/* ===== DESIGN SYSTEM MODERNE ===== */
:root {
    /* Couleurs principales */
    --primary-50: #f0f9f4;
    --primary-100: #dcf2e4;
    --primary-200: #bce5ce;
    --primary-300: #8dd1ae;
    --primary-400: #5bb587;
    --primary-500: #2c5530;
    --primary-600: #1f4024;
    --primary-700: #1a351f;
    --primary-800: #152b1a;
    --primary-900: #0f1f13;

    /* Couleurs neutres */
    --neutral-50: #fafafa;
    --neutral-100: #f5f5f5;
    --neutral-200: #e5e5e5;
    --neutral-300: #d4d4d4;
    --neutral-400: #a3a3a3;
    --neutral-500: #737373;
    --neutral-600: #525252;
    --neutral-700: #404040;
    --neutral-800: #262626;
    --neutral-900: #171717;

    /* Couleurs sémantiques */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%);
    --gradient-success: linear-gradient(135deg, var(--success) 0%, #059669 100%);
    --gradient-card: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);

    /* Ombres */
    --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);

    /* Rayons de bordure */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Espacements */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;

    /* Animations */
    --transition-fast: 150ms ease-out;
    --transition-normal: 250ms ease-out;
    --transition-slow: 350ms ease-out;
    --transition-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* ===== RESET MODERNE ===== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--neutral-700);
    background: linear-gradient(135deg, var(--neutral-50) 0%, var(--primary-50) 100%);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== TYPOGRAPHY MODERNE ===== */
h1, h2, h3, h4, h5, h6 {
    color: var(--neutral-900);
    font-weight: 700;
    letter-spacing: -0.025em;
    line-height: 1.2;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 2rem); }
h4 { font-size: clamp(1.125rem, 2.5vw, 1.5rem); }

/* ===== BOUTONS MODERNES ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border: none;
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    white-space: nowrap;
    user-select: none;
    transform: translateY(0);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left var(--transition-slow);
}

.btn:hover::before {
    left: 100%;
}

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

.btn:active {
    transform: translateY(0);
    transition: all var(--transition-fast);
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    box-shadow: var(--shadow-xl);
    filter: brightness(1.1);
}

.btn-outline {
    background: white;
    color: var(--primary-600);
    border: 2px solid var(--primary-200);
    box-shadow: var(--shadow-sm);
}

.btn-outline:hover {
    background: var(--primary-50);
    border-color: var(--primary-300);
}

.btn-success {
    background: var(--gradient-success);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: 1rem;
    border-radius: var(--radius-xl);
}

.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: 0.75rem;
    border-radius: var(--radius-md);
}

/* ===== NAVIGATION MODERNE ===== */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--neutral-200);
    padding: var(--space-4) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-600);
    text-decoration: none;
}

.nav-brand i {
    font-size: 2rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    gap: var(--space-2);
    align-items: center;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    color: var(--neutral-600);
    text-decoration: none;
    border-radius: var(--radius-lg);
    font-weight: 500;
    transition: all var(--transition-normal);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    background: var(--primary-50);
    color: var(--primary-700);
    transform: translateY(-1px);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

/* ===== CARTES MODERNES ===== */
.card {
    background: var(--gradient-card);
    border: 1px solid var(--neutral-200);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: all var(--transition-normal);
    position: relative;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-200);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

/* ===== PRODUITS MODERNES ===== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-8);
    padding: var(--space-8) 0;
}

.product-card {
    background: white;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
    position: relative;
    border: 1px solid var(--neutral-100);
}

.product-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-2xl);
    border-color: var(--primary-200);
}

.product-image {
    height: 220px;
    overflow: hidden;
    position: relative;
    background: var(--gradient-primary);
}

.product-image::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 40px;
    background: linear-gradient(transparent, rgba(0,0,0,0.1));
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.product-card:hover .product-image img {
    transform: scale(1.1);
}

.product-info {
    padding: var(--space-6);
}

.product-info h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--neutral-900);
    margin-bottom: var(--space-2);
}

