/* ===== AMÉLIORATION DESIGN - VARIABLES & ESPACEMENTS ===== */

:root {
    /* Espacements cohérents */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Couleurs enrichies */
    --primary-color: #1a3a6b;
    --secondary-color: #2d5a9f;
    --accent-color: #d32f2f;
    --accent-light: #ff6b6b;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --white: #ffffff;

    /* Ombres cohérentes */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 8px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);

    /* Gradients premium */
    --gradient-primary: linear-gradient(135deg, #1a3a6b 0%, #d32f2f 100%);
    --gradient-overlay: linear-gradient(135deg, rgba(26, 58, 107, 0.9) 0%, rgba(211, 47, 47, 0.9) 100%);
    --gradient-hover: linear-gradient(135deg, rgba(26, 58, 107, 0.95) 0%, rgba(211, 47, 47, 0.95) 100%);

    /* Transitions fluides */
    --transition-fast: 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
    --transition-normal: 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    --transition-slow: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ===== CARTES MODERNES ===== */

.card, [class*="card"] {
    background: var(--white);
    border-radius: 16px;
    overflow: hidden;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
    position: relative;
}

.card:hover, [class*="card"]:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.card-image, .card-img {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    object-position: center;
    display: block;
    transition: transform var(--transition-normal);
}

.card:hover .card-image,
.card:hover .card-img {
    transform: scale(1.08);
}

.card-content {
    padding: var(--spacing-lg);
}

.card-title {
    font-size: 1.4rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
}

.card-description {
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

/* ===== BOUTONS MODERNES ===== */

.btn, button, [class*="btn"] {
    padding: 12px 28px;
    border-radius: 8px;
    border: none;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
    text-decoration: none;
    display: inline-block;
    font-family: inherit;
}

.btn-primary, .btn:not([class*="secondary"]):not([class*="outline"]) {
    background: var(--gradient-primary);
    color: var(--white);
}

.btn-primary:hover, .btn:not([class*="secondary"]):not([class*="outline"]):hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
    background: var(--gradient-hover);
}

.btn-secondary {
    background: var(--white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.btn-outline {
    background: transparent;
    border: 2px solid var(--accent-color);
    color: var(--accent-color);
}

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

/* ===== SECTIONS - ESPACEMENT ===== */

section {
    padding: var(--spacing-3xl) var(--spacing-lg);
}

section:nth-child(even) {
    background: linear-gradient(135deg, rgba(26, 58, 107, 0.03) 0%, rgba(211, 47, 47, 0.02) 100%);
}

/* ===== TITRES & SOUS-TITRES ===== */

.section-title {
    font-size: clamp(2rem, 5vw, 3.2rem);
    text-align: center;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
    position: relative;
    padding-bottom: var(--spacing-lg);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== GRILLES DE CARTES ===== */

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

@media (min-width: 768px) {
    .cards-grid {
        grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
        gap: var(--spacing-2xl);
    }
}

@media (min-width: 1024px) {
    .cards-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-2xl);
    }
}

/* ===== ANIMATIONS SCROLL - INTERSECTION OBSERVER ===== */

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all var(--transition-slow);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: all var(--transition-slow);
}

.fade-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: all var(--transition-slow);
}

.fade-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.scale-in {
    opacity: 0;
    transform: scale(0.95);
    transition: all var(--transition-slow);
}

.scale-in.visible {
    opacity: 1;
    transform: scale(1);
}

/* ===== INPUTS MODERNES ===== */

input, textarea, select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: all var(--transition-fast);
    background: var(--white);
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(26, 58, 107, 0.1);
}

input:hover, textarea:hover, select:hover {
    border-color: var(--primary-color);
}

/* ===== BADGES & TAGS ===== */

.badge {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    background: linear-gradient(135deg, rgba(26, 58, 107, 0.1), rgba(211, 47, 47, 0.1));
    color: var(--primary-color);
}

.badge-primary {
    background: var(--primary-color);
    color: var(--white);
}

.badge-secondary {
    background: var(--accent-color);
    color: var(--white);
}

/* ===== IMAGES RESPONSIVES & LAZY LOADING ===== */

img {
    max-width: 100%;
    height: auto;
    display: block;
}

img[loading="lazy"] {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 2s infinite;
}

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

/* ===== HOVER EFFECTS ===== */

.hover-lift {
    transition: all var(--transition-normal);
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.hover-glow {
    transition: all var(--transition-normal);
}

.hover-glow:hover {
    box-shadow: 0 0 20px rgba(211, 47, 47, 0.4);
}

.hover-shade {
    transition: all var(--transition-normal);
}

.hover-shade:hover {
    filter: brightness(0.95);
}

/* ===== RESPONSIVE DESIGN AMÉLIORÉ ===== */

@media (max-width: 768px) {
    :root {
        --spacing-xl: 2rem;
        --spacing-2xl: 3rem;
        --spacing-3xl: 4rem;
    }

    section {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .section-title {
        font-size: 2rem;
        margin-bottom: var(--spacing-md);
    }

    .cards-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
}

/* ===== LOADER & SKELETON ===== */

.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 2s infinite;
    border-radius: 8px;
}

/* ===== TRANSITIONS LISSES ===== */

* {
    scroll-behavior: smooth;
}

a, button, [role="button"] {
    transition: all var(--transition-normal);
}

/* ===== ACCESSIBILITÉ ===== */

button:focus, a:focus, input:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ===== FOOTER ===== */

.footer {
    background: var(--bg-light);
    color: var(--text-dark);
    padding: var(--spacing-lg) 0;
    font-size: 0.9rem;
}

.footer-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
    align-items: start;
}

.footer-logo h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-xs);
    color: var(--primary-color);
}

.footer-logo p {
    font-size: 0.85rem;
    color: var(--text-light);
}

.footer-links h4 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
    color: var(--primary-color);
}

.footer-links ul {
    list-style: none;
    padding: 0;
}

.footer-links ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-links ul li a {
    color: var(--text-dark);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-links ul li a:hover {
    color: var(--primary-color);
}

.footer-social .social-icons {
    display: flex;
    gap: var(--spacing-sm);
}

.footer-social .social-icons a {
    color: var(--text-dark);
    font-size: 1.2rem;
    transition: color var(--transition-fast);
}

.footer-social .social-icons a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    margin-top: var(--spacing-lg);
    font-size: 0.8rem;
    color: var(--text-light);
}

/* ===== SCROLLBAR PERSONNALISÉ ===== */

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-light);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}