/* ═══════════════════════════════════════════════════════════
   FlightVal2 — Aerospace Professional Design System
   ═══════════════════════════════════════════════════════════ */

:root {
    /* Palette — derived from logo blue tones */
    --navy-900: #0a1628;
    --navy-800: #0f2035;
    --navy-700: #152d48;
    --navy-600: #1a3a5c;
    --navy-500: #1e4d7b;
    --slate-900: #1e293b;
    --slate-800: #2d3a4f;
    --slate-700: #3d4f66;
    --slate-600: #526580;
    --slate-500: #64748b;
    --slate-400: #94a3b8;
    --slate-300: #cbd5e1;
    --slate-200: #e2e8f0;
    --slate-100: #f1f5f9;
    --slate-50: #f8fafc;
    --sky-500: #0ea5e9;
    --sky-400: #38bdf8;
    --sky-300: #7dd3fc;
    --sky-200: #bae6fd;
    --amber-500: #f59e0b;
    --amber-400: #fbbf24;
    --emerald-500: #10b981;
    --emerald-400: #34d399;
    --red-500: #ef4444;
    --red-400: #f87171;
    --white: #ffffff;

    /* Semantic tokens */
    --bg-page: var(--slate-100);
    --bg-card: var(--white);
    --bg-card-hover: var(--slate-50);
    --border-card: var(--slate-200);
    --text-primary: var(--slate-900);
    --text-secondary: var(--slate-600);
    --text-muted: var(--slate-500);
    --accent: var(--sky-500);
    --accent-hover: var(--sky-400);

    /* Typography */
    --font-ui: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Cascadia Code', 'Fira Code', monospace;

    /* Spacing */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
    --shadow-lg: 0 10px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
    --shadow-glow: 0 0 20px rgba(14, 165, 233, 0.15);
}

/* ─── Base ─────────────────────────────────────────────── */

body {
    font-family: var(--font-ui);
    background-color: var(--bg-page);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--text-primary);
}

h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--slate-200);
}

/* ─── Navbar ───────────────────────────────────────────── */

.navbar {
    background: linear-gradient(135deg, var(--navy-900) 0%, var(--navy-800) 40%, var(--navy-700) 100%);
    box-shadow: 0 2px 12px rgba(10, 22, 40, 0.35);
    padding: 0.4rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
    padding: 0.25rem 0;
}

.brand-text {
    color: var(--white);
}

.brand-accent {
    color: var(--sky-400);
    font-weight: 300;
}

.navbar-brand img {
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
    transition: transform 0.2s ease;
}

.navbar-brand:hover img {
    transform: scale(1.05);
}

.nav-icon {
    margin-right: 5px;
    opacity: 0.7;
    vertical-align: -2px;
}

.navbar .nav-link {
    font-weight: 500;
    font-size: 0.875rem;
    padding: 0.5rem 0.85rem !important;
    border-radius: var(--radius-sm);
    margin: 0 1px;
    transition: all 0.2s ease;
    color: rgba(255, 255, 255, 0.75);
    position: relative;
}

.navbar .nav-link:hover {
    background-color: rgba(255, 255, 255, 0.08);
    color: var(--white);
}

.navbar .nav-link:hover .nav-icon {
    opacity: 1;
}

.navbar .nav-link.active {
    font-weight: 600;
    color: var(--white);
    background-color: rgba(14, 165, 233, 0.15);
}

.navbar .nav-link.active .nav-icon {
    opacity: 1;
    color: var(--sky-400);
}

.navbar .nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--sky-400);
    border-radius: 1px;
}

/* Navbar mission selector */
.navbar-mission-ctx {
    gap: 0.5rem;
}

#nav-mission-select {
    background-color: rgba(255, 255, 255, 0.07);
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    font-weight: 500;
    max-width: 300px;
    transition: all 0.2s ease;
}

#nav-mission-select:focus {
    background-color: rgba(255, 255, 255, 0.12);
    color: var(--white);
    border-color: var(--sky-400);
    box-shadow: 0 0 0 2px rgba(14, 165, 233, 0.2);
}

#nav-mission-select option {
    background-color: var(--navy-900);
    color: var(--white);
}

.btn-new-mission {
    background: rgba(14, 165, 233, 0.2);
    color: var(--sky-300);
    border: 1px solid rgba(14, 165, 233, 0.3);
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    font-weight: 600;
    white-space: nowrap;
    transition: all 0.2s ease;
}

.btn-new-mission:hover {
    background: rgba(14, 165, 233, 0.3);
    color: var(--white);
    border-color: var(--sky-400);
    box-shadow: var(--shadow-glow);
}