.product-info p {
    color: var(--neutral-600);
    font-size: 0.875rem;
    margin-bottom: var(--space-4);
    line-height: 1.5;
}

.product-price {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--success);
    margin-bottom: var(--space-6);
    display: flex;
    align-items: baseline;
    gap: var(--space-2);
}

.product-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.quantity-controls {
    display: flex;
    align-items: center;
    background: var(--neutral-100);
    border-radius: var(--radius-full);
    padding: var(--space-1);
    width: fit-content;
    margin: 0 auto;
}

.qty-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: white;
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.qty-btn:hover {
    background: var(--primary-500);
    color: white;
    transform: scale(1.1);
}

.qty-btn:active {
    transform: scale(0.95);
}

.quantity-controls input {
    width: 60px;
    border: none;
    background: transparent;
    text-align: center;
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--neutral-900);
}

.add-to-cart {
    width: 100%;
    padding: var(--space-4);
    font-size: 1rem;
    font-weight: 700;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.add-to-cart:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

/* ===== PANIER MODERNE ===== */
.floating-cart {
    position: fixed;
    bottom: var(--space-8);
    right: var(--space-8);
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--shadow-xl);
    z-index: 1000;
    transition: all var(--transition-normal);
    border: 4px solid white;
}

.floating-cart:hover {
    transform: scale(1.1) rotate(5deg);
    box-shadow: var(--shadow-2xl);
}

.cart-count {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--error);
    color: white;
    border-radius: var(--radius-full);
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    animation: bounce 0.5s ease-out;
}

@keyframes bounce {
    0%, 20%, 60%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    80% { transform: translateY(-5px); }
}

.cart-sidebar {
    position: fixed;
    top: 0;
    right: -450px;
    width: 450px;
    height: 100vh;
    background: white;
    box-shadow: var(--shadow-2xl);
    z-index: 1001;
    transition: right var(--transition-slow);
    display: flex;
    flex-direction: column;
}

.cart-sidebar.open {
    right: 0;
}

.cart-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--neutral-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--primary-50);
}

.cart-header h3 {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--primary-700);
    margin: 0;
}

.close-cart {
    width: 40px;
    height: 40px;
    border: none;
    background: var(--neutral-100);
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
}

.close-cart:hover {
    background: var(--error);
    color: white;
    transform: rotate(90deg);
}

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

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.animate-fade-in {
    animation: fadeInUp 0.6s ease-out;
}

.animate-slide-in {
    animation: slideInRight 0.4s ease-out;
}

.animate-pulse {
    animation: pulse 2s infinite;
}

/* ===== ALERTS MODERNES ===== */
.alert {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-6);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-6);
    font-weight: 500;
    border: 1px solid;
    position: relative;
    overflow: hidden;
}

.alert::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
}

.alert-success {
    background: #f0fdf4;
    color: #166534;
    border-color: #bbf7d0;
}

.alert-success::before {
    background: var(--success);
}

.alert-error {
    background: #fef2f2;
    color: #991b1b;
    border-color: #fecaca;
}

.alert-error::before {
    background: var(--error);
}

/* ===== RESPONSIVE MODERNE ===== */
@media (max-width: 768px) {
    .products-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
        padding: var(--space-6) var(--space-4);
    }
    
    .cart-sidebar {
        width: 100vw;
        right: -100vw;
    }
    
    .floating-cart {
        bottom: var(--space-6);
        right: var(--space-6);
        width: 60px;
        height: 60px;
    }
    
    .nav-menu {
        flex-wrap: wrap;
        gap: var(--space-1);
    }
    
    .nav-link {
        padding: var(--space-2) var(--space-3);
        font-size: 0.875rem;
    }
}

/* ===== ÉTATS DE CHARGEMENT ===== */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--neutral-300);
    border-radius: 50%;
    border-top-color: var(--primary-500);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.skeleton {
    background: linear-gradient(90deg, var(--neutral-200) 25%, var(--neutral-100) 50%, var(--neutral-200) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

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

/* ===== SCROLLBAR PERSONNALISÉE ===== */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--neutral-300);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-400);
}