/* ========== VARIABLES AFRO PREMIUM ========== */
:root {
    --solaire-jaune: #FFD700;
    --terre-burkina: #E67E22;
    --savane-verte: #2ECC71;
    --nuit-africaine: #0F172A;
    --acajou: #8B4513;
    --kente-dore: #F39C12;
    --lagon-azur: #00CED1;
    --sable-dore: #FEF9E6;
    --ebene: #1E293B;
    --cacao-clair: #FFF8E7;
    --ombre-premium: 0 20px 35px -10px rgba(0,0,0,0.15);
    --glass-effect: rgba(255,255,255,0.1);
    --border-radius-xl: 24px;
    --border-radius-lg: 16px;
    --transition-smooth: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

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

body {
    font-family: 'Poppins', 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, var(--sable-dore) 0%, #FFF5E6 100%);
    color: var(--ebene);
    overflow-x: hidden;
}

/* ========== ANIMATIONS GLASS ========== */
.glass-card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--ombre-premium);
    border: 1px solid rgba(255, 215, 0, 0.3);
    transition: var(--transition-smooth);
}

.glass-card:hover {
    transform: translateY(-8px) scale(1.01);
    box-shadow: 0 25px 45px -12px rgba(0,0,0,0.25);
    border-color: var(--solaire-jaune);
}

/* ========== NAVIGATION PREMIUM ========== */
.navbar-premium {
    background: var(--nuit-africaine);
    backdrop-filter: blur(20px);
    padding: 1rem 2rem;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-premium {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-premium img {
    height: 50px;
    filter: drop-shadow(0 0 10px var(--solaire-jaune));
}

.logo-premium span {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--solaire-jaune), var(--kente-dore));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* ========== SIDEBAR MODERNE ========== */
.sidebar-premium {
    position: fixed;
    left: 0;
    top: 80px;
    width: 280px;
    height: calc(100vh - 80px);
    background: linear-gradient(180deg, var(--nuit-africaine) 0%, #1a1a2e 100%);
    backdrop-filter: blur(10px);
    border-right: 1px solid rgba(255, 215, 0, 0.2);
    transition: var(--transition-smooth);
    z-index: 99;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 25px;
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.sidebar-nav a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 0;
    height: 100%;
    background: linear-gradient(90deg, var(--solaire-jaune), transparent);
    transition: width 0.3s ease;
    z-index: -1;
}

.sidebar-nav a:hover::before,
.sidebar-nav a.active::before {
    width: 100%;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    color: var(--solaire-jaune);
    transform: translateX(5px);
}

/* ========== MAIN CONTENT ========== */
.main-premium {
    margin-left: 280px;
    margin-top: 80px;
    padding: 30px;
    min-height: calc(100vh - 80px);
}

/* ========== HERO SECTION ========== */
.hero-africa {
    background: linear-gradient(135deg, var(--nuit-africaine), var(--ebene));
    border-radius: var(--border-radius-xl);
    padding: 50px;
    margin-bottom: 40px;
    position: relative;
    overflow: hidden;
}

.hero-africa::before {
    content: '🌍';
    position: absolute;
    right: -30px;
    top: -30px;
    font-size: 200px;
    opacity: 0.1;
    transform: rotate(15deg);
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--solaire-jaune), var(--kente-dore));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 15px;
}

.hero-subtitle {
    color: rgba(255,255,255,0.8);
    font-size: 1.2rem;
}

/* ========== STATS CARDS PREMIUM ========== */
.stats-grid-premium {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 50px;
}

.stat-card-premium {
    background: white;
    border-radius: var(--border-radius-lg);
    padding: 30px;
    text-align: center;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.stat-card-premium::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--solaire-jaune), var(--savane-verte), var(--lagon-azur));
    transform: scaleX(0);
    transition: transform 0.5s ease;
}

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

.stat-icon-premium {
    font-size: 3.5rem;
    margin-bottom: 15px;
}

.stat-number-premium {
    font-size: 2.8rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--savane-verte), var(--lagon-azur));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.stat-label-premium {
    color: var(--acajou);
    font-weight: 500;
    margin-top: 8px;
}