/* ─── Cards ────────────────────────────────────────────── */

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.2s ease;
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    background: var(--slate-50);
    border-bottom: 1px solid var(--border-card);
    border-radius: var(--radius-md) var(--radius-md) 0 0 !important;
    padding: 0.75rem 1rem;
}

.card-header h5 {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.card-body h2 {
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 0;
}

/* ─── Dashboard Stat Cards ─────────────────────────────── */

.stat-card {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border-card);
    border-radius: var(--radius-lg);
    transition: all 0.25s ease;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--sky-500), var(--sky-400));
    opacity: 0;
    transition: opacity 0.25s ease;
}

.stat-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.stat-card:hover::before {
    opacity: 1;
}

.stat-card .stat-value {
    font-size: 2.25rem;
    font-weight: 700;
    font-family: var(--font-mono);
    letter-spacing: -0.03em;
    color: var(--navy-700);
    line-height: 1.1;
}

.stat-card .stat-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.stat-card .stat-icon {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: var(--slate-100);
    color: var(--slate-500);
}

/* ─── Tables ───────────────────────────────────────────── */

.table {
    font-size: 0.875rem;
}

.table > :not(caption) > * > * {
    padding: 0.625rem 0.75rem;
}

.table thead th {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    border-bottom: 2px solid var(--slate-200);
    background: var(--slate-50);
}

.table-success {
    background-color: rgba(16, 185, 129, 0.08) !important;
}

/* ─── Details Table (Aerodromes) ───────────────────────── */

.details-table {
    width: 100%;
    border-collapse: collapse;
}

.details-table th,
.details-table td {
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--slate-200);
    vertical-align: middle;
}

.details-table th {
    width: 150px;
    font-weight: 600;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.details-table td .form-control,
.details-table td .form-select {
    max-width: 220px;
}

/* ─── Forms ────────────────────────────────────────────── */

.form-control,
.form-select {
    border: 1px solid var(--slate-300);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--sky-500);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.12);
}

.form-control-sm,
.form-select-sm {
    font-size: 0.8125rem;
    border-radius: var(--radius-sm);
}

.form-label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-label-sm {
    font-size: 0.75rem;
}

.form-check-input:checked {
    background-color: var(--sky-500);
    border-color: var(--sky-500);
}

/* ─── Buttons ──────────────────────────────────────────── */

.btn {
    font-weight: 500;
    font-size: 0.875rem;
    border-radius: var(--radius-sm);
    transition: all 0.15s ease;
    letter-spacing: 0.01em;
}

.btn-primary {
    background: linear-gradient(135deg, var(--sky-500), var(--navy-500));
    border-color: var(--sky-500);
    box-shadow: var(--shadow-xs);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--sky-400), var(--navy-600));
    box-shadow: var(--shadow-sm);
}

.btn-outline-primary {
    color: var(--sky-500);
    border-color: var(--sky-500);
}

.btn-outline-primary:hover {
    background: var(--sky-500);
    border-color: var(--sky-500);
    box-shadow: var(--shadow-sm);
}

.btn-outline-danger {
    font-size: 0.8125rem;
}

.btn-sm {
    font-size: 0.8125rem;
    border-radius: var(--radius-sm);
}

/* ─── Badges ───────────────────────────────────────────── */

.badge {
    font-weight: 600;
    font-size: 0.75rem;
    letter-spacing: 0.02em;
    border-radius: var(--radius-sm);
}

.badge + .badge {
    margin-left: 0.25rem;
}

.badge.bg-success {
    background: linear-gradient(135deg, var(--emerald-500), #059669) !important;
}

.badge.bg-primary {
    background: linear-gradient(135deg, var(--sky-500), var(--navy-500)) !important;
}

.badge.bg-danger {
    background: linear-gradient(135deg, var(--red-500), #dc2626) !important;
}

.badge.bg-warning {
    background: linear-gradient(135deg, var(--amber-500), #d97706) !important;
}

/* ─── Tabs ─────────────────────────────────────────────── */

.nav-tabs {
    border-bottom: 2px solid var(--slate-200);
}

.nav-tabs .nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    padding: 0.625rem 1rem;
    transition: all 0.15s ease;
    border-radius: 0;
}

.nav-tabs .nav-link:hover {
    color: var(--text-primary);
    border-bottom-color: var(--slate-400);
    background: none;
}

.nav-tabs .nav-link.active {
    font-weight: 600;
    color: var(--sky-500);
    border-bottom-color: var(--sky-500);
    background: none;
}

