/* ===== VARIÁVEIS ===== */
:root {
    --azul-primario: #1976D2;
    --azul-escuro: #0D47A1;
    --branco: #FFFFFF;
    --cinza-claro: #F5F5F5;
    --cinza-borda: #E0E0E0;
    --sombra: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* ===== ESTRUTURA PRINCIPAL ===== */
.menu-lateral {
    width: 250px;
    height: 100vh;
    background: var(--branco);
    box-shadow: var(--sombra);
    position: fixed;
    left: 0;
    top: 0;
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: all 0.3s ease;
}

/* ===== LOGO ===== */
.logo-container {
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid var(--cinza-borda);
}

.logo {
    max-width: 80%;
    height: auto;
}

/* ===== MENU DE NAVEGAÇÃO ===== */
.nav-menu {
    flex: 1;
    padding: 20px 0;
}

.nav-menu ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-item {
    margin: 5px 0;
}

.nav-item a {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: #555;
    text-decoration: none;
    transition: all 0.2s;
}

.nav-item a:hover {
    background-color: var(--cinza-claro);
    color: var(--azul-primario);
}

.nav-item.active a {
    background-color: rgba(25, 118, 210, 0.1);
    color: var(--azul-primario);
    border-left: 3px solid var(--azul-primario);
}

.nav-item .icon {
    margin-right: 12px;
    font-size: 1.2rem;
}

.nav-item.logout {
    margin-top: 20px;
    border-top: 1px solid var(--cinza-borda);
    padding-top: 10px;
}

/* ===== USUÁRIO ===== */
.user-info {
    padding: 15px;
    display: flex;
    align-items: center;
    border-top: 1px solid var(--cinza-borda);
    background: var(--cinza-claro);
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: var(--azul-primario);
    color: var(--branco);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 10px;
    font-weight: bold;
}

.user-name {
    font-size: 0.9rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ===== RESPONSIVO ===== */
@media (max-width: 768px) {
    .menu-lateral {
        width: 70px;
    }
    
    .logo {
        max-width: 40px;
    }
    
    .nav-item span {
        display: none;
    }
    
    .nav-item .icon {
        margin-right: 0;
        font-size: 1.4rem;
    }
    
    .user-name {
        display: none;
    }
    
    .user-avatar {
        margin: 0 auto;
    }
}