:root {
    /* Couleurs principales */
    --primary-blue: #2563eb;
    --primary-green: #10b981;
    --accent-red: #ef4444;
    --dark-bg: #0f172a;
    --dark-secondary: #1e293b;
    --card-bg: #ffffff;
    
    /* Gradients */
    --gradient-blue: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    --gradient-green: linear-gradient(135deg, #34d399 0%, #10b981 100%);
    --gradient-red: linear-gradient(135deg, #f87171 0%, #ef4444 100%);
    --gradient-dark: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    --gradient-bg: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    
    /* Ombres */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.18);
    --shadow-glow-blue: 0 8px 32px rgba(37, 99, 235, 0.3);
    --shadow-glow-green: 0 8px 32px rgba(16, 185, 129, 0.3);
    --shadow-glow-red: 0 8px 32px rgba(239, 68, 68, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: var(--gradient-bg);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
    color: var(--dark-bg);
}

/* Animation de fond */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(37, 99, 235, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 70% 50%, rgba(16, 185, 129, 0.08) 0%, transparent 50%);
    animation: floatBackground 20s ease-in-out infinite;
    pointer-events: none;
    z-index: 0;
}

@keyframes floatBackground {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(-5%, 5%) rotate(5deg); }
    66% { transform: translate(5%, -5%) rotate(-5deg); }
}

.container-fluid {
    position: relative;
    z-index: 1;
}

/* NAVBAR MODERNE */
.navbar {
    background: var(--dark-bg) !important;
    backdrop-filter: blur(20px);
    border-bottom: 2px solid rgba(37, 99, 235, 0.3);
    padding: 1rem 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--card-bg) !important;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.navbar-brand i {
    background: var(--gradient-blue);
    padding: 0.5rem;
    border-radius: 10px;
    box-shadow: var(--shadow-glow-blue);
}

.navbar-brand:hover {
    transform: translateX(5px);
}

.navbar .btn {
    border-radius: 10px;
    padding: 0.5rem 1.25rem;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.navbar .btn-light {
    background: rgba(255, 255, 255, 0.1);
    color: var(--card-bg);
    border-color: rgba(255, 255, 255, 0.2);
}

.navbar .btn-light:hover {
    background: var(--gradient-green);
    border-color: var(--primary-green);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-green);
}

/* CARTE DE FILTRES */
.card {
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

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

.card-body {
    padding: 1.5rem;
}

.form-label {
    font-weight: 600;
    color: var(--dark-secondary);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.form-control,
.form-select,
.multiselect-dropdown {
    border-radius: 10px;
    border: 2px solid #e2e8f0;
    padding: 0.625rem 1rem;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    background: white;
}

.form-control:focus,
.form-select:focus,
.multiselect-dropdown:hover {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
    outline: none;
}

.btn-primary {
    background: var(--gradient-blue);
    border: none;
    border-radius: 10px;
    padding: 0.625rem 1.5rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-blue);
}

.btn-outline-secondary {
    border: 2px solid #cbd5e0;
    border-radius: 10px;
    padding: 0.625rem 1.5rem;
    font-weight: 600;
    transition: all 0.3s ease;
    background: white;
    color: var(--dark-secondary);
}

.btn-outline-secondary:hover {
    background: var(--dark-secondary);
    border-color: var(--dark-secondary);
    color: white;
    transform: translateY(-2px);
}

/* CARTES STATISTIQUES ULTRA-MODERNES */
.stat-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 1.75rem;
    border: none;
    box-shadow: var(--shadow-md);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
    height: 100%;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-blue);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.stat-card:hover::before {
    transform: scaleX(1);
}

.stat-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

/* Styles spécifiques par type de carte */
.stat-card.border-primary::before {
    background: var(--gradient-blue);
}

.stat-card.border-primary:hover {
    box-shadow: var(--shadow-glow-blue);
}

.stat-card.border-success::before {
    background: var(--gradient-green);
}

.stat-card.border-success:hover {
    box-shadow: var(--shadow-glow-green);
}

.stat-card.border-warning::before {
    background: var(--gradient-red);
}

.stat-card.border-warning:hover {
    box-shadow: var(--shadow-glow-red);
}

.stat-card.border-info::before {
    background: var(--gradient-dark);
}

.stat-card.border-info:hover {
    box-shadow: 0 8px 32px rgba(15, 23, 42, 0.3);
}

