padding: 0.5rem;
        white-space: nowrap;
    }

    /* Stack form elements */
    .form-row > * {
        margin-bottom: 1rem;
    }

    /* Full-width buttons */
    .btn-group .btn,
    .btn-group-vertical .btn {
        min-width: 100px;
    }

    /* Adjust card headers */
    .card-header h5 {
        font-size: 1rem;
    }

    /* Mobile-friendly navigation */
    .navbar-brand {
        font-size: 1.1rem;
    }

    /* Adjust modal for mobile */
    .modal-dialog {
        margin: 0.5rem;
    }

    .modal-body {
        max-height: calc(100vh - 150px);
        overflow-y: auto;
    }

    /* Touch-friendly form elements */
    .form-control,
    .form-select,
    .btn {
        min-height: 44px;  /* WCAG touch target size */
    }

    /* Adjust pagination */
    .pagination {
        flex-wrap: wrap;
    }

    .page-link {
        margin: 2px;
    }
}

/* Medium devices (tablets, 768px and up) */
@media (max-width: 767.98px) {
    /* Stack columns */
    .col-md-3,
    .col-md-4,
    .col-md-6 {
        margin-bottom: 1rem;
    }

    /* Adjust dashboard metrics */
    .metric-value {
        font-size: 1.5rem;
    }

    /* Hide less important columns on tables */
    .table-hide-mobile {
        display: none;
    }

    /* Adjust chart containers */
    .chart-container {
        height: 250px;
    }
}

/* Large devices (desktops, 992px and up) */
@media (min-width: 992px) {
    .chart-container {
        height: 350px;
    }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
    /* Larger touch targets */
    .btn,
    .nav-link,
    .dropdown-item {
        min-height: 44px;
        padding-top: 0.75rem;
        padding-bottom: 0.75rem;
    }

    /* Remove hover effects on touch devices */
    .flight-card:hover,
    .analytics-card:hover {
        transform: none;
    }

    /* Larger form controls */
    input[type="text"],
    input[type="email"],
    input[type="password"],
    input[type="search"],
    input[type="tel"],
    input[type="url"],
    textarea,
    select {
        font-size: 16px;  /* Prevents zoom on iOS */
    }
}

/* Reduced motion preference (WCAG 2.3.3) */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .btn {
        border-width: 2px;
    }

    .card {
        border-width: 2px;
    }

    :focus {
        outline-width: 4px;
    }
}

/* Print styles */
@media print {
    .navbar,
    .sidebar,
    .btn,
    .no-print {
        display: none !important;
    }

    .container-fluid {
        width: 100%;
        padding: 0;
    }

    .card {
        break-inside: avoid;
        border: none;
        box-shadow: none;
    }

    a[href]::after {
        content: " (" attr(href) ")";
    }
}