/* ─── Alerts ───────────────────────────────────────────── */

.alert {
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    border: none;
    box-shadow: var(--shadow-xs);
}

.alert-warning {
    background: linear-gradient(135deg, #fffbeb, #fef3c7);
    color: #92400e;
    border-left: 4px solid var(--amber-500);
}

.alert-info {
    background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
    color: #0c4a6e;
    border-left: 4px solid var(--sky-500);
}

.alert-danger {
    background: linear-gradient(135deg, #fef2f2, #fee2e2);
    color: #991b1b;
    border-left: 4px solid var(--red-500);
}

#alert-banner .alert {
    margin-bottom: 0;
    border-radius: 0;
}

/* ─── Modals ───────────────────────────────────────────── */

.modal-content {
    border-radius: var(--radius-lg);
    border: none;
    box-shadow: 0 25px 60px rgba(15, 23, 42, 0.2);
}

.modal-header {
    border-bottom: 1px solid var(--slate-200);
    padding: 1rem 1.25rem;
}

.modal-title {
    font-weight: 600;
    font-size: 1.0625rem;
}

.modal-body {
    padding: 1.25rem;
}

.modal-footer {
    border-top: 1px solid var(--slate-200);
    padding: 0.75rem 1.25rem;
}

/* ─── Procedure Details ────────────────────────────────── */

.procedure-details {
    background-color: var(--slate-50);
    padding: 1rem;
    border-radius: var(--radius-md);
    margin-top: 0.5rem;
}

.procedure-details h5 {
    color: var(--sky-500);
    margin-bottom: 1rem;
}

.procedure-item {
    border-left: 3px solid var(--sky-500);
    padding-left: 1rem;
    margin-bottom: 1rem;
}

.procedure-item:last-child {
    margin-bottom: 0;
}

.procedure-url {
    word-break: break-all;
}

/* ─── Expand/collapse ──────────────────────────────────── */

.expand-button {
    cursor: pointer;
    color: var(--sky-500);
}

.expand-button:hover {
    color: var(--navy-600);
}

/* ─── Mission Stops ────────────────────────────────────── */

.stop-card {
    border-left: 3px solid var(--sky-500);
    margin-bottom: 0.75rem;
}

.stop-card.active {
    border-left-color: var(--emerald-500);
    background-color: rgba(16, 185, 129, 0.03);
}

/* ─── Contact Fields ───────────────────────────────────── */

.contact-group label {
    font-size: 0.8125rem;
    margin-bottom: 0.15rem;
}

.contact-group .form-control {
    font-size: 0.8125rem;
}

/* ─── Scrollable Containers ────────────────────────────── */

.scrollable-list {
    max-height: 70vh;
    overflow-y: auto;
}

/* ─── Section Headers ──────────────────────────────────── */

h5.mt-3,
h5.mt-4 {
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--slate-200);
}

/* ─── Route Badges (Drag & Drop) ───────────────────────── */

.route-draggable {
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.route-draggable:hover {
    transform: scale(1.03);
    box-shadow: var(--shadow-sm);
}

/* ─── List Groups ──────────────────────────────────────── */

.list-group-item {
    border-color: var(--slate-200);
    transition: background-color 0.15s ease;
}

.list-group-item-action:hover {
    background-color: var(--slate-50);
}

/* ─── UTC Offset Display ───────────────────────────────── */

.utc-offset-display {
    font-size: 0.875rem;
    padding: 0.375rem 0.625rem;
    background: var(--slate-50);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--sky-500);
}

/* ─── Spinner ──────────────────────────────────────────── */

.spinner-border {
    color: var(--sky-500);
}

/* ─── Selection / Focus ────────────────────────────────── */

::selection {
    background: rgba(14, 165, 233, 0.2);
    color: var(--text-primary);
}

/* ─── Scrollbar Styling ────────────────────────────────── */

::-webkit-scrollbar {
    width: 7px;
    height: 7px;
}

::-webkit-scrollbar-track {
    background: var(--slate-100);
}

::-webkit-scrollbar-thumb {
    background: var(--slate-400);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--slate-500);
}

/* ─── Monospace Data ───────────────────────────────────── */

.font-mono {
    font-family: var(--font-mono);
}

/* ─── Animations ───────────────────────────────────────── */

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

#app-content {
    animation: fadeIn 0.25s ease;
}

/* ─── Responsive ───────────────────────────────────────── */

@media (max-width: 992px) {
    .navbar-mission-ctx {
        margin-top: 0.5rem;
        width: 100%;
    }

    #nav-mission-select {
        max-width: none;
        flex: 1;
    }
}