.stat-card .text-primary {
    color: var(--primary-blue) !important;
}

.stat-card .text-success {
    color: var(--primary-green) !important;
}

.stat-card .text-warning {
    color: var(--accent-red) !important;
}

.stat-card .text-info {
    color: var(--dark-secondary) !important;
}

.stat-card i {
    transition: all 0.3s ease;
}

.stat-card:hover i {
    transform: scale(1.1) rotate(5deg);
}

.stat-card h4 {
    font-weight: 700;
    color: var(--dark-bg);
}

.stat-card h6 {
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge {
    padding: 0.375rem 0.75rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.8rem;
}

.badge.bg-success {
    background: var(--gradient-green) !important;
}

.badge.bg-danger {
    background: var(--gradient-red) !important;
}

/* CARTES DE GRAPHIQUES */
.chart-card {
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(0, 0, 0, 0.08);
    overflow: hidden;
    transition: all 0.3s ease;
}

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

.chart-card .card-header {
    background: linear-gradient(135deg, var(--dark-bg) 0%, var(--dark-secondary) 100%);
    padding: 1.25rem 1.5rem;
    border-bottom: 2px solid var(--primary-blue);
}

.chart-card .card-header h5 {
    font-weight: 700;
    color: var(--card-bg);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.chart-card .card-header i {
    color: var(--primary-green);
}

.chart-card .card-body {
    padding: 2rem;
}

.chart-container {
    position: relative;
    height: 350px;
}

/* BOUTON PLEIN ÉCRAN */
.fullscreen-btn {
    border-radius: 8px;
    padding: 0.375rem 0.75rem;
    transition: all 0.3s ease;
    border: 2px solid rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.fullscreen-btn:hover {
    background: var(--gradient-green);
    border-color: var(--primary-green);
    color: white;
    transform: scale(1.05);
    box-shadow: var(--shadow-glow-green);
}

.fullscreen-btn i {
    transition: transform 0.3s ease;
}

/* MODE PLEIN ÉCRAN */
.chart-card.fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    margin: 0;
    border-radius: 0;
    max-width: 100%;
    width: 100vw;
    height: 100vh;
}

.chart-card.fullscreen .chart-container {
    height: calc(100vh - 120px);
}

.chart-card.fullscreen .fullscreen-btn i::before {
    content: "\f066";
}

.fullscreen-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(4px);
    z-index: 9998;
    display: none;
}

.fullscreen-overlay.active {
    display: block;
}

/* MULTISELECT CUSTOM */
.multiselect-container {
    position: relative;
}

.multiselect-dropdown {
    min-height: 38px;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.25rem;
    cursor: pointer;
}

.multiselect-options {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border: 2px solid var(--primary-blue);
    border-radius: 10px;
    max-height: 250px;
    overflow-y: auto;
    z-index: 1000;
    display: none;
    margin-top: 4px;
    box-shadow: var(--shadow-lg);
}

.multiselect-options.show {
    display: block;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.multiselect-option {
    padding: 0.75rem 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: all 0.2s ease;
}

.multiselect-option:hover {
    background: linear-gradient(90deg, rgba(37, 99, 235, 0.1) 0%, transparent 100%);
}

.multiselect-option input[type="checkbox"] {
    cursor: pointer;
    width: 18px;
    height: 18px;
    accent-color: var(--primary-blue);
}

.multiselect-option label {
    cursor: pointer;
    margin: 0;
    font-weight: 500;
}

.selected-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
}

.selected-tag {
    background: var(--gradient-blue);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 8px;
    font-size: 0.875rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    animation: tagAppear 0.3s ease;
}

@keyframes tagAppear {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.selected-tag .remove {
    cursor: pointer;
    font-weight: bold;
    font-size: 1.2rem;
    transition: transform 0.2s ease;
}

