:root {
    /* Couleurs claires */
    --background: #ffffff;
    --card-background: #ffffff;
    --text-color: #333333;
    --border-color: #dddddd;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --accent-color: #e74c3c;
}

[data-theme="dark"] {
    /* Couleurs sombres */
    --background: #1a1a1a;
    --card-background: #2d2d2d;
    --text-color: #ffffff;
    --border-color: #404040;
    --shadow-color: rgba(0, 0, 0, 0.3);
}

/* Reset et base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--background);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Navigation */
.main-nav {
    background: var(--card-background);
    box-shadow: 0 2px 10px var(--shadow-color);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--primary-color);
    font-size: 1.5rem;
    font-weight: 600;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-color);
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: all 0.3s;
}

.nav-link:hover, .nav-link.active {
    background: var(--primary-color);
    color: white;
}

.nav-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

/* Boutons */
.theme-toggle, .logout-btn {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.3s;
}

.theme-toggle:hover, .logout-btn:hover {
    background: var(--border-color);
}

/* Contenu principal */
.main-content {
    flex: 1;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* Footer */
.main-footer {
    background: var(--card-background);
    padding: 1rem;
    text-align: center;
    margin-top: auto;
}

/* Cartes */
.card {
    background: var(--card-background);
    border-radius: 10px;
    box-shadow: 0 2px 10px var(--shadow-color);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-links {
        width: 100%;
        justify-content: center;
    }

    .nav-actions {
        width: 100%;
        justify-content: center;
    }

    .nav-link span {
        display: none;
    }
}