/* ========== LIVRES GRID MODERNE ========== */
.livres-grid-premium {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.livre-card-premium {
    background: white;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: var(--transition-smooth);
    cursor: pointer;
}

.livre-card-premium:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--ombre-premium);
}

.livre-image-premium {
    height: 220px;
    background: linear-gradient(135deg, var(--sable-dore), var(--cacao-clair));
    position: relative;
    overflow: hidden;
}

.livre-image-premium img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.livre-badge-premium {
    position: absolute;
    top: 15px;
    right: 15px;
    background: var(--savane-verte);
    color: white;
    padding: 5px 12px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
}

.livre-content-premium {
    padding: 20px;
}

.livre-title-premium {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--nuit-africaine);
    margin-bottom: 8px;
}

.livre-auteur-premium {
    color: var(--acajou);
    font-size: 0.9rem;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 5px;
}

/* ========== BOUTONS STYLÉS ========== */
.btn-premium {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-smooth);
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
}

.btn-primary-premium {
    background: linear-gradient(135deg, var(--savane-verte), var(--lagon-azur));
    color: white;
    box-shadow: 0 4px 15px rgba(46, 204, 113, 0.3);
}

.btn-primary-premium:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(46, 204, 113, 0.4);
}

.btn-secondary-premium {
    background: linear-gradient(135deg, var(--solaire-jaune), var(--kente-dore));
    color: var(--nuit-africaine);
}

.btn-danger-premium {
    background: linear-gradient(135deg, var(--terre-burkina), #C0392B);
    color: white;
}

/* ========== TABLEAUX MODERNES ========== */
.table-premium {
    width: 100%;
    background: white;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--ombre-premium);
}

.table-premium thead {
    background: linear-gradient(135deg, var(--nuit-africaine), var(--ebene));
    color: white;
}

.table-premium th,
.table-premium td {
    padding: 15px 20px;
    text-align: left;
}

.table-premium tbody tr {
    transition: var(--transition-smooth);
    border-bottom: 1px solid #f0f0f0;
}

.table-premium tbody tr:hover {
    background: var(--sable-dore);
    transform: scale(1.01);
}

/* ========== FORMULAIRES PREMIUM ========== */
.form-premium {
    background: white;
    border-radius: var(--border-radius-xl);
    padding: 40px;
    box-shadow: var(--ombre-premium);
}

.form-group-premium {
    margin-bottom: 25px;
}

.form-group-premium label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--nuit-africaine);
}

.form-group-premium input,
.form-group-premium select,
.form-group-premium textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    font-size: 1rem;
    transition: var(--transition-smooth);
}

.form-group-premium input:focus,
.form-group-premium select:focus {
    border-color: var(--savane-verte);
    box-shadow: 0 0 0 3px rgba(46, 204, 113, 0.1);
    outline: none;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
    .sidebar-premium {
        transform: translateX(-100%);
    }
    
    .sidebar-premium.open {
        transform: translateX(0);
    }
    
    .main-premium {
        margin-left: 0;
        padding: 20px;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .stats-grid-premium {
        grid-template-columns: 1fr;
    }
    
    .livres-grid-premium {
        grid-template-columns: 1fr;
    }
}

/* ========== TOAST NOTIFICATION ========== */
.toast-premium {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--nuit-africaine);
    color: white;
    padding: 15px 25px;
    border-radius: 50px;
    display: flex;
    align-items: center;
    gap: 12px;
    transform: translateX(400px);
    transition: transform 0.4s ease;
    z-index: 2000;
    box-shadow: var(--ombre-premium);
    border-left: 4px solid var(--solaire-jaune);
}

.toast-premium.show {
    transform: translateX(0);
}

/* ========== LOADER ========== */
.loader-premium {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--nuit-africaine);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loader-premium.hide {
    opacity: 0;
    visibility: hidden;
}

.spinner-africa {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255,215,0,0.2);
    border-top: 4px solid var(--solaire-jaune);
    border-right: 4px solid var(--savane-verte);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
* {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}