.selected-tag .remove:hover {
    transform: scale(1.3);
}

.multiselect-placeholder {
    color: #94a3b8;
    font-style: italic;
}

/* ANIMATIONS */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.stat-card,
.card,
.chart-card {
    animation: fadeInUp 0.6s ease forwards;
    opacity: 0;
}

.stat-card:nth-child(1) { animation-delay: 0.1s; }
.stat-card:nth-child(2) { animation-delay: 0.2s; }
.stat-card:nth-child(3) { animation-delay: 0.3s; }
.stat-card:nth-child(4) { animation-delay: 0.4s; }

/* RESPONSIVE DESIGN */
@media (max-width: 1200px) {
    .chart-container {
        height: 300px;
    }
}

/* TRÈS PETITS ÉCRANS */
@media (max-width: 420px) {

    .stat-compact .card-body {
        padding: 0.75rem;
    }

    .stat-compact h4 {
        font-size: 1.05rem;
        line-height: 1.2;
    }

    .stat-compact h6 {
        font-size: 0.7rem;
        margin-bottom: 0.25rem;
    }

    .stat-compact small {
        font-size: 0.65rem;
    }

    .stat-compact i {
        font-size: 1.2rem !important;
    }

    /* Empilement vertical plus propre */
    .stat-compact .d-flex {
        align-items: flex-start !important;
        gap: 0.5rem;
    }
}



@media (max-width: 992px) {
    .navbar-brand {
        font-size: 1.25rem;
    }
    
    .stat-card {
        padding: 1.5rem;
    }
    
    .chart-container {
        height: 280px;
    }
}

@media (max-width: 768px) {
    body::before {
        animation-duration: 30s;
    }
    
    .navbar {
        padding: 0.75rem 0;
    }
    
    .navbar-brand {
        font-size: 1.1rem;
    }
    
    .navbar .btn {
        padding: 0.4rem 1rem;
        font-size: 0.875rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .stat-card {
        padding: 1.25rem;
    }
    
    .stat-card h4 {
        font-size: 1.5rem;
    }
    
    .stat-card h6 {
        font-size: 0.75rem;
    }
    
    .stat-card i {
        font-size: 1.5rem !important;
    }
    
    .chart-card .card-header {
        padding: 1rem;
    }
    
    .chart-card .card-header h5 {
        font-size: 1rem;
    }
    
    .chart-card .card-body {
        padding: 1rem;
    }
    
    .chart-container {
        height: 250px;
    }
    
    .chart-card.fullscreen .chart-container {
        height: calc(100vh - 100px);
    }
    
    .form-label {
        font-size: 0.8rem;
    }
    
    .form-control,
    .form-select,
    .multiselect-dropdown {
        font-size: 0.85rem;
        padding: 0.5rem 0.75rem;
    }
    
    .btn {
        font-size: 0.875rem;
        padding: 0.5rem 1rem;
    }
    
    .selected-tag {
        font-size: 0.8rem;
        padding: 0.2rem 0.6rem;
    }
    
    .multiselect-option {
        padding: 0.6rem 0.75rem;
    }
}

@media (max-width: 576px) {
    .container-fluid {
        padding-left: 1rem !important;
        padding-right: 1rem !important;
    }
    
    .navbar-brand {
        font-size: 1rem;
    }
    
    .stat-card h4 {
        font-size: 1.25rem;
    }
    
    .chart-container {
        height: 220px;
    }
    
    .multiselect-container {
        min-width: 150px !important;
    }
    
    .row.g-3 {
        gap: 0.75rem !important;
    }
}

/* AMÉLIORATION DES SCROLLBARS */
.multiselect-options::-webkit-scrollbar {
    width: 8px;
}

.multiselect-options::-webkit-scrollbar-track {
    background: #f1f5f9;
    border-radius: 10px;
}

.multiselect-options::-webkit-scrollbar-thumb {
    background: var(--gradient-blue);
    border-radius: 10px;
}

.multiselect-options::-webkit-scrollbar-thumb:hover {
    background: var(--primary-blue);
}

/* ÉTATS DE CHARGEMENT */
.stat-card:empty::after,
.chart-container:empty::after {
    content: '';
    display: block;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, #f1f5f9 25%, #e2e8f0 50%, #f1f5f9 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 8px